Fukamachi Yasushi
| Arctic Research Center | Professor |
Last Updated :2026/02/04
■Researcher basic information
Researchmap personal page
Home Page URL
Researcher number
- 20250508
J-Global ID
Research Keyword
Educational Organization
- Master's degree program, Graduate School of Environmental Science
- Doctoral (PhD) degree program, Graduate School of Environmental Science
■Career
Career
- Apr. 2025 - Present
Hokkaido University, Arctic Research Center, 総合戦略室,北極域学創成部門・北極域研究ユニット, 副センター長 - Oct. 2018 - Mar. 2025
北海道大学北極域研究センター, 大気圏・水圏研究グループ, 教授 - Feb. 2011 - Sep. 2018
Water and Material Cycles Section, Institute of Low Temperature Science, Hokkaido University, Associate Professor - Oct. 2008 - Jan. 2011
Water and Material Cycles Section, Institute of Low Temperature Science, Hokkaido University, Assistant Professor - Apr. 2007 - Sep. 2008
Marine and Atmospheric Science Research Section, Institute of Low Temperature Science, Hokkaido University, Assistant Professor - Apr. 1995 - Mar. 2007
Marine and Atmospheric Science Research Section, Institute of Low Temperature Science, Hokkaido University, Assistant Professor - Nov. 1992 - Mar. 1995
Oceanography Section, Institute of Low Temperature Science, Hokkaido University, Assistant Professor
Educational Background
Committee Memberships
- 2007 - Present
Polar Science (Elsevier), Associate Editor, Society - 2007 - Present
Polar Science (Elsevier), Associate Editor, Others - 2006 - Present
CLIVAR/CliC/SCAR Southern Ocean Region Implementation Panel, Panel member, Society - 2006 - Present
CLIVAR/CliC/SCAR Southern Ocean Region Implementation Panel, Panel Member, Society
Position History
■Research activity information
Papers
- Long-term observation of the Soya Warm Current using HF ocean radars: relationship between the Soya Warm Current variability and the sea level anomalies in the Soya/La Perouse Strait
Naoto Ebuchi, Yasushi Fukamachi, Kay I. Ohshima, Humio Mitsudera, Jun Nishioka, Toru Takatsuka, Kazuya Ono, Masao Ishikawa, Takaharu Daibo, Kunio Shirasawa, Masaaki Wakatsuchi
Journal of Oceanography, Springer Science and Business Media LLC, 23 May 2024
Scientific journal - Long-Term Observation of the Soya Warm Current Combining HF Ocean Radars with Coastal Tide Gauges and Satellite Altimetry
N. Ebuchi, Y. Fukamachi, K.I. Ohshima, T. Takatsuka, H. Mitsudera, J. Nishioka, K. Ono, M. Ishikawa, T. Daibo, K. Shiwasawa, M. Wakatsuchi
IGARSS 2023 - 2023 IEEE International Geoscience and Remote Sensing Symposium, IEEE, 16 Jul. 2023
International conference proceedings - Particle-tracking experiments of coastal-origin sea ice that could induce high biological productivity in the Sea of Okhotsk
Mizuki Kuga, Kay I. Ohshima, Noriaki Kimura, Kazuki Nakata, Yasushi Fukamachi
Journal of Oceanography, 79, 2, 145, 159, Springer Science and Business Media LLC, 28 Nov. 2022, [Peer-reviewed]
Scientific journal - Dominant frazil ice production in the Cape Darnley polynya leading to Antarctic Bottom Water formation
Kay I. Ohshima, Yasushi Fukamachi, Masato Ito, Kazuki Nakata, Daisuke Simizu, Kazuya Ono, Daiki Nomura, Gen Hashida, Takeshi Tamura
Science Advances, 8, 42, American Association for the Advancement of Science (AAAS), 21 Oct. 2022, [Peer-reviewed]
Scientific journal, Antarctic Bottom Water (AABW) occupies the abyssal layer of the world ocean and contributes to the global overturning circulation. It originates from dense shelf water, which forms from brine rejection during sea ice production. An important region of AABW formation has been identified off the Cape Darnley polynya. However, it remains unclear why and how high ice production leads to AABW formation. Using moored acoustic measurements and a satellite microwave algorithm, we reveal that underwater frazil ice dominates in the polynya. This underwater ice formation prevents heat-insulating surface-cover ice forming, thereby enabling efficient ice production. The high ice production in the nearshore and longer residence times create high-salinity source water for the AABW. Underwater frazil ice occurs as long as strong winds continue and occasionally penetrates depths of at least 80 m. Deep-penetrating frazil ice is particularly prominent in this polynya, while it also occurs in other Antarctic coastal polynyas. - Effects of the glacial meltwater supply on carbonate chemistry in Bowdoin Fjord, Northwestern Greenland
Takahito Horikawa, Daiki Nomura, Naoya Kanna, Yasushi Fukamachi, Shin Sugiyama
Frontiers in Marine Science, 9, Frontiers Media SA, 22 Jul. 2022
Scientific journal, To understand the effects of the glacial meltwater supply on carbonate chemistry and the air–sea CO2 flux within the fjord, water samples were collected in Bowdoin Fjord in northwestern Greenland for dissolved inorganic carbon (DIC) concentration, total alkalinity (TA), oxygen isotopic ratio (δ18O), and chlorophyll a concentration analyses in the summers of 2016 and 2017. The partial pressure of CO2 (pCO2) in surface water, calculated from DIC and TA, was less than 200 µatm, and was significantly lower than that in the atmosphere (399 ± 3 µatm). Therefore, surface water of the fjord acts as sink for CO2 in the atmosphere (–4.9 ± 0.7 mmol m–2 d–1). To evaluate the effects of freshwater and land-derived substances by glacial meltwater on pCO2 in the fjord, we calculated the changes of pCO2 in salinity and carbonate chemistry that would result from the inflow of glacial meltwater into the fjord. The calculated pCO2 was high near the calving front, where the contribution of glacier meltwater was significant. Examination of the relationship between salinity-normalized DIC and TA, which was considered DIC and TA input from the land, suggested that the land-derived high pCO2 freshwater affected mainly by the remineralization of the organic matter by bacterial activity was supplied to the Bowdoin Fjord. - A neural network-based method for satellite-based mapping of sediment-laden sea ice in the Arctic
Hisatomo Waga, Hajo Eicken, Bonnie Light, Yasushi Fukamachi
Remote Sensing of Environment, 270, 112861, 112861, Mar. 2022, [Peer-reviewed]
English, Scientific journal - Oceanic conditions in the Barrow Coastal Polynya revealed by a 10-year mooring time series
Daisuke Hirano, Yasushi Fukamachi, Kay I. Ohshima, Masato Ito, Takeshi Tamura, Daisuke Simizu, Toru Takatsuka, Andrew R. Mahoney, Joshua Jones, Craig George, Billy Adams, Hajo Eicken
Progress in Oceanography, 102781, 102781, Elsevier BV, Mar. 2022
Scientific journal - Variability in spring phytoplankton blooms associated with ice retreat timing in the Pacific Arctic from 2003–2019
Hisatomo Waga, Hajo Eicken, Toru Hirawake, Yasushi Fukamachi
PLOS ONE, 16, 12, e0261418, e0261418, 16 Dec. 2021
English, Scientific journal - Subglacial discharge controls seasonal variations in the thermal structure of a glacial lake in Patagonia
Shin Sugiyama, Masahiro Minowa, Yasushi Fukamachi, Shuntaro Hata, Yoshihiro Yamamoto, Tobias Sauter, Christoph Schneider, Marius Schaefer
Nature Communications, 12, 1, Springer Science and Business Media LLC, Dec. 2021
Scientific journal,Abstract Water temperature in glacial lakes affects underwater melting and calving of glaciers terminating in lakes. Despite its importance, seasonal lake temperature variations are poorly understood because taking long-term measurements near the front of calving glaciers is challenging. To investigate the thermal structure and its seasonal variations, we performed year-around temperature and current measurement at depths of 58–392 m in Lago Grey, a 410-m-deep glacial lake in Patagonia. The measurement revealed critical impacts of subglacial discharge on the lake thermal condition. Water below a depth of ~100 m showed the coldest temperature in mid-summer, under the influence of glacial discharge, whereas temperature in the upper layer followed a seasonal variation of air temperature. The boundary of the lower and upper layers was controlled by the depth of a sill which blocks outflow of dense and cold glacial meltwater. Our data implies that subglacial discharge and bathymetry dictate mass loss and the retreat of lake-terminating glaciers. The cold lakewater hinders underwater melting and facilitates formation of a floating terminus. - Underwater frazil ice and its suspension depth detected from ADCP backscatter data around sea ice edge in the Sea of Okhotsk
Masato Ito, Kay I. Ohshima, Yasushi Fukamachi, Genta Mizuta, Yoshimu Kusumoto, Takashi Kikuchi
Cold Regions Science and Technology, 103382, 103382, Elsevier BV, Aug. 2021
Scientific journal - Seasonal Evolution of Cape Darnley Bottom Water Revealed by Mooring Measurements
Genta Mizuta, Yasushi Fukamachi, Daisuke Simizu, Yoshimasa Matsumura, Yujiro Kitade, Daisuke Hirano, Masakazu Fujii, Yoshifumi Nogi, Kay Ohshima
FRONTIERS IN MARINE SCIENCE, 8, Aug. 2021
English, Scientific journal - Status and trends of Arctic Ocean environmental change and its impacts on marine biogeochemistry: Findings from the ArCS project
Takashi Kikuchi, Shigeto Nishino, Amane Fujiwara, Jonaotaro Onodera, Michiyo Yamamoto-Kawai, Kohei Mizobata, Yasushi Fukamachi, Eiji Watanabe
POLAR SCIENCE, 27, Mar. 2021
English, Scientific journal - Rapidly changing glaciers, ocean and coastal environments, and their impact on human society in the Qaanaaq region, northwestern Greenland
Shin Sugiyama, Naoya Kanna, Daiki Sakakibara, Takuto Ando, Izumi Asaji, Ken Kondo, Yefan Wang, Yoshiki Fujishi, Shungo Fukumoto, Evgeniy Podolskiy, Yasushi Fukamachi, Minori Takahashi, Sumito Matoba, Yoshinori Iizuka, Ralf Greve, Masato Furuya, Kazutaka Tateyama, Tatsuya Watanabe, Shintaro Yamasaki, Atsushi Yamaguchi, Bungo Nishizawa, Kohei Matsuno, Daiki Nomura, Yuta Sakuragi, Yoshimasa Matsumura, Yoshihiko Ohashi, Teruo Aoki, Masashi Niwano, Naotaka Hayashi, Masahiro Minowa, Guillaume Jouvet, Eef van Dongen, Andreas Bauder, Martin Funk, Anders Anker Bjork, Toku Oshima
POLAR SCIENCE, 27, Mar. 2021
English, Scientific journal - Iron Supply by Subglacial Discharge Into a Fjord Near the Front of a Marine‐Terminating Glacier in Northwestern Greenland
Naoya Kanna, Shin Sugiyama, Yasushi Fukamachi, Daiki Nomura, Jun Nishioka
Global Biogeochemical Cycles, 34, 10, American Geophysical Union (AGU), Oct. 2020
Scientific journal - Observational evidence of supercooling and frazil ice formation throughout the water column in a coastal polynya in the Sea of Okhotsk
Masato Ito, Yasushi Fukamachi, Kay I. Ohshima, Kunio Shirasawa
Continental Shelf Research, 196, Elsevier Ltd, 15 May 2020
English, Scientific journal - Sea ice observation with ocean HF radar.
Zhang, W., N. Ebuchi, Y. Fukamachi, F. Cheng, K. I. Ohshima, B. Emery, T. Toyota, H. Abe, K. Shirasawa
IEEE Transactions of Geoscience and Remote Sensing, 58, 1, 378, 390, Jan. 2020, [Peer-reviewed]
English, Scientific journal - Favorable Conditions for Suspension Freezing in an Arctic Coastal Polynya
Ito Masato, Ohshima Kay I, Fukamachi Yasushi, Hirano Daisuke, Mahoney Andrew R, Jones Joshua, Takatsuka Toru, Eicken Hajo
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS, 124, 12, 8701, 8719, 08 Dec. 2019, [Peer-reviewed]
Scientific journal - Sea Ice Observation With Oceanographic HF Radar
Zhang, W, N. Ebuchi, Y. Fukamachi, F. Cheng, K. I. Ohshima, B. Emery, T. Toyota, H. Abe, K. Shirasawa
IEEE Transactions on Geoscience and Remote Sensing, 58, 1, 1, 13, Sep. 2019, [Peer-reviewed]
English, Scientific journal - Evaluation of AMSR-E Thin Ice Thickness Algorithm from a Mooring-Based Observation: How Can the Satellite Observe a Sea Ice Field with Nonuniform Thickness Distribution?
Kashiwase, H, K. I. Ohshima, Y. Fukamachi, S. Nihashi, T. Tamura
Journal of Atmospheric and Oceanic Technology, 36, 8, 1623, 1641, American Meteorological Society, Aug. 2019, [Peer-reviewed]
English, Scientific journal,Abstract The quantification of sea ice production in coastal polynyas is a key issue to understand the global climate system. In this study, we directly compared Advanced Microwave Scanning Radiometer-EOS (AMSR-E) data with the sea ice thickness distribution obtained from a mooring observation during the winter of 2003 off Sakhalin in the Sea of Okhotsk to evaluate the algorithm for estimation of sea ice thickness in coastal polynyas. By using thermal ice thickness as a target physical quantity, we found that the obtained relationship between the polarization ratio (PR) and ice thickness can provide an appropriate AMSR-E algorithm to estimate thin ice thickness, irrespective of the uniform or nonuniform ice thickness field. The relationship between the PR value and thermal ice thickness is likewise consistent with the local PR–thickness relationship that is observed at individual ice floes. This is because both the PR value and thermal ice thickness are more sensitive to thinner ice. Furthermore, we evaluated the method for detection of active frazil in a coastal polynya by comparing with the mooring data, and subsequently modified it to classify the coastal polynya into three thin ice types, namely, active frazil, thin solid ice, and mixed ice (mixture of active frazil and thin solid ice). The improved algorithm successfully represents the thermal ice thickness even for a relatively small-scale polynya off Sakhalin and is expected to be useful for better quantification of sea ice production in the global ocean owing to its high versatility. - Instantaneous sea ice drift speed from TanDEM-X interferometry
Dyre Oliver Dammann, Leif E. B. Eriksson, Joshua M. Jones, Andrew R. Mahoney, Roland Romeiser, Franz J. Meyer, Hajo Eicken, Yasushi Fukamachi
The Cryosphere, 13, 1395, 1408, Apr. 2019, [Peer-reviewed]
English, Scientific journal - Activities to promote industry-government-academia collaborative research on the Arctic Region supported by Japan Arctic Research Network Center (J-ARC Net)
Tanaka, M, Y. Fukamachi, S. Tanaka, S. Saitoh
Proceedings of the 34th International Symposium on the Okhotsk Sea & Polar Oceans 2019, 36th, 167, 170, Feb. 2019
English, International conference proceedings - Study on Oil Spill Response Technology in Cold Water Condition - Lessons learned from Exxon Valdes and Deepwater Horizon -
Nakazawa, N, H. Yamaguchi, A. Kurokawa, J. Ono, T. Terashima, G. Sagawa, S. Yano, Y. Fukamachi, K. I. Ohshima
Proceedings of the 34th International Symposium on the Okhotsk Sea & Polar Oceans 2019, 190, 192, Feb. 2019
International conference proceedings - Arctic Technology Research Forum to consolidate opinions form industry
Kikuchi, T, H. Yamaguchi, H. Yoshinaga, S. Fukuba, M. Miwa, T. Kashiwagi, H. Yoshida, K. I. Ohshima, Y. Fukamachi, H. Yabuki, Y. Kodama
Proceedings of the 34th International Symposium on the Okhotsk Sea & Polar Oceans 2019, 171, 175, Feb. 2019
International conference proceedings - Year-round observations of sea-ice drift and near-inertial internal waves in the Northwind Abyssal Plain, Arctic Ocean
Kawaguchi, Y, M. Itoh, Y. Fukamachi, E. Moriya, J. Onodera, T. Kikuchi, N. Harada
Polar Science, 21, 212, 223, Elsevier BV, Jan. 2019, [Peer-reviewed]
English, Scientific journal - Winter Water Formation in Coastal Polynyas of the Eastern Chukchi Shelf: Pacific and Atlantic Influences
Daisuke Hirano, Yasushi Fukamachi, Kay I. Ohshima, Eiji Watanabe, Andrew R. Mahoney, Hajo Eicken, Motoyo Itoh, Daisuke Simizu, Katsushi Iwamoto, Joshua Jones, Toru Takatsuka, Takashi Kikuchi, Takeshi Tamura
Journal of Geophysical Research: Oceans, 123, 8, 5688, 5705, Aug. 2018, [Peer-reviewed]
English, Scientific journal - Monitoring of the Soya Warm Current by HF ocean radars since 2003.
Ebuchi, N, Y. Fukamachi, K. I. Ohshima, T. Takatsuka, M. Ishikawa, K. Shirasawa, M. Wakatsuchi
Proceedings of the 4th ORCA, Jun. 2018
English, International conference proceedings - Upwelling of Macronutrients and Dissolved Inorganic Carbon by a Subglacial Freshwater Driven Plume in Bowdoin Fjord, Northwestern Greenland
Naoya Kanna, Shin Sugiyama, Yoshihiko Ohashi, Daiki Sakakibara, Yasushi Fukamachi, Daiki Nomura
Journal of Geophysical Research: Biogeosciences, 123, 5, 1666, 1682, American Geophysical Union (AGU), May 2018, [Peer-reviewed]
English, Scientific journal - Sea-ice thickness in the coastal northeastern Chukchi Sea from moored ice-profiling sonar
Yasushi Fukamachi, Daisuke Simizu, Kay I. Ohshima, Hajo Eicken, Andrew R. Mahoney, Katsushi Iwamoto, Erika Moriya, Sohey Nihashi
JOURNAL OF GLACIOLOGY, 63, 241, 888, 898, Oct. 2017, [Peer-reviewed]
English, Scientific journal - Observations of frazil ice formation and upward sediment transport in the Sea of Okhotsk: A possible mechanism of iron supply to sea ice
Masato Ito, Kay I. Ohshima, Yasushi Fukamachi, Genta Mizuta, Yoshimu Kusumoto, Jun Nishioka
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS, 122, 2, 788, 802, Feb. 2017, [Peer-reviewed]
English, Scientific journal - Landfast sea ice breakouts: Stabilizing ice features, oceanic and atmospheric forcing at Barrow, Alaska
Joshua Jones, Hajo Eicken, Andrew Mahoney, M. Rohith, Chandra Kambhamettu, Yasushi Fukamachi, Kay I. Ohshima, J. Craig George
CONTINENTAL SHELF RESEARCH, 126, 50, 63, Sep. 2016, [Peer-reviewed]
English, Scientific journal - The suppression of Antarctic bottom water formation by melting ice shelves in Prydz Bay
G. D. Williams, L. Herraiz-Borreguero, F. Roquet, T. Tamura, K. I. Ohshima, Y. Fukamachi, A. D. Fraser, L. Gao, H. Chen, C. R. McMahon, R. Harcourt, M. Hindell
NATURE COMMUNICATIONS, 7, Aug. 2016, [Peer-reviewed]
English, Scientific journal - Sea ice observation by high frequency ocean radar in the southern Sea of Okhotsk.
Zhang, W, H. Abe, N. Ebuchi, Y. Fukamachi, B. Emery, F. Cheng, Y. Xiao, K. Shirasawa
Proceedings of Third Ocean Radar Conference for Asia, 37, 44, Apr. 2016
English, International conference proceedings - Surface water mass composition changes captured by cores of Arctic land-fast sea ice
I. J. Smith, H. Eicken, A. R. Mahoney, R. Van Hale, A. J. Gough, Y. Fukamachi, J. Jones
CONTINENTAL SHELF RESEARCH, 118, 154, 164, Apr. 2016, [Peer-reviewed]
English, Scientific journal - Estimation of wind drift current in the Soya Strait
Wei Zhang, Naoto Ebuchi, Yasushi Fukamachi, Yutaka Yoshikawa
JOURNAL OF OCEANOGRAPHY, 72, 2, 299, 311, Apr. 2016, [Peer-reviewed]
English, Scientific journal - Interannual variability in sea-ice thickness in the pack-ice zone off Lutzow-Holm Bay, East Antarctica
Fuko Sugimoto, Takeshi Tamura, Haruhito Shimoda, Shotaro Uto, Daisuke Simizu, Kazutaka Tateyama, Seita Hoshino, Toshihiro Ozeki, Yasushi Fukamachi, Shuki Ushio, Kay I. Ohshima
POLAR SCIENCE, 10, 1, 43, 51, Mar. 2016, [Peer-reviewed]
English, Scientific journal - Observations of frazil ice formation and sediment upward transport off the northeast coast of Sakhalin
Ito, M, K. I. Ohshima, J. Nishioka, Y. Kusumoto, Y. Fukamachi
Proceedings of the 31th International Symposium on Okhotsk Sea & Sea Ice, 124, 127, Feb. 2016
English, International conference proceedings - A wind-driven, hybrid latent and sensible heat coastal polynya off Barrow, Alaska
Daisuke Hirano, Yasushi Fukamachi, Eiji Watanabe, Kay I. Ohshima, Katsushi Iwamoto, Andrew R. Mahoney, Hajo Eicken, Daisuke Simizu, Takeshi Tamura
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS, 121, 1, 980, 997, Jan. 2016, [Peer-reviewed]
English, Scientific journal - Water properties, heat and volume fluxes of Pacific water in Barrow Canyon during summer 2010
Motoyo Itoh, Robert S. Pickart, Takashi Kikuchi, Yasushi Fukamachi, Kay I. Ohshima, Daisuke Simizu, Kevin R. Arrigo, Svein Vagle, Jianfeng He, Carin Ashjian, Jeremy T. Mathis, Shigeto Nishino, Carolina Nobre
DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS, 102, 43, 54, Aug. 2015, [Peer-reviewed]
English, Scientific journal - The role of turbulent mixing in the modified Shelf Water overflows that produce Cape Darnley Bottom Water
Daisuke Hirano, Yujiro Kitade, Kay I. Ohshima, Yasushi Fukamachi
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS, 120, 2, 910, 922, Feb. 2015, [Peer-reviewed]
English, Scientific journal - Taking a look at both sides of the ice: comparison of ice thickness and drift speed as observed from moored, airborne and shore-based instruments near Barrow, Alaska
Andrew R. Mahoney, Hajo Eicken, Yasushi Fukamachi, Kay I. Ohshima, Daisuke Simizu, Chandra Kambhamettu, M. V. Rohith, Stefan Hendricks, Joshua Jones
ANNALS OF GLACIOLOGY, 56, 69, 363, 372, 2015, [Peer-reviewed]
English, Scientific journal - Observations of supercooled water and frazil ice formation in an Arctic coastal polynya from moorings and satellite imagery
Masato Ito, Kay I. Ohshima, Yasushi Fukamachi, Daisuke Simizu, Katsushi Iwamoto, Yoshimasa Matsumura, Andrew R. Mahoney, Hajo Eicken
ANNALS OF GLACIOLOGY, 56, 69, 307, 314, 2015, [Peer-reviewed]
English, Scientific journal - A Numerical Investigation of Formation and Variability of Antarctic Bottom Water off Cape Darnley, East Antarctica
Yoshihiro Nakayama, Kay I. Ohshima, Yoshimasa Matsumura, Yasushi Fukamachi, Hiroyasu Hasumi
JOURNAL OF PHYSICAL OCEANOGRAPHY, 44, 11, 2921, 2937, Nov. 2014, [Peer-reviewed]
English, Scientific journal - What drives the southward drift of sea ice in the Sea of Okhotsk?
Daisuke Simizu, Kay I. Ohshima, Jun Ono, Yasushi Fukamachi, Genta Mizuta
PROGRESS IN OCEANOGRAPHY, 126, 33, 43, Aug. 2014, [Peer-reviewed]
English, Scientific journal - Antarctic Bottom Water production from the Vincennes Bay Polynya, East Antarctica
Yujiro Kitade, Keishi Shimada, Takeshi Tamura, Guy D. Williams, Shigeru Aoki, Yasushi Fukamachi, Fabien Roquet, Mark Hindell, Shuki Ushio, Kay I. Ohshima
GEOPHYSICAL RESEARCH LETTERS, 41, 10, 3528, 3534, May 2014, [Peer-reviewed]
English, Scientific journal - Estimation of wind drift current in the Soya Strait.
Zhang, W, N. Ebuchi, Y. Fukamachi, Y. Yoshikawa
Proceedings Second Ocean Radar Conference for Asia, 68, 71, Apr. 2014
English, International conference proceedings - Antarctic Bottom Water production by intense sea-ice formation in the Cape Darnley polynya
Kay I. Ohshima, Yasushi Fukamachi, Guy D. Williams, Sohey Nihashi, Fabien Roquet, Yujiro Kitade, Takeshi Tamura, Daisuke Hirano, Laura Herraiz-Borreguero, Iain Field, Mark Hindell, Shigeru Aoki, Masaaki Wakatsuchi
Nature Geoscience, 6, 3, 235, 240, Mar. 2013, [Peer-reviewed]
English, Scientific journal - A method for predicting the occurrence of paralytic shellfish poisoning along the coast of Hokkaido in the Okhotsk Sea in summer
Hiroshi Shimada, Mayumi Sawada, Iori Tanaka, Hiroki Asami, Yasushi Fukamachi
FISHERIES SCIENCE, 78, 4, 865, 877, Jul. 2012, [Peer-reviewed]
English, Scientific journal - A treatise on frequency spectrum of drift ice velocity
Matti Lepparanta, Annu Oikkonen, Kunio Shirasawa, Yasushi Fukamachi
COLD REGIONS SCIENCE AND TECHNOLOGY, 76-77, 83, 91, Jun. 2012, [Peer-reviewed]
English, Scientific journal - Continuous observation of the Soya Warm Current by HF ocean radar since 2003.
Ebuchi, N, Y. Fukamachi, K. I. Ohshima, M. Wakatsuchi
Proceedings of First Ocean Radar Conference for Asia, 82, 86, May 2012
English, Scientific journal - Coastal landfast sea ice decay and breakup in northern Alaska: Key processes and seasonal prediction
Chris Petrich, Hajo Eicken, Jing Zhang, Jeremy Krieger, Yasushi Fukamachi, Kay I. Ohshima
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS, 117, doi:10.1029/2011JC007339, Feb. 2012, [Peer-reviewed]
English, Scientific journal - Enhancement of Sea Ice Drift due to the Dynamical Interaction between Sea Ice and a Coastal Ocean
Yoshihiro Nakayama, Kay I. Ohshima, Yasushi Fukamachi
JOURNAL OF PHYSICAL OCEANOGRAPHY, 42, 1, 179, 192, Jan. 2012, [Peer-reviewed]
English, Scientific journal - Coastal landfast sea ice decay and breakup in northern Alaska: Key processes and seasonal prediction
Chris Petrich, Hajo Eicken, Jing Zhang, Jeremy Krieger, Yasushi Fukamachi, Kay I. Ohshima
Journal of Geophysical Research: Oceans, 117, 2, Blackwell Publishing Ltd, 2012, [Peer-reviewed]
English, Scientific journal - Sea-ice drift characteristics revealed by measurement of acoustic Doppler current profiler and ice-profiling sonar off Hokkaido in the Sea of Okhotsk
Yasushi Fukamachi, Kay I. Ohshima, Yuji Mukai, Genta Mizuta, Masaaki Wakatsuchi
ANNALS OF GLACIOLOGY, 52, 57, 1, 8, 2011, [Peer-reviewed]
English, Scientific journal - Characteristics of sea ice in the Okhotsk coastal polynyas revealed by satellites, ice-profiling sonar and digital camera observations
Sohey Nihashi, Naoto Ebuchi, Yasushi Fukamachi, Shuhei Takahashi
ANNALS OF GLACIOLOGY, 52, 57, 133, 139, 2011, [Peer-reviewed]
English, Scientific journal - Occurrence of blooms of the toxic dinoflagellate Alexandrium tamarense and paralytic shellfish poisoning infestation to scallops in the Okhotsk Sea off Hokkaido
Hiroshi Shimada, Mayumi Sawada, Iori Tanaka, Hiroki Asami, Yasushi Fukamachi
Nippon Suisan Gakkaishi (Japanese Edition), 77, 3, 439, 2011, [Peer-reviewed]
Japanese, International conference proceedings - Volume Transport in the Soya Strait during 2006-2008
Yasushi Fukamachi, Kay I. Ohshima, Naoto Ebuchi, Tadao Bando, Kazuya Ono, Minoru Sano
JOURNAL OF OCEANOGRAPHY, 66, 5, 685, 696, Oct. 2010, [Peer-reviewed]
English, Scientific journal - Propagation of subinertial variations in the Soya Warm Current revealed by HF ocean radars
Ebuchi, N, Y. Fukamachi, K. I. Ohshima
Proceedings of IGARSS 2010, 3051, 3054, Jul. 2010
English, Scientific journal - Strong export of Antarctic Bottom Water east of the Kerguelen plateau
Y. Fukamachi, S. R. Rintoul, J. A. Church, S. Aoki, S. Sokolov, M. A. Rosenberg, M. Wakatsuchi
NATURE GEOSCIENCE, 3, 5, 327, 331, May 2010, [Peer-reviewed]
English, Scientific journal - Southern Ocean Observing Systems (SOOS): Rationale and Strategy for Sustained Observations of the Southern Ocean
Rintoul, S. R, K. Speer, M. Sparrow, M. Meredith, E. Hoffmann, E. Fahrbach, C. Summerhayes, A. Worby, M. England, R. Bellerby, S. Speich, D. Costa, J. Hall, M. Hindell, G. Hosie, K. Stansfield, Y. Fukamachi, T. de Bruin, A. Naveira Garabato, K. Alberson, V. Ryabinin, H. C. Shin, S. Gladyshev
Proceedings of OceanObs '09: Sustained Ocean Observations and Information for Society (Vol. 2), WPP-306, 2010, [Peer-reviewed]
English, International conference proceedings - Thickness and production of sea ice in the Okhotsk Sea coastal polynyas from AMSR-E
Sohey Nihashi, Kay I. Ohshima, Takeshi Tamura, Yasushi Fukamachi, Sei-Ichi Saitoh
Journal of Geophysical Research: Oceans, 114, 10, Blackwell Publishing Ltd, 08 Oct. 2009, [Peer-reviewed]
English, Scientific journal - Thickness and production of sea ice in the Okhotsk Sea coastal polynyas from AMSR-E
Sohey Nihashi, Kay I. Ohshima, Takeshi Tamura, Yasushi Fukamachi, Sei-ichi Saitoh
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS, 114, C10, C10025, Oct. 2009, [Peer-reviewed]
English, Scientific journal - HF radar technology in the Sea of Okhotsk
Ebuchi, N, Y. Fukamachi, K.I. Ohshima, M. Wakatsuchi
PICES Science Report, 36, 197, 202, Sep. 2009, [Peer-reviewed], [Invited]
English, Scientific journal - Direct observations of sea-ice thickness and brine rejection off Sakhalin in the Sea of Okhotsk
Yasushi Fukamachi, Kunio Shirasawa, Anatoliy M. Polomoshnov, Kay I. Ohshima, Ervin Kalinin, Sohey Nihashi, Humfrey Melling, Genta Mizuta, Masaaki Wakatsuchi
CONTINENTAL SHELF RESEARCH, 29, 11-12, 1541, 1548, Jun. 2009, [Peer-reviewed]
English, Scientific journal - Subinertial and seasonal variations in the Soya Warm Current revealed by HF ocean radars, coastal tide gauges, and bottom-mounted ADCP
Naoto Ebuchi, Yasushi Fukamachi, Kay I. Ohshima, Masaaki Wakatsuchi
JOURNAL OF OCEANOGRAPHY, 65, 1, 31, 43, Feb. 2009, [Peer-reviewed]
English, Scientific journal - Seasonal and subinertial variations in the Soya Warm Current revealed by HF radars, coastal tide gauges, and bottom-mounted ADCP.
Ebuchi, N, Y. Fukamachi, K.I. Ohshima, M. Wakatsuchi
Proceedings of ISRS 2008, TB202, Oct. 2008
English, Scientific journal - Deep western boundary current and southern frontal systems of the Antarctic Circumpolar Current southeast of the Kerguelen Plateau
Shigeru Aoki, Nobuhiro Fujii, Shuki Ushio, Yasushi Yoshikawa, Shuichi Watanabe, Genta Mizuta, Yasushi Fukamachi, Masaaki Wakatsuchi
Journal of Geophysical Research: Oceans, 113, 8, Blackwell Publishing Ltd, 08 Aug. 2008, [Peer-reviewed]
English, Scientific journal - Volume transport of the Soya Warm Current revealed by bottom-mounted ADCP and ocean-radar measurement
Yasushi Fukamachi, Iori Tanaka, Kay I. Ohshima, Naoto Ebuchi, Genta Mizuta, Hideo Yoshida, Shiro Takayanagi, Masaaki Wakatsuchi
JOURNAL OF OCEANOGRAPHY, 64, 3, 385, 392, Jun. 2008, [Peer-reviewed]
English, Scientific journal - Diurnal coastal-trapped waves on the eastern shelf of Sakhalin in the Sea of Okhotsk and their modification by sea ice
Jun Ono, Kay I. Ishima, Genta Mizuta, Yasushi Fukamachi, Masaaki Wakatsuchi
CONTINENTAL SHELF RESEARCH, 28, 6, 697, 709, Apr. 2008, [Peer-reviewed]
English, Scientific journal - Vertical material flux under seasonal sea ice in the Okhotsk Sea north of Hokkaido, Japan
Takehiko Hiwatari, Kunio Shirasawa, Yasushi Fukamachi, Ryuichi Nagata, Tomoyoshi Koizumi, Hiroshi Koshikawa, Kunio Kohata
Polar Science, 2, 1, 41, 54, Mar. 2008, [Peer-reviewed]
English, Scientific journal - Variations in the Soya Warm Current observed by HF ocean radar, coastal tide gauges and satellite altimetry.
Ebuchi, N, Y. Fukamachi, K.I. Ohshima, K. Shirasawa, M. Wakatsuchi
Proceedings of ISRS2008PORSEC (CD-ROM), TA1001, Nov. 2006
English, Scientific journal - Sea ice thickness in the southwestern Sea of Okhotsk revealed by a moored ice-profiling sonar
Yasushi Fukamachi, Genta Mizuta, Kay I. Ohshima, Takenobu Toyota, Noriaki Kimura, Masaaki Wakatsuchi
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS, 111, C9, doi:10.1029/2005JC003327, Sep. 2006, [Peer-reviewed]
English, Scientific journal - Observation of the Soya Warm Current combining HF ocean radar with coastal tide gauges and satellite altimetry.
Ebuchi, N, Y. Fukamachi, K.I. Ohshima, K. Shirasawa, M. Wakatsuchi
Proceedings of IGARSS 2006, 1860, 1863, Jul. 2006
English, Scientific journal - Amplification of diurnal tides over Kashevarov Bank in the Sea of Okhotsk and its impact on water mixing and sea ice
J Ono, KI Ohshima, G Mizuta, Y Fukamachi, M Wakatsuchi
DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS, 53, 3, 409, 424, Mar. 2006, [Peer-reviewed]
English, Scientific journal - Observation of the Soya Warm Current using HF ocean radar
N Ebuchi, Y Fukamachi, KI Ohshima, K Shirasawa, M Ishikawa, T Takatsuka, T Daibo, M Wakatsuchi
JOURNAL OF OCEANOGRAPHY, 62, 1, 47, 61, Feb. 2006, [Peer-reviewed]
English, Scientific journal - The variability of the East Sakhalin Current induced by winds over the continental shelf and slope
G Mizuta, KI Ohshima, Y Fukamachi, M Wakatsuchi
JOURNAL OF MARINE RESEARCH, 63, 6, 1017, 1039, Nov. 2005, [Peer-reviewed]
English, Scientific journal - A generation mechanism for mesoscale eddies in the Kuril Basin of the Okhotsk Sea: Baroclinic instability caused by enhanced tidal mixing
KI Ohshima, Y Fukamachi, T Mutoh, M Wakatsuchi
JOURNAL OF OCEANOGRAPHY, 61, 2, 247, 260, Apr. 2005, [Peer-reviewed]
English, Scientific journal - Seasonal variation of the Soya Warm Current observed by HF ocean radar.
Ebuchi, N, Y. Fukamachi, K.I. Ohshima, K. Shirasawa, M. Ishikawa, T. Takatsuka, T. Daibo, M. Wakatsuchi
Proceedings of ISRS 2004, 183, 187, Oct. 2004
English, Scientific journal - Transport and modification processes of dense shelf water revealed by long-term moorings off Sakhalin in the Sea of Okhotsk
Yasushi Fukamachi, Genta Mizuta, Kay I. Ohshima, Lynne D. Talley, Stephen C. Riser, Masaaki Wakatsuchi
Journal of Geophysical Research C: Oceans, 109, 9, 1, 16, 15 Sep. 2004, [Peer-reviewed]
English, Scientific journal - Biogenic and lithogenic particle fluxes in the western region of the Sea of Okhotsk: Implications for lateral material transport and biological productivity
Takeshi Nakatsuka, Tomoaki Fujimune, Chisato Yoshikawa, Shinichiro Noriki, Kimitaka Kawamura, Yasushi Fukamachi, Genta Mizuta, Masaaki Wakatsuchi
Journal of Geophysical Research C: Oceans, 109, 9, 1, 15, 15 Sep. 2004, [Peer-reviewed]
English, Scientific journal - Observation of the Soya Warm Current using HF ocean radar.
Ebuchi, N, Y. Fukamachi, K.I. Ohshima, K. Shirasawa, M. Ishikawa, T. Takatsuka, T. Daibo, M. Wakatsuchi
Proceedings of IGARSS 2004, 1175, 1178, Sep. 2004
English, Scientific journal - Biogenic and lithogenic particle fluxes in the western region of the Sea of Okhotsk: Implications for lateral material transport and biological productivity
T Nakatsuka, T Fujimune, C Yoshikawa, S Noriki, K Kawamura, Y Fukamachi, G Mizuta, M Wakatsuchi
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS, 109, C9, doi:10.1029/2003JC001908, Aug. 2004, [Peer-reviewed]
English, Scientific journal - Transport and modification processes of dense shelf water revealed by long-term moorings off Sakhalin in the Sea of Okhotsk
Y Fukamachi, G Mizuta, KI Ohshima, LD Talley, SC Riser, M Wakatsuchi
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS, 109, C9, doi:10.1029/2003JC001906, Jul. 2004, [Peer-reviewed]
English, Scientific journal - Winter mixed layer and its yearly variability under sea ice in the southwestern part of the Sea of Okhotsk
G Mizuta, KI Ohshima, Y Fukamachi, M Itoh, M Wakatsuchi
CONTINENTAL SHELF RESEARCH, 24, 6, 643, 657, Apr. 2004
English, Scientific journal - Sverdrup balance and the cyclonic gyre in the Sea of Okhotsk
KI Ohshima, D Simizu, M Itoh, G Mizuta, Y Fukamachi, SC Riser, M Wakatsuchi
JOURNAL OF PHYSICAL OCEANOGRAPHY, 34, 2, 513, 525, Feb. 2004, [Peer-reviewed]
English, Scientific journal - Structure and seasonal variability of the East Sakhalin Current
G Mizuta, Y Fukamachi, KI Ohshima, M Wakatsuchi
JOURNAL OF PHYSICAL OCEANOGRAPHY, 33, 11, 2430, 2445, Nov. 2003, [Peer-reviewed]
English, Scientific journal - Variability of sea-ice draft off Hokkaido in the Sea of Okhotsk revealed by a moored ice-profiling sonar in winter of 1999
Y Fukamachi, G Mizuta, KI Ohshima, H Melling, D Fissel, M Wakatsuchi
GEOPHYSICAL RESEARCH LETTERS, 30, 7, doi:10.1029/2002GL016197, Apr. 2003, [Peer-reviewed]
English, Scientific journal - Near-surface circulation and tidal currents of the Okhotsk Sea observed with satellite-tracked drifters
KI Ohshima, M Wakatsuchi, Y Fukamachi, G Mizuta
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS, 107, C11, doi:10/1029/2001JC001005, Nov. 2002, [Peer-reviewed]
English, Scientific journal - Deriving sea-ice thickness and ice types in the Sea of Okhotsk using dual-frequency airborne SAR (Pi-SAR) data
T Matsuoka, S Uratsuka, M Satake, A Nadai, T Umehara, H Maeno, H Wakabayashi, F Nishio, Y Fukamachi
ANNALS OF GLACIOLOGY, VOL 34, 2002, 34, 429, 434, 2002, [Peer-reviewed]
English, Scientific journal - Winter oceanographic conditions in the southwestern part of the Okhotsk sea and their relation to sea ice
Kay I. Ohshima, Genta Mizuta, Motoyo Itoh, Yasushi Fukamachi, Tatsuro Watanabe, Yasushi Nabae, Koukichi Suehiro, Masaaki Wakatsuchi
Journal of Oceanography, 57, 4, 451, 460, 2001, [Peer-reviewed]
English, Scientific journal - Seasonal variability of bottom water properties off Adelie Land, Antarctica
Y Fukamachi, M Wakatsuchi, K Taira, S Kitagawa, S Ushio, A Takahashi, K Oikawa, T Furukawa, H Yoritaka, M Fukuchi, T Yamanouchi
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS, 105, C3, 6531, 6540, Mar. 2000, [Peer-reviewed]
English, Scientific journal - Mesoscale ice features in the summer marginal ice zone off East Queen Maud Land observed in NOAA AVHRR imagery
Fukamachi, Y, K. I. Ohshima, T. Ishikawa
Antarctic Research Series, 74, 317, 324, 1998, [Peer-reviewed]
English, Scientific journal - INSTABILITY OF DENSITY FRONTS IN LAYER AND CONTINUOUSLY STRATIFIED MODELS
Y FUKAMACHI, JP MCCREARY, JA PROEHL
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS, 100, C2, 2559, 2577, Feb. 1995, [Peer-reviewed]
English, Scientific journal - A NONLINEAR MECHANISM FOR MAINTAINING COASTALLY TRAPPED EASTERN BOUNDARY CURRENTS
JP MCCREARY, Y FUKAMACHI, P LU
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS, 97, C4, 5677, 5692, Apr. 1992, [Peer-reviewed]
English, Scientific journal - A NUMERICAL INVESTIGATION OF JETS AND EDDIES NEAR AN EASTERN OCEAN BOUNDARY
JP MCCREARY, Y FUKAMACHI, PK KUNDU
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS, 96, C2, 2515, 2534, Feb. 1991, [Peer-reviewed]
English, Scientific journal
Other Activities and Achievements
- Comprehensive Arctic research efforts by integrating field of study-HAI-FES
KODAMA Yuji, OTSUKA Natsuhiko, SAUNAVAARA Juha, OHNISHI Fujio, UTO Shotaro, FUKAMACHI Yasushi, Proceedings of the International Symposium on Okhotsk Sea & Polar Oceans, 37th, 2023 - 北極海ノースウィンド深海平原における海氷厚の季節変動
上野威, 上野洋路, 上野洋路, 伊東素代, 渡邉英嗣, 小野寺丈尚太郎, 川口悠介, 藤尾伸三, 守家衣利加, 深町康, 日本海洋学会大会講演要旨集(Web), 2022, 2022 - Long-term Measurement of Temperature, Salinity and Ocean Current in the Bowdoin Fjord in northwestern Greenland
Fujishi, Y, Y. Fukamachi, N. Kanna, S. Sugiyama, Annual Report on Snow and Ice Studies in Hokkaido, 38, 15, 18, Sep. 2019
Japanese, Report scientific journal - Development of monitoring buoy system for polar oceans-field experiment in the Okhotsk Sea-
青木茂, 市川雅明, 市川雅明, 小野数也, 深町康, 深町康, 深町康, 大島慶一郎, 大島慶一郎, 中川敏彦, 小林研吾, 小竹正人, 小竹正人, 小澤知史, 海洋理工学会誌(Web), 25, 1, 29‐34(J‐STAGE), 2019
Japanese - 氷河融氷水の流出が駆動するグリーンランドフィヨルドにおける栄養塩輸送過程
漢那直也, 杉山慎, 杉山慎, 大橋良彦, 榊原大貴, 西沢文吾, 浅地泉, 深町康, 深町康, 日本海洋学会大会講演要旨集, 2017, 274, Sep. 2017
Japanese - ビンセネス湾沖における巨大係留系による長期観測
北出裕二郎, 嶋田啓資, 溝端浩平, 青木茂, 田村岳史, 千手智晴, 深町康, 大島慶一郎, 日本海洋学会大会講演要旨集, 2017, 2017 - Effect of turbid glacial meltwater discharge on marine ecosystems in the fjord of Bowdoin Glacier in northwestern Greenland
漢那直也, 杉山慎, 杉山慎, 大橋良彦, 榊原大貴, 西沢文吾, 浅地泉, 深町康, 深町康, 阿部義之, 山口篤, 雪氷研究大会講演要旨集(Web), 2017, 0, 286(J‐STAGE), 286, 2017
公益社団法人 日本雪氷学会/日本雪工学会, Japanese - Study on prediction of paralytic shellfish poisoning along the coast of Hokkaido in the Okhotsk Sea in summer
田中 伊織, 嶋田 宏, 深町 康, Aquabiology, 33, 5, 477, 482, Oct. 2011
生物研究社, Japanese - 南大洋の深層水形成と海氷過程 海鷹丸により観測されたケープダンレー沖の南極底層水と海洋微細構造の特徴
北出裕二郎, 平野大輔, 大島慶一郎, 深町康, 月刊海洋, 29, 36, 01 Jun. 2010
Japanese - 未知の南極底層水生成域の発見と今後の観測に向けて―ケープダンレープロジェクト―
大島慶一郎, 深町康, 青木茂, 清水大輔, 田村岳史, 牛尾収輝, 橋田元, 北出裕二郎, 若土正暁, 月刊海洋 総特集「南大洋の深層水形成と海氷過程」, 54、12-20, 2010 - サハリン東岸沖での長期係留観測結果 : 高密度陸棚水の流量見積もり
深町 康, 水田 元太, 大島 慶一, 若土 正暁, Otsuchi marine science = 東京大学海洋研究所大槌臨海研究センター研究報告, 27, 27, 70, 71, 29 Mar. 2002
平成13年度共同利用研究集会「北太平洋北西部とその縁辺海の水塊変動と循環」(2001年8月21日, 研究代表者:岩坂直人)講演要旨, 東京大学, Japanese - Winter oceanographic conditions in the southwestern part of the Okhotsk Sea and their relation to sea ice
Kay I. Ohshima, Genta Mizuta, Motoyo Itoh, Yasushi Fukamachi, Tatsuro Watanabe, Yasushi Nabae, Koukichi Suehiro, Masaaki Wakatsuchi, 海の研究 = Umi no Kenkyu (Oceanography in Japan), 11, 2, 368, 368, 05 Mar. 2002
オホーツク海南西部において,1997年2月砕氷船「そうや」により,海洋と海氷の観測を行った。この観測によって,ほぼ結氷温度にある海洋混合層が300mの深さにまで達しているのが見つかった。これは,今まで考えられていたよりもずっと深い。この深い海洋混合層はこの海域で形成されたのではなく,サハリン東岸沖で形成され,それが東サハリン海流によって陸棚斜面に沿って移流されたものであると考えられる。また,これらと一緒に平均0.6mの厚い一年氷も運ばれていた。この鉛直に一様な冬季水は,周りの水と混合し,この海域の表層水をより高塩化し東サハリン海流水の性質を失わせる。一方,100~300m深の水は逆に,オホーツク海中層に特徴的な低塩,低温,高酸素の海水に変質される。海洋構造と熱収支解析から,氷縁域によく見られる新生氷帯は,まず厚い海氷が移流され,それが融解することによって潜熱を奪って表面水が冷却される,という事前の条件があった上で作られることが示唆された。, Japanese - アルゴス海洋漂流ブイによるオホーツク海と親潮域の循環と潮流特性
大島 慶一郎, 若土 正暁, 深町 康, 水田 元太, Otsuchi marine science = 東京大学海洋研究所大槌臨海研究センター研究報告, 26, 26, 92, 92, 29 Mar. 2001
平成12年度共同利用研究集会「北太平洋北西部とその縁辺海の水塊変動と循環」(2000年8月24日~25日, 研究代表者:岩坂直人)講演要旨, 東京大学, Japanese - Estimation of dense shelf water volume transport using long-term mooring data off the east coast of Sakhalin
FUKAMACHI Y., Proc. of Int. Symp. oOeAtmosphere-Ocean-Cryosphere Interaction in the Sea of Okhotsk and Surrounding Environment, 36, 37, 2001
Hokkaido Univ. - ブッソル海峡を通りオホーツク海を横切る断面でみた体積・塩分・溶存酸素輸送量収支 1998年8月クロモフ号観測結果から
河野時広, 水田元太, 大島慶一郎, 深町康, 伊東素代, GLADYSHEV S V, 滝沢隆俊, 若土正暁, 日本海洋学会大会講演要旨集, 1999, 1999 - MESOSCALE ICE-OCEAN FEATURES IN THE MARGINAL ICE ZONE OFF SYOWA STATION OBSERVED IN NOAA AVHRR IMAGERY
FUKAMACHI Yasushi, OHSHIMA Kay I., ISHIKAWA Takayuki, Proceedings of the NIPR Symposium on Polar Meteorology and Glaciology, 11, 266, 266, Nov. 1997
Mesoscale ice-ocean features off Syowa Station are examined using NOAA advanced very high resolution radiometer (AVHRR) data during the summers of 1987 and 1988. Visible-band (channel 2) and infrared-band (channel 4) images are used to examine ice and sea surface temperature distributions, respectively. As the melting season progresses, mesoscale ice tongues and eddies are found in the marginal ice zone. The growth of these features is not correlated with the wind field in this area. Comparison between visible and infrared images reveals that the mesoscale ice features are accompanied by corresponding patterns of cold water off the ice edge. Namely, regions of cold water extend off the ice tongues and eddies. This suggests that advection of ice by ocean currents generates the mesoscale features., National Institute of Polar Research, English
Lectures, oral presentations, etc.
- サハリン沖係留観測に基づく高精度なAMSR-E薄氷厚アルゴリズムの開発
柏瀬陽彦, 大島慶一郎, 深町康, 二橋創平, 田村岳史
海洋学会秋季大会 富山, 28 Sep. 2019, Japanese, Oral presentation
[Domestic Conference] - カービング氷河の融解に伴う海洋への鉄供給過程
漢那直也, 杉山慎, 深町康, 野村大樹, 西岡純
海洋学会秋季大会 富山, 26 Sep. 2019, Japanese, Oral presentation
[Domestic Conference] - グリーンランド北西部ボードインフィヨルドにおける氷河近傍での係留観測
藤支良貴, 深町康, 漢那直也, 杉山慎
海洋学会秋季大会 富山, 26 Sep. 2019, Japanese, Oral presentation
[Domestic Conference] - グリーンランド北西部ボードイン氷河近傍の海洋における水温,塩分,流速の長期観測
藤支 良貴, 深町 康, 漢那 直也, 杉山 慎
雪氷学会北海道支部研究発表会, 10 May 2019, Japanese, Oral presentation
[Domestic Conference] - Interactions between sea-ice drift and near-inertial internal waves in the Northwind Abyssal Plain, Arctic Ocean: year-round mooring observations
Yusuke Kawaguchi
EGU General Assembly 2019, 10 Apr. 2019, English, Oral presentation
[International presentation] - Mooring measurement of sea ice and ocean in the northeastern coastal Chukchi Sea from 2009
Fukamachi, Y
Japan-U.S. Arctic Science Collaboration “Reflections on the Past Two Decades and Future Opportunities”, 05 Mar. 2019, English, Invited oral presentation
[Invited], [International presentation] - HU-UAF collaboration over the past 20 years in the Arctic and Sub-Arctic
Saitoh, S, Y. Fukamachi
Japan-U.S. Arctic Science Collaboration “Reflections on the Past Two Decades and Future Opportunities”, 04 Mar. 2019, English, Oral presentation
[International presentation] - Bio-related material cycle in a coastal polynya observed with moored acoustic and optical instruments in the northeastern Chukchi Sea
Masato Ito, Kay I. Ohshima, Yasushi Fukamachi, Hajo Eicken, Andrew R. Mahoney, Joshua Jones, Toru Takatsuka
The Ninth Symposium on Polar Science, 05 Dec. 2018, English, Oral presentation
[International presentation] - チュクチ海ポリニヤ域における音響・光学測器による物質循環過程の観測
伊藤優人, 大島慶一郎, 深町康, Hajo Eicken,Andrew, R. Mahoney, Joshua Jones
2018年度日本海洋学会秋季大会, 26 Sep. 2018, Japanese, Oral presentation
東京, [Domestic Conference] - グリーンランド北西部におけるカービング氷河前縁フィヨルドの海水特性
漢那直也, 杉山慎, 榊原大貴, 深町康, 野村大樹
2018年度日本海洋学会秋季大会, 26 Sep. 2018, Japanese, Oral presentation
東京, [Domestic Conference] - グリーンランド北西部ボードウィンフィヨルドにおける海洋観測
藤支良貴, 杉山慎, 漢那直也, 深町康
雪氷研究大会, 10 Sep. 2018, 札幌, Japanese, Poster presentation
地震の影響で中止, [Domestic Conference] - 北海道と海氷:海氷の減少とその影響
深町康
バイオミメティクス市民セミナー(第79回)「北海道とバイオミメティクスを考える その3 寒冷地とバイオミメティクス」, 07 Jul. 2018, Japanese, Public discourse
札幌, [Domestic Conference] - Effects of glacial meltwater discharge on surface water pCO2 and air–sea CO2 flux in Bowdoin Fjord in northwestern Greenland
Daiki Nomura, N. Kanna, S. Yunoki, D. Sakakibara, Y. Fukamachi, T. Hirawake, S. Sugiyama
Polar 2018, 20 Jun. 2018, English, Poster presentation
Davos, Switzerland, [International presentation] - Monitoring of the Soya Warm Current by HF Ocean Radars since 2003
Naoto Ebuchi, Yasushi Fukamachi, Kay I. Ohshima, Toru Takatsuka, Masao Ishikawa, Kunio Shirasawa, Masaaki Wakatsuchi
The 4th Ocean Radar Conference for Asia-Pacific, 02 Jun. 2018, English, Oral presentation
Naha, Japan, [International presentation] - An evidence of a subglacial freshwater discharge into a fjord at the boundary of Bowdoin Glacier, northwestern Greenland
KANNA, Naoya, SUGIYAMA, Shin, SAKAKIBARA, Daiki, FUKAMACHI, Yasushi, NOMURA Daiki, FUKUMOTO, Sungo, PODOLSKIY, Evgeniy
JpGU Meeting 2018, 24 May 2018, Japanese, Poster presentation
Chiba, Japan, [Domestic Conference] - チュクチ海北東部沿岸域における海氷厚の経年変動
深町康, 大島慶一郎, Andrew, R. Mahoney, Hajo Eicken, 清水大輔, 岩本勉之, 守家衣利加, 高塚徹, Joshua Jones
ArCS全体会合, 10 May 2018, Japanese, Poster presentation
横浜, [Domestic Conference] - George, Alaska coastal sea ice in the new millennium: Findings from the Seasonal Ice Zone Observing Network and implications for sustained autonomous observations of a rapidly changing Arctic
Eicken, Mahoney, Lee, Johnson, Jones, Ohshima, Fukamachi
2018 Ocean Sciences Meeting, 14 Feb. 2018, English, Poster presentation
Portland, USA, [International presentation] - Transports of macronutrient and inorganic carbon to surface waters by subglacial meltwater plume in Bowdoin Fjord in northwest Greenland
N. Kanna, S. Sugiyama, Y. Ohashi, D. Sakakibara, B. Nishizawa, I. Asaji, Y. Fukamachi, D. Nomura
2018 Ocean Sciences Meeting, 12 Feb. 2018, English, Oral presentation
Portland, USA, [International presentation] - High Ice Production in Antarctic Coastal Polynyas and Its Possible Linkage to Material Cycle and Biological Productivity (Invited)
Kay I. Ohshima, Masato Ito, Sohey Nihashi, Yasushi Fukamachi, Kazuki Nakata, Daisuke Simizu
2018 Ocean Sciences Meeting, 12 Feb. 2018, English, Poster presentation
Portland, USA, [International presentation] - Seasonal variability of near-inertial internal waves in the Northwind Abyssal Plain, Arctic Ocean
Y. Kawaguchi, M. Itoh, Y. Fukamachi, E. Moriya, N. Onodera, T. Kikuchi
Fifth International Symposium on Arctic Research (ISAR-5), 18 Jan. 2018, English, Oral presentation
Tokyo, [International presentation] - Sea-ice thickness from moored ice-profiling sonar in the Canada Basin, Arctic Ocean
Motoyo Itoh, Yasushi Fukamachi, Noriaki Kimura, Richar, A. Krishfield, Takashi Kikuchi, Erika Moriya, Jonaotaro Onodera, Naomi Harada
Fifth International Symposium on Arctic Research (ISAR-5), 16 Jan. 2018, English, Poster presentation
Tokyo, [International presentation] - Continuous Sea-ice Thickness Measurement in the Northeastern Coastal Chukchi Sea from 2009
Y. Fukamachi, K. I. Ohshima, A. R. Mahoney, H. Eicken, D. Simizu, K. Iwamoto, E. Moriya, T. Takatsuka, J. Jones
Fifth International Symposium on Arctic Research (ISAR-5), 16 Jan. 2018, English, Oral presentation
Tokyo, [International presentation] - Sea-ice thickness from moored ice-profiling sonar in the Canada Basin, Arctic Ocean
Motoyo Itoh, Yasushi Fukamachi, Noriaki Kimura, Richar, A. Krishfield, Takashi Kikuchi, Erika Moriya, Jonaotaro Onodera, Naomi Harada
Arctic Change 2017, 11 Dec. 2017, English, Oral presentation
Québec, Canada, [International presentation] - Mooring measurement in Bowdoin Fjord in northwestern Greenland
Yasushi Fukamachi, Naoya Kanna, Shin Sugiyama, Yoshihiko Ohashi, Daiki Sakakibara, Daiki Nomura
The 8th Symposium on Polar Science, 05 Dec. 2017, English, Poster presentation
Tachikawa, Japan, [International presentation] - 急激に変化する北極海の環境とその社会への影響
深町康
北海道大学低温科学研究所公開講座, 06 Nov. 2017, Japanese, Public discourse
札幌, [Domestic Conference] - 係留観測による北極海カナダ海盆の海氷厚の季節変動
伊東素代, 深町康, 木村詞明, R.A. Krishfield, 菊地隆, 守家衣利加, 小野寺丈尚太郎, 原田尚美
日本海洋学会2017年度秋季大会, 16 Oct. 2017, Japanese, Oral presentation
仙台, [Domestic Conference] - グリーンランド北西部Bowdoinフィヨルドにおける氷河流出水の挙動の時間発展
大橋良彦, 青木茂, 松村義正, 杉山慎, 漢那直也, 榊原大貴, 深町康
日本海洋学会2017年度秋季大会, 16 Oct. 2017, Japanese, Oral presentation
仙台, [Domestic Conference] - 氷河融氷水の流出が駆動するグリーンランドフィヨルドにおける栄養塩輸送過程
漢那直也, 杉山慎, 大橋良彦, 榊原大貴, 西沢文吾, 浅地泉, 深町康
日本海洋学会2017年度秋季大会, 14 Oct. 2017, Japanese, Poster presentation
仙台, [Domestic Conference] - カービング氷河の高濁度融解水流出がフィヨルド生態系へ与える影響
漢那直也, 杉山慎, 大橋良彦, 榊原大貴, 西沢文吾, 浅地泉, 深町康, 阿部義之, 山口篤
日本雪氷学会 雪氷研究大会2017, 26 Sep. 2017, Japanese, Poster presentation
十日町, [Domestic Conference] - Sea Ice Velocity Observation by HF Ocean Radar
W. Zhang, N. Ebuchi, Y. Fukamachi, B. Emery
International Radiowave Oceanography Workshop, 21 Sep. 2017, English, Oral presentation
Lüneburg, Germany, [International presentation] - グリーンランド北西部ボードイン氷河前縁部における海洋観測
漢那直也, 杉山慎, 榊原大貴, 深町康, 野村大樹, 福本俊吾, 山崎新太郎, E. Podolskiy
北海道大学低温科学研究所共同利用集会, 21 Aug. 2017, Japanese, Oral presentation
札幌, [Domestic Conference] - The Suppression Of Antarctic Bottom Water Formation By Melting Ice Shelves In Prydz Bay
Guy WILLIAMS, Laura HERRAIZ-BORREGUERO, Fabien ROQUET, Takeshi TAMURA, Kay OHSHIMA, Yasushi FUKAMACHI, Alexander FRASER, Libao GAO, Hongxia CHEN, Clive MCMAHON, Robert HARCOURT, Mark HINDELL
14th Annual Meeting of Asia Oceania Geosciences Society, 11 Aug. 2017, English, Poster presentation
Singapore, [International presentation] - easonal variability of near-inertial internal waves and its kinetic energy in the ice-diminishing Arctic Ocean
Yusuke Kawaguchi, Motoyo Itoh, Takashi Kikuchi, Jonaotaro Onodera, Naomi Harada, Yasushi Fukamachi, Erika Moriya
JpGU-AGU Joint Meeting 2017, 24 May 2017, English, Poster presentation
Chiba, Japan, [International presentation] - Effect of subglacial meltwater plume formation on phytoplankton growth in the fjord of Bowdoin Glacier in northwest Greenland
Naoya Kanna, Shin Sugiyama, Yoshihiko Ohashi, Daiki Sakakibara, Bungo Nishizawa, Izumi Asaji, Yasushi Fukamachi
JpGU-AGU Joint Meeting 2017, 24 May 2017, English, Poster presentation
Chiba, Japan, [International presentation] - Abrupt changes and interactions of polar oceans and ice sheets as a research subject in Master Plan 2020
Shin Sugiyama, Yasushi Fukamachi, Kay I. Ohshima, Shigeru Aoki, Teruo Aoki, Michiyo Yamamoto-Kawai, Takashi Kikuchi, Daisuke Hirano
JpGU-AGU Joint Meeting 2017, 24 May 2017, English, Oral presentation
Chiba, Japan, [International presentation] - Subglacial meltwater discharge and its impact on water properties in Bowdoin Fjord, northwestern Greenland
Yoshihiko Ohashi, Shigeru Aoki, Yoshimasa Matsumura, Shin Sugiyama, Naoya Kanna, Daiki Sakakibara, Yasushi Fukamachi
JpGU-AGU Joint Meeting 2017, 24 May 2017, English, Oral presentation
Chiba, Japan, [International presentation] - Variability of sea-ice thickness in the northeastern coastal Chukchi Sea revealed by a moored ice-profiling sonar
Fukamachi Yasushi, Simizu Daisuke, Ohshima Kay, Eicken Hajo, Mahoney Andrew, Iwamoto Katsushi, Moriya Erika, Nihashi Sohey
JpGU-AGU Joint Meeting 2017, 24 May 2017, English, Oral presentation
Chiba, Japan, [Invited], [International presentation] - 北極海の海氷消失が及ぼす北極海の乱流化について – ノースウインド深海平原における係留系データの解析 -
川口悠介, 伊東素代, 菊地隆, 小野寺丈尚太郎, 原田尚美, 深町康, 守家衣利加
ブルーアース2017, 02 Mar. 2017, Japanese, Poster presentation
東京, [Domestic Conference] - Sea ice field course at Saroma Lagoon and Okhotsk Sea by International Antarctic Institute
Aoki, S, Fukamachi, Y, Toyota, T, Hirawake, T, Mizuta, G, Matsumura, Y, Ohshima, K. I
The 32nd International Symposium on the Okhotsk Sea & Polar Oceans, 22 Feb. 2017, English, Oral presentation
Monbetsu, Japan, [International presentation] - Underwater frazil ice formation in the Sakhalin polynya
Ito, M, Ohshima, K. I, Fukamachi, Y, Shirasawa, K
The 32nd International Symposium on the Okhotsk Sea & Polar Oceans, 21 Feb. 2017, English, Oral presentation
Monbetsu, Japan, [International presentation] - Variability of sea-ice thickness in the northeastern coastal Chukchi Sea revealed by a moored ice-profiling sonar
Fukamachi, Y, Simizu, D, Ohshima, K. I, Eicken, H, Mahoney, A. R, Iwamoto, K, Moriya, E, Nihashi, S
The 32nd International Symposium on the Okhotsk Sea & Polar Oceans, 21 Feb. 2017, English, Oral presentation
Monbetsu, Japan, [International presentation] - Turbid meltwater discharge and its impact on phytoplankton growth in the fjord of Bowdoin Glacier in northwest Greenland
Kanna, N, Sugiyama, S, Ohashi, Y, Sakakibara, D, Nishizawa, B, Asaji, I, Fukamachi, Y
Workshop on the Dynamics and Mass Budget of Arctic Glaciers & the IASC Network on Arctic Glaciology Annual Meeting, 23 Jan. 2017, English, Oral presentation
Bethel, USA, [International presentation] - Variability of sea-ice thickness in the northeastern coastal Chukchi Sea revealed by a moored ice-profiling sonar
Fukamachi, Y
Workshop on Sea Ice Remote Sensing and Modeling, 23 Jan. 2017, English, Oral presentation
Tokyo, [International presentation] - Landfast Sea Ice Breakouts: Stabilizing Ice Features, Oceanic and Atmospheric Forcing at Barrow, Alaska
Jones, J, Eicken, H, Manoney, A. R, Kambhamettu, R. MV, C, Fukamachi, Y, Ohshima, K. I, George, C
2016 AGU Fall Meeting, 15 Dec. 2016, English, Poster presentation
San Francisco, USA, [International presentation] - The observation of underwater frazil ice formation and upward sediment transport in an Arctic polynya in the Chukchi Sea
Ito, M, Ohshima, K. I, Fukamachi, Y, Simizu D, Mahoney, A. R, Eicken, H
2016 AGU Fall Meeting, 13 Dec. 2016, English, Oral presentation
San Francisco, USA, [International presentation] - Modeling glacial meltwater runoff process in Bowdoin Fjord, northwestern Greenland
Ohashi Yoshihiko, Aoki Shigeru, Matsumura Yoshimasa, Sugiyama Shin, Kanna Naoya, Sakakibara Daiki, Fukamachi Yasushi
The Seventh Symposium on Polar Science, 06 Dec. 2016, English, Poster presentation
Tachikawa, Japan, [International presentation] - Changes in seabird density relative to oceanographic gradients in the glacial fjord in northwestern Greenland
Nishizawa Bungo, Kanna Naoya, Ohashi Yoshihiko, Sakakibara Daiki, Asaji Izumi, Sugiyama Shin, Fukamachi Yasushi, Watanuki Yutaka
The Seventh Symposium on Polar Science, 02 Dec. 2016, English, Poster presentation
Tachikawa, Japan, [International presentation] - Turbid water and chlorophyll a distributions near the interface of the ocean and a tidewater glacier in northwest Greenland
Kanna Naoya, Sugiyama Shin, Ohashi Yoshihiko, Sakakibara Daiki, Nishizawa Bungo, Asaji Izumi, Fukamachi Yasushi
The Seventh Symposium on Polar Science, 02 Dec. 2016, English, Poster presentation
Tachikawa, Japan, [International presentation] - Interannual variabilties of fluxes in Barrow Canyon from 2010-2014 : results from the DBO-5 repeat section
Itoh Motoyo, Kikuchi Takashi, Fukamachi Yasushi, Pickart Robert, collaborators
2016 PAG Fall Meeting, 27 Oct. 2016, English, Oral presentation
Qingdao, China, [International presentation] - サハリンポリニヤにおける過冷却水とフラジルアイスの生成
伊藤優人, 大島慶一郎, 深町康
2016年度日本海洋学会秋季大会, 14 Sep. 2016, Japanese, Oral presentation
鹿児島, [Domestic Conference] - 係留観測に基づくAMSR-E薄氷厚アルゴリズムの開発とオホーツク海の海氷生産量マッピング
柏瀬陽彦, 大島慶一郎, 深町康, 二橋創平
2016年度日本海洋学会秋季大会, 14 Sep. 2016, Japanese, Oral presentation
鹿児島, [Domestic Conference] - Sea Ice Velocity Observation by HF Ocean Radar
張偉, 江淵直人, 深町康, Emery Brian, 程豊, 阿部泰人, 豊田威信, 白澤邦男
2016年度日本海洋学会春季大会, 17 Mar. 2016, Japanese, Oral presentation
東京, [Domestic Conference] - 南極海氷コアから推定される昭和基地周辺の定着氷の発達・崩壊過程
豊田威信, 牛尾収輝, 田村岳史, 野村大樹, 清水大輔, 深町康, 松村義正, Fraser Alexander
2016年度日本海洋学会春季大会, 15 Mar. 2016, Japanese, Poster presentation
東京, [Domestic Conference] - アラスカ沖バロー沿岸ポリニヤにおける海氷生産量の経年変動
平野大輔, 深町康, 渡邉英嗣, 大島慶一郎, 岩本勉之, Mahoney Andrew, Eicken Hajo, 清水大輔, 田村岳史
2016年度日本海洋学会春季大会, 15 Mar. 2016, Japanese, Oral presentation
東京, [Domestic Conference] - ケープダンレー底層水形成に関わる乱流混合の役割
平野大輔, 北出裕二郎, 大島慶一郎, 深町康
2016年度日本海洋学会春季大会, 15 Mar. 2016, Japanese, Poster presentation
東京, [Domestic Conference] - 海氷結氷期における海底堆積物の上方輸送の観測
伊藤優人, 大島慶一郎, 西岡純, 楠本仁麦, 水田元太, 深町康
2016年度日本海洋学会春季大会, 15 Mar. 2016, Japanese, Oral presentation
東京, [Domestic Conference] - Formation and Variability of Antarctic Bottom Water off Cape Darnley: the Fourth Antarctic Bottom Water
Ohshima, K. I, Nakayama, Y, Fukamachi, Y, Matsumura, Y, Nihashi, S, Tamura, T, Kitade, Y, Hirano, D, Shimizu, D, Aoki S
2016 AGU Ocean Sciences Meeting, 25 Feb. 2016, English, Oral presentation
New Orleans, USA, [International presentation] - Observations of frazil ice formation and sediment upward transport off the northeast coast of Sakhalin
Ito M, Ohshima, K. I, Nishioka, J, Kusumoto, Y, Mizuta, G, Fukamachi, Y
The 31th International Symposium on Okhotsk Sea & Sea Ice, 23 Feb. 2016, English, Oral presentation
Monbetsu, Japan, [International presentation] - Validation of AMSR-E thin ice algorithm based on moored ice profiling sonar measurement
Fukamachi, Y, Ohshima, K. I, Iwamoto, K, Tamura, T, Nihashi, S
Workshop on satellite data for Arctic research and applications, Side event during Arctic Frontiers 2016, 27 Jan. 2016, English, Oral presentation
Tromsø, Norway, [International presentation] - Sea ice velocity observation by HF radar: Comparison with ADCP and buoy drifter measurements
Zhang, W, Ebuchi, N, Emery, B, Fukamachi, Y, Abe, H.. Shirasawa, K.. Toyota,T
研究集会「海洋レーダーを用いた海況監視システムの開発と応用」, 16 Dec. 2015, English, Oral presentation
春日, [Domestic Conference] - ハイブリッド特性を有するバロー沿岸ポリニヤにおける海氷生産量の経年変動
平野大輔, 深町康, 渡邉英嗣, 岩本勉之, Andrew Mahoney, Hajo Eicken, 清水大輔, 大島慶一郎, 田村岳史
第6回極域科学シンポジウム, 19 Nov. 2015, English, Poster presentation
立川, [International presentation] - 南極底層水を起点とする熱塩循環・物質循環のダイナミクス
大島慶一郎, 川合美千代, 北出裕二郎, 勝又勝郎, 深町康, 田村岳史, 青木茂
第6回極域科学シンポジウム, 17 Nov. 2015, English, Oral presentation
立川, [International presentation] - チャクチ海バロー沖におけるフラジルアイス生成と海底堆積物の上方輸送の観測
伊藤優人, 大島慶一郎, 深町康, 清水大輔, Andrew R. Mahoney, Hajo Eicken
第6回極域科学シンポジウム, 16 Nov. 2015, English, Oral presentation
立川, [International presentation] - 北極バロー沖沿岸ポリニヤにおけるフラジルアイスの生成・沈降と堆積物粒子の上方輸送の観測
伊藤優人, 大島慶一郎, 深町康, 清水大輔, A. R. Mahoney, H. Eicken
2015年度日本海洋学会秋季大会, 28 Sep. 2015, Japanese, Oral presentation
愛媛, [Domestic Conference] - Sea ice formation on continental shelves: a comparison of water mass signals near an Antarctic ice shelf and off the Alaskan coast
Inga J. Smith, Alex J. Gough, Patricia J. Langhorne, Hajo Eicken, Andrew R. Mahoney, Gregory H. Leonard, Robert Van Hale, Yasushi Fukamachi, Stefan Jendersie, Joshua Jones, Timothy G. Haskell
IGS International Symposium on Contemporary Ice-Sheet Dynamics, 08 Aug. 2015, English, Oral presentation
Cambridge, UK, [International presentation] - Numerical Investigation of Formation and Variability of Antarctic Bottom Water off Cape Darnley
Nakayama, Y, Ohshima, K. I, Matsumura, Y, Fukamachi, Y, Hiroyasu, H
26th IUGG General Assembly 2015, 01 Jul. 2015, English, Oral presentation
Prague, Czech Republic, [International presentation] - The fourth Antarctic Bottom Water: Cape Darnley Bottom Water
Ohshima, K. I, Fukamachi, Williams, G. D, Nihashi, S, Tamura, T, Kitade, Y, Hirano, D, Aoki, S, Wakatsuchi, M
26th IUGG General Assembly 2015, 01 Jul. 2015, English, Oral presentation
Prague, Czech Republic, [International presentation] - A wind-driven, hybrid latent and sensible heat coastal polynya at Barrow, Alaska
Hirano, D, Y. Fukamachi, E. Watanabe, K. Iwamoto, A. R. Mahoney, H. Eicken, D. Simizu, K. I. Ohshima, T. Tamura
26th IUGG General Assembly 2015, 27 Jun. 2015, English, Oral presentation
Prague, Czech Republic, [International presentation] - Sediment upward dispersion and frail ice formation by strong wnd events -A possible mechanism of iron supply to sea ice
Ito, M, K. I. Ohshima, J. Nishioka, Y. Kusumoto, G. Mizuta, Y. Fukamachi
ESSAS Annual Science Meeting, 17 Jun. 2015, English, Oral presentation
Seattle, USA, [International presentation] - Characteristics of sea-ice draft revealed by a moored ice-profiling sonar in the Chukchi Sea off Barrow, Alaska
Fukamachi. Y, Simizu, D, Ohshima, K. I, Iwamoto, K, Eicken, H, Mahoney, A. R
Fourth International Symposium on the Arctic Research (ISAR-4), 28 Apr. 2015, English, Poster presentation
Toyama, [International presentation] - SIZONet: Multi-purpose, multi-platform observations to inform responses to an Arctic sea ice cover in transformation
Eicken, H, Mahoney, A. R, Dammann, D. O, Jones, J, Hendricks, S, Fukamachi, Y, Ohshima, K. I, Haas, C, Gerland, S, Makshtas, A
Fourth International Symposium on the Arctic Research (ISAR-4), 28 Apr. 2015, English, Poster presentation
Toyama, [International presentation] - A wind-driven, hybrid latent and sensible heat coastal polynya at Barrow, Alaska
Hirano, D, Y. Fukamachi, E. Watanabe, K. Iwamoto, A. R. Mahoney, H. Eicken, D. Simizu, K. I. Ohshima, T. Tamura
Forth International Symposium on the Arctic Research (ISAR-4), 28 Apr. 2015, English, Oral presentation
Toyama, [International presentation] - 強風イベントによる海底堆積物の上方輸送とフラジルアイス生成-海氷への鉄供給メカニズム-
伊藤優人, 大島慶一郎, 西岡純, 楠本仁麦, 水田元太, 深町康
2015年度日本海洋学会春季大会, 24 Mar. 2015, Japanese, Oral presentation
東京, [Domestic Conference] - 係留観測による北極チャクチ海沿岸域の海氷厚に関する研究
守家衣利加, 深町康, 清水大輔, 大島慶一郎, 高塚徹, 岩本勉之, Mahoney Andrew R, Jones Joshua, Eicken Hajo
2015年度日本海洋学会春季大会, 23 Mar. 2015, Japanese, Oral presentation
東京, [Domestic Conference] - ビンセネス湾沖における南極底層水の特性
北出裕二郎, 嶋田啓資, 白井優, 青木茂, 深町康, 田村岳史, 牛尾収輝, 大島慶一郎
2015年度日本海洋学会春季大会, 23 Mar. 2015, Japanese, Oral presentation
東京, [Domestic Conference] - アラスカ沖バロー沿岸ポリニヤの特徴(Ⅱ)
平野大輔, 深町康, 渡邉英嗣, 岩本勉之, MahoneAndrew, Eicken Hajo, 清水大輔, 大島慶一郎, 田村岳史
2015年度日本海洋学会春季大会, 22 Mar. 2015, Japanese, Oral presentation
東京, [Domestic Conference] - リュツォ・ホルム湾定着氷域での海氷厚の分布と変動
杉本風子, 大島慶一郎, 田村岳史, 宇都正太郎, 下田春人, 清水大輔, 舘山一孝, 星野聖太, 深町康, 尾関俊浩, 牛尾収輝
2015年度日本海洋学会春季大会, 22 Mar. 2015, Japanese, Poster presentation
東京, [Domestic Conference] - Sediment upward dispersion and frazil ice formation by strong windy events in the Sea of Okhotsk observed with ADCP. -A possible mechanism of iron supply to sea ice-
Ito, M, Ohshima, K. I, Nishioka, J, Kusumoto, Y, Mizuta, G, Fukamachi, Y
The 30th International Symposium on Okhotsk Sea & Sea Ice, 16 Feb. 2015, English, Poster presentation
Monbetsu, Japan, [International presentation] - チャクチ海アラスカバロー沖における海氷厚の係留観測
守家衣利加, 深町康, 清水大輔, 大島慶一郎, 高塚徹, 岩本勉之, Mahoney Andrew R, Jones Joshua, Eicken Hajo
第5回極域科学シンポジウム, 05 Dec. 2014, Japanese, Poster presentation
立川, [International presentation] - アラスカ沖バロー沿岸ポリニヤの特徴
平野大輔, 深町康, 渡邉英嗣, 岩本勉之, Andrew Mahoney, Hajo Eicken, 清水大輔, 大島慶一郎, 田村岳史
第5回極域科学シンポジウム, 05 Dec. 2014, Japanese, Poster presentation
立川, [International presentation] - ビンセネス湾沖南極底層水の特性
北出裕二郎, 嶋田啓資, 白井優, 青木茂, 田村岳史, 深町康, 牛尾収輝, 大島慶一郎
第5回極域科学シンポジウム, 02 Dec. 2014, Japanese, Oral presentation
立川, [International presentation] - A wind-driven, hybrid latent and sensible heat coastal polynya at Barrow, Alaska
Hirano, D, Y. Fukamachi, E. Watanabe, K. Iwamoto, A. Mahoney, H. Eicken, D. Shimizu, K. I. Ohshima, T. Tamura
AGU Fall Meeting 2014, 15 Nov. 2014, English, Poster presentation
San Francisco, USA, [International presentation] - アラスカ沖バロー沿岸ポリニヤの特徴(Ⅰ)
平野大輔, 深町康, 渡邉英嗣, 岩本勉之, Andrew Mahoney, Hajo Eicken, 清水大輔, 大島慶一郎, 田村岳史
2014年度日本海洋学会秋季大会, 16 Sep. 2014, Japanese, Oral presentation
長崎, [Domestic Conference] - Antarctic Bottom Water production from intense sea-ice formation in the Cape Darnley Polynya
Ohshima, K. I, Y. Fukamachi, G. D. Williams, S. Nihashi, T. Tamura, Y. Kitade, D. Hirano, S. Aoki, M. Wakatsuchi
11th Annual Meeting, Asia Oceania Geosciences Society, 01 Aug. 2014, English, Invited oral presentation
Sapporo, Japan, [Invited], [International presentation] - 第4の南極底層水:ケープダンレー底層水
大島慶一郎, 深町康, Williams, G. D, 二橋創平, 田村岳史, 北出裕二郎, 平野大輔, 青木茂, 若土正曉
日本地球惑星科学連合2014年大会, 02 May 2014, Japanese, Oral presentation
横浜, [Domestic Conference] - ビンセネス湾沖南極底層水の流動特性について
白井優, 北出裕二郎, 嶋田啓資, 青木茂, 深町康, 大島慶一郎
2014年度日本海洋学会春季大会, 27 Mar. 2014, Japanese, Oral presentation
東京, [Domestic Conference] - アラスカバロー沖チャクチ海ポリニヤにおける海氷・海洋の係留観測
深町康, 大島慶一郎, 清水大輔, 伊藤優人, 岩本勉之, 松村義正, Eicken, H, Mahoney, A. R
2014年度日本海洋学会春季大会, 26 Mar. 2014, Japanese, Oral presentation
東京, [Domestic Conference] - Antarctic and Arctic land-fast sea ice: deriving parent water mass properties changes from sea ice cores
I. J. Smith, A. J. Gough, P. J. Langhorne, H. Eicken, A. R. Mahoney, G. H. Leonard, R. J. Van Hale, Y. Fukamachi, S. Jendersie, J. M. Jones, T. G. Haskell
IGS International Symposium on Sea Ice in a Changing Environment, 14 Mar. 2014, English, Oral presentation
Hobart, Australia, [International presentation] - Taking a look at both sides of the ice: comparing ice thickness and drift speed as observed from above and below sea ice near Barrow, Alaska
A. R. Mahoney, H. Eicken, Y. Fukamachi, K. I. Ohshima, D. Simizu, C. Kambhamettu, R. MV, S. Hendricks, J. Jones
IGS International Symposium on Sea Ice in a Changing Environment, 13 Mar. 2014, English, Oral presentation
Hobart, Australia, [International presentation] - Characteristics of sea-ice draft revealed by a moored ice-profiling sonar in the Chukchi Sea off Barrow, Alaska
Y. Fukamachi, D. Simizu, K. I. Ohshima, K. Iwamoto, H. Eicken, A. R. Mahoney
IGS International Symposium on Sea Ice in a Changing Environment, 13 Mar. 2014, English, Oral presentation
Hobart, Australia, [International presentation] - Distribution and interannual variability of sea-ice thickness in the pack-ice zone off Lützow-Holm Bay, Antarctica
F. Sugimoto, H. Shimoda, D. Simizu, S. Uto, K. Tateyama, S. Hoshino, T. Ozeki, T. Tamura, Y. Fukamachi, S. Ushio, K. I. Ohshima
IGS International Symposium on Sea Ice in a Changing Environment,, 10 Mar. 2014, English, Poster presentation
Hobart, Australia, [International presentation] - A study of formation processes of supercooled water and frazil ice in a coastal polynya
Ito M, K. I. Ohshima, Y. Fukamachi, D. Simizu, K. Iwamoto, Y. Matsumura, A. R. Mahoney, H. Eicken
IGS International Symposium on Sea Ice in a Changing Environment, 10 Mar. 2014, English, Oral presentation
Hobart, Australia, [International presentation] - A study of formation processes of supercooled water and frazil ice in a coastal polynya
Ito M, K. I. Ohshima, Y. Fukamachi, D. Simizu, K. Iwamoto, Y. Matsumura, A. R. Mahoney, H. Eicken
The 29th International Symposium on Okhotsk Sea & Sea Ice, 19 Feb. 2014, English, Oral presentation
紋別, [International presentation] - 沿岸ポリニヤにおける過冷却水およびフラジルアイス生成過程についての研究
伊藤優人, 大島慶一郎, 深町康, 清水大輔, 岩本勉之, 松村義正, Mahoney, A. R, Eicken,H
第4回極域科学シンポジウム, 12 Nov. 2013, Japanese, Poster presentation
[International presentation] - 2010年夏季北極海バロー海底谷における熱輸送
伊東素代, 菊地隆, 深町康, Pickart, R, 大島慶一郎, 清水大輔, Arrigo, K, Vagle, S, He, J, Ashjian, C
2013年度日本海洋学会秋季大会, 20 Sep. 2013, Japanese, Oral presentation
[Domestic Conference] - 沿岸ポリニヤにおける過冷却水およびフラジルアイス生成過程についての研究
伊藤優人, 大島慶一郎, 深町康, 清水大輔, 岩本勉之, 松村義正, Mahoney, A. R, Eicken,H
2013年度日本海洋学会秋季大会, 20 Sep. 2013, Japanese, Oral presentation
[Domestic Conference] - 昭和基地沖流氷域での海氷厚観測
杉本風子, 下田春人, 清水大輔, 宇都正太郎, 舘山一孝, 星野聖太, 尾関俊浩, 田村岳史, 深町康, 牛尾収輝, 大島慶一郎
2013年度日本海洋学会秋季大会, 19 Sep. 2013, Japanese, Oral presentation
[Domestic Conference] - ビンセネス湾ポリニヤにおける高密度陸棚水の生成について
北出裕二郎, 嶋田啓資, 田村岳史, 深町 康, 青木 茂, 牛尾 収輝, 大島 慶一郎
2013年度日本海洋学会秋季大会, 19 Sep. 2013, Japanese, Oral presentation
[Domestic Conference] - 第4の南極底層水: Cape Danley Bottom Water
大島慶一郎, 深町康, Williams, G. D, 二橋創平, 北出裕二郎, 平野大輔, 田村岳史, 青木茂, 若土正
2013年度日本海洋学会秋季大会, 19 Sep. 2013, Japanese, Oral presentation
[Domestic Conference] - 急激に変わりゆく北極海
菊地隆, 原田尚美, 深町康
2013年度日本海洋学会秋季大会, 18 Sep. 2013, Japanese, Oral presentation
札幌, [Invited], [Domestic Conference] - ビンセネス湾沖南極底層水の流動特性について
白井優, 北出裕二郎, 嶋田啓資, 青木茂, 深町康, 大島慶一郎
2014年度日本海洋学会春季大会, 27 Mar. 2013, Japanese, Oral presentation
東京, [Domestic Conference] - 北極海バロー沖における海氷厚直接観測
清水大輔, 深町康, 大島慶一郎, 岩本勉之
2013年度日本海洋学会春季大会, 22 Mar. 2013, Japanese, Oral presentation
[Domestic Conference] - ビンセネス湾沖での係留観測により捉えられた南極底層水の特性
北出裕二郎, 嶋田啓資, 田村岳史, 深町 康, 青木 茂, 牛尾収輝, 大島慶一郎
第35回極域気水圏シンポジウム, 29 Nov. 2012, Japanese, Oral presentation
[Domestic Conference] - サハリン沖での係留系氷厚データとの直接比較によるAMSR-E薄氷厚アルゴリズムの作成
柏瀬陽彦, 大島慶一郎, 深町康, 二橋創平
2012年度日本海洋学会秋季大会, 14 Sep. 2012, Japanese, Oral presentation
[Domestic Conference] - ビンセネス湾沖で係留観測によって捉えた南極底層水の特性
北出裕二郎, 嶋田啓資, 田村岳史, 深町康, 青木茂, 大島慶一郎, 牛尾収輝
日仏海洋学会学術研究発表会, 10 Jun. 2012, Japanese, Oral presentation
[Domestic Conference] - ケープダンレープロジェクト~第4の南極底層水起源域の同定
深町康, 清水大輔, 大島慶一郎, 小野数也, 田村岳史, 青木茂, 北出裕一郎, 平野大輔, 牛尾収輝, 橋田元
2012年度日本海洋学会春季大会, 26 Mar. 2012, Japanese, Oral presentation
[Domestic Conference] - 南極海ケープダンレーポリニヤにおける海氷・海洋の係留観測
深町康, 清水大輔, 大島慶一郎, 小野数也, 田村岳史, 青木茂, 牛尾収輝, 橋田元
第34回極域気水圏シンポジウム, 17 Nov. 2011, Japanese, Oral presentation
[Domestic Conference] - 南極海ケープダンレーポリニヤにおける海氷・海洋の係留観測
深町康, 清水大輔, 大島慶一郎, 小野数也, 田村岳史, 青木茂, 牛尾収輝, 橋田元
第2回極域科学シンポジウム, 17 Nov. 2011, Japanese, Oral presentation
[Domestic Conference] - 南極昭和基地における験潮儀とGPSブイで観測された潮位変化の比較
青山雄一, 深町康, 土井浩一郎, 青木茂, 渋谷和雄
日本測地学会第116回講演会, 26 Oct. 2011, Japanese, Oral presentation
[Domestic Conference] - 南極海ケープダンレーポリニヤにおける海氷・海洋の係留観測
深町康, 清水大輔, 大島慶一郎, 小野数也, 田村岳史, 青木茂, 牛尾収輝, 橋田元
2011年度日本海洋学会秋季大会, 27 Sep. 2011, Japanese, Oral presentation
[Domestic Conference] - ケープダンレー沖における南極底層水の形成と流動に関する数値的研究
中山佳洋, 大島慶一郎, 松村義正, 羽角博康, 深町康
2011年度日本海洋学会春季大会, 24 Mar. 2011, Japanese, Oral presentation
[Domestic Conference] - Polynya formation and sea ice production off Cape Darnley Antarctica, revealed by ALOS PALSAR and AMSR-E data
Ohshima, K. I, S. Nihashi, T. Tamura, Y. Fukamachi
4th ALOS Joint PI Symposium, 15 Nov. 2010, English, Oral presentation
[International presentation] - 海氷厚・南極底層水の係留系観測 -温暖化で氷厚・底層水は変化しているか?-
大島慶一郎, 深町康, 牛尾収輝, 橋田元, 青木茂, 清水大輔, 小野数也
南極観測シンポジウム, 15 Sep. 2010, Japanese, Oral presentation
[Domestic Conference] - オホーツク海の海氷が水塊形成・熱塩収支及びその変動に与えるインパクト
大島慶一郎, 中野渡拓也, 深町 康, 若土正曉, 二橋創平, S. C. Riser
2010年度日本海洋学会秋季大会, 10 Sep. 2010, Japanese, Oral presentation
網走, [Domestic Conference] - 海氷と沿岸海洋の相互作用による海氷漂流強化機構
中山佳洋, 大島慶一郎, 深町康
2010年度日本海洋学会秋季大会, 09 Sep. 2010, Japanese, Oral presentation
網走, [Domestic Conference] - 宗谷暖流の流速の短周期変動の下流方向への伝播
江淵直人, 深町 康, 大島慶一郎
2010年度日本海洋学会秋季大会, 09 Sep. 2010, Japanese, Oral presentation
網走, [Domestic Conference] - Antarctic Bottom Water revealed by mooring measurements off Cape Darnley, Antarctica
Fukamachi, Y, K. I. Ohshima, S. Aoki, Y. Kitade, T. Tamura, M. Wakatsuchi
International Polar Year Oslo Science Conference, 09 Jun. 2010, English, Oral presentation
Oslo (Norway), [International presentation] - Characteristics of ice in the Okhotsk coastal polynyas
Sohey Nihashi, Naoto Ebuchi, Shuhei Takahashi, Yasushi Fukamachi
INTERNATIONAL SYMPOSIUM ON SEA ICE IN THE PHYSICAL AND BIOGEOCHEMICAL SYSTEM, 03 Jun. 2010, English, Poster presentation
Tromoso, Norway, [International presentation] - ケープダンレー沖で観測された南極底層水の特性と分布
北出裕二郎, 平野大輔, 大島慶一郎, 深町康
2010年度日本海洋学会春季大会, 29 Mar. 2010, Japanese, Oral presentation
東京, [Domestic Conference] - 係留観測による南極海ケープダンレー沖における南極底層水について
深町康, 大島慶一郎, 青木茂, 北出裕二郎, 田村岳史, 若土正曉
2010年度日本海洋学会春季大会, 29 Mar. 2010, Japanese, Oral presentation
東京, [Domestic Conference] - 新たに発見された南極底層水とそれに関わる海氷生産の直接観測-ケープダンレープロジェクト-
大島慶一郎, 深町康
2010年度日本海洋学会春季大会, 29 Mar. 2010, Japanese, Oral presentation
東京, [Domestic Conference] - 枝幸沖水温の十数日変動
西田芳則, 田中伊織, 深町康, 大島慶一郎
2010年度日本海洋学会春季大会, 27 Mar. 2010, Japanese, Oral presentation
東京, [Domestic Conference] - Creation of heat/salt flux data set in the Okhotsk Sea using AMSR-E sea ice data.
Ohshima, K. I, T. Tamura, S. Nihashi, K. Iwamoto, D. Simizu, Y. Fukamachi
US CLIVAR/SeaFlux Workshop, Surface Fluxes: Challenges for High Latitudes, 17 Mar. 2010, English, Poster presentation
アメリカ・ボルダー, [International presentation] - 海鷹丸によりダンレー沖で観測された深底層水の特性と海洋微細構造
北出裕二郎, 平野大輔, 大島慶一郎, 深町康
第32回極域気水圏シンポジウム, 17 Nov. 2009, Japanese, Oral presentation
立川, [Domestic Conference] - 係留観測による南極海ケープダンレー沖における南極底層水の変動について
深町康, 大島慶一郎, 青木茂, 北出裕二郎, 田村岳史
第32回極域気水圏シンポジウム, 17 Nov. 2009, Japanese, Oral presentation
立川, [Domestic Conference] - ケープダンレープロジェクト -新たに発見された南極底層水とそれに関わるか海氷生産の直接観測
大島慶一郎, 深町康
第32回極域気水圏シンポジウム, 17 Nov. 2009, Japanese, Oral presentation
立川, [Domestic Conference] - 宗谷暖流の構造・流量の季節・経年変動
大島慶一郎, 森島秀太, 清水大輔, 江淵直人, 深町康, 若土正曉, Y. Volkov
2009年度日本海洋学会秋季大会, 28 Sep. 2009, Japanese, Oral presentation
京都, [Domestic Conference] - 南極海インド洋セクターのケルゲレン海台東側斜面域における南極底層水流量の時間変動
深町康, Stephen R. Rintoul・John, A. Church, 青木茂, Serguei Sokolov, Mark A. Rosenberg, 若土正曉
2009年度日本海洋学会秋季大会, 26 Sep. 2009, Japanese, Oral presentation
京都, [Domestic Conference] - GSOP report, The 5th meeting of the CLIVAR Southern Ocean Panel
Fukamachi, Y
16 Feb. 2009, English, Oral presentation
University of New South Wales, Sydney, Australia, [International presentation] - A trial of prediction of paralytic shellfish poisoning along the coast of Hokkaido in the Okhotosk Sea
Shimada, H, M. Sawada, I. Tanaka, H. Asami, Y. Fukamachi
The 24th International Symposium on Okhotsk Sea and Sea Ice, 16 Feb. 2009, English, Oral presentation
Shimada, H., M. Sawada, I. Tanaka, H. Asami, and Y. Fukamachi: A trial of prediction of paralytic shellfish poisoning along the coast of Hokkaido in the Okhotosk Sea, The 24th International Symposium on Okhotsk Sea and Sea Ice, Mombetsu Arts & Culture Cen, [International presentation] - Mooring measurement of the deep western boundary current over the eastern flank of the Kerguelen Plateau in the Indian Sector of the Antarctic
Fukamachi, Y, S. Aoki, J. A. Church, S. R. Rintoul, M. Rosenberg, M. Wakatsuchi
9th International Conference of the Southern Hemisphere Meteorology, 11 Feb. 2009, English, Oral presentation
Melbourne Convention Center, Melbourne, [International presentation] - Sea ice production in the polynya and the associated bottom water formation off the Cape Darnley, East Antarctica
Ohshima, K. I, T. Tamura, Y. Fukamachi, S. Aoki
9th International Conference of the Southern Hemisphere Meteorology and Oceanography, 10 Feb. 2009, English, Oral presentation
Melbourne Convention Center, Melbourne, [International presentation] - 南極海インド洋セクターのケルゲレン海台東側斜面域における南極底層水の流量
深町康, 青木茂・John A. Church, Stephen R. Rintoul, Mark Rosenberg, 若土正曉
第31回極域気水圏・生物圏合同シンポジウム, 02 Dec. 2008, Japanese, Oral presentation
東京, [Domestic Conference] - HF-radar technology in the Sea of Okhotsk
Ebuchi, N, Y. Fukamachi, K. I. Ohshima, M. Wakatsuchi
Fourth PICES (North Pacific Marine Science Organization) Workshop on the Okhotsk and adjacent areas, 28 Aug. 2008, English, Oral presentation
Abashiri, [International presentation] - Interannual material fluxes under seasonal sea ice in the Okhotsk Sea north of Hokkaido, Japan
Hiwatari, T, H. Koshikawa, K. Kohata, Y. Fukamachi, K. Shirasawa
Fourth PICES (North Pacific Marine Science Organization) Workshop on the Okhotsk and adjacent areas, 27 Aug. 2008, English, Oral presentation
Abashiri, [International presentation] - Downslope Mixing of Antarctic Bottom Water from East Antarctic Polynyas
G. Williams, S. Aoki, S. Marsland, Y. Fukamachi, B. Galton-Fenzi, S. Rintoul, N. Bindoff
SCAR/IASC, 09 Jul. 2008, English, Oral presentation
St. Petersburg, Russia, [International presentation] - オホーツク海サハリン北部沖における海氷厚の係留観測
深町康, 白澤邦男, 大島慶一郎, 水田元太, 若土正曉
2008年度日本海洋学会春季大会, 28 Mar. 2008, Japanese, Oral presentation
東京, [Domestic Conference] - 夏季北海道オホーツク海沿岸における麻痺性貝毒発生予測の試み
嶋田宏, 澤田真由美, 田中伊織, 浅見大樹, 深町康
2008年度日本海洋学会春季大会, 27 Mar. 2008, Japanese, Poster presentation
東京, [Domestic Conference] - HFレーダによる宗谷暖流の観測
江淵 直人, 深町康, 大島慶一郎, 白澤邦男, 石川正雄, 高塚徹, 若土正曉
九州大学応用力学研究所研究集会, 20 Dec. 2007, Japanese, Oral presentation
春日、福岡, [Domestic Conference] - Impact of sea-ice variability on physical and biological processes in the Sea of Okhotsk
Ohshima, K. I, Y. Fukamachi, T. Nakanowatari, T. Nakatsuka, J. Nishioka, M. Wakatsuchi
The Second Annual Meeting of the GLOBEC, 04 Jun. 2007, English, Oral presentation
函館, [International presentation] - Short-term variation in the Soya Warm Current observed by HF ocean radars and coastal tide gauges
Ebuchi, N, Y. Fukamachi, K. I. Ohshima, M. Wakatsuchi
Radiowave Oceanography The 8th International Workshop, 27 May 2007, English, Oral presentation
Cancun, Mexico, [International presentation] - 短波海洋レーダおよび沿岸潮位計で観測された宗谷暖流の短周期変動について
江淵直人, 深町康, 大島慶一郎, 若土正曉
海洋理工学会平成19年度春季大会, 17 May 2007, Japanese, Oral presentation
東京, [Domestic Conference] - 海底設置ADCPと海洋レーダを用いた宗谷暖流流量の見積り
深町康, 田中伊織, 大島慶一郎, 江淵直人, 水田元太, 吉田英雄, 若土正曉
九州大学応用力学研究所研究集会, 21 Dec. 2006, Japanese, Oral presentation
春日、福岡, [Domestic Conference] - HFレーダによる宗谷暖流の観測
江淵直人, 深町康, 大島慶一郎, 白澤邦男, 石川正雄, 高塚徹, 若土正曉
九州大学応用力学研究所研究集会, 20 Dec. 2006, Japanese, Oral presentation
春日、福岡, [Domestic Conference] - OOPC (Ocean Observations Panel for Climate) updates and links to panel
Fukamachi, Y
The 4th CLIVAR (Climate Variability and Predictability) Southern Ocean Panel Meeting, 14 Nov. 2006, English, Oral presentation
Buenos Aires, Argentina, [International presentation] - Variations in the Soya Warm Current observed by HF ocean radar, coastal tide gauges and satellite altimetry
Ebuchi, N, Y. Fukamachi, K. I. Ohshima, K. Shirasawa, M. Wakatsuchi
International Symposium on Remote Sensing, 02 Nov. 2006, English, Oral presentation
Busan, Korea, [International presentation] - 海底設置ADCPによる宗谷暖流の長期連続観測
深町康, 大島慶一郎, 江淵直人, 水田元太, 若土正曉
2006年度日本海洋学会秋季大会, 25 Sep. 2006, English, Oral presentation
名古屋, [Domestic Conference] - Observation of the Soya Warm Current combining HF ocean radar with coastal tide gauges and satellite altimetry
Ebuchi, N, Y. Fukamachi, K. I. Ohshima, K. Shirasawa, M. Wakatsuchi
IEEE International Geoscience and Remote Sensing, 31 Jul. 2006, English, Oral presentation
Denver, U.S.A., [International presentation] - Japanese mooring plan in the Cape Darnley polynya during the International Polar Year
Fukamachi, Y, K. I. Ohshima, S. Aoki, S. Ushio, M. Wakatsuchi
International Workshop on Antarctic Sea Ice Thickness, 07 Jul. 2006, English, Oral presentation
Hobart, Australia, [International presentation] - Observation of the Soya Warm Current using HF ocean radars
Ebuchi, N, Y. Fukamachi, K. I. Ohshima, K. Shirasawa, M. Wakatsuchi
Radiowave Oceanography The 7th International Workshop, 18 May 2006, English, Oral presentation
Hamburg, Germany, [International presentation] - 南極海インド洋セクターのケルゲレン海台東側斜面における深層西岸境界流の係留観測
深町康, 青木茂, 若土正曉
2006年度日本海洋学会春季大会, 29 Mar. 2006, Japanese, Oral presentation
横浜, [Domestic Conference] - 短波海洋レーダ・沿岸潮位記録・衛星高度計などを用いた宗谷暖流のモニタリング
江淵直人, 深町康, 大島慶一郎, 白澤邦男, 若土正曉
2006年度日本海洋学会春季大会, 26 Mar. 2006, Japanese, Oral presentation
横浜, [Domestic Conference] - Diurnal Coastal-Trapped Waves on the Eastern Shelf of Sakhalin in the Okhotsk Sea
Ono, J, K. I. Ohshima, G. Mizuta, Y. Fukamachi, M. Wakatsuchi
American Geophysical Union (AGU) Ocean Sciences Meeting, 20 Feb. 2006, English, Poster presentation
Honolulu, Hawaii, U.S.A., [International presentation] - 南極海インド洋セクターのケルゲレン海台東側斜面における深層西岸境界流の係留観測
深町康, 青木茂, 若土正曉
第28回極域気水圏シンポジウム, 30 Nov. 2005, Japanese, Oral presentation
東京, [Domestic Conference] - 短波海洋レーダ・沿岸潮位記録・衛星高度計などを用いた宗谷暖流のモニタリング
江淵直人, 深町康, 大島慶一郎, 白澤邦男, 若土正曉
海洋理工学会平成17年度秋季大会, 13 Oct. 2005, Japanese, Oral presentation
京都, [Domestic Conference] - 北海道オホーツク海沿岸域で発達する季節海氷はなにをもたらすのか? -セジメントトラップフラックスデータから-
樋渡武彦, 深町康, 白澤邦男, 永田隆一, 越川海, 木幡邦男, 渡辺正孝
日本プランクトン学会, Sep. 2005, Japanese, Oral presentation
[Domestic Conference] - Observation of the Soya Warm Current using HF Ocean Radar
Ebuchi, N, Y. Fukamachi, K. I. Ohshima, K. Shirasawa, M. Wakatsuchi
Radiowave Oceanography 6th International Workshop, 03 May 2005, English, Oral presentation
Santa Cruz, U.S.A., [International presentation] - カラフト東岸沖における潮流特性と日周潮陸棚波
小野純, 大島慶一郎, 水田元太, 深町康, 若土正曉
2005年度日本海洋学会春季大会, Mar. 2005, Japanese, Oral presentation
東京, [Domestic Conference] - Seasonal variation of the Soya Warm Current observed by HF ocean radar
Ebuchi, N, Y. Fukamachi, K. I. Ohshima, K. Shirasawa, M. Ishikawa, T. Takatsuka, T. Daibo, M. Wakatsuchi
International Symposium on Remote Sensing (ISRS), Oct. 2004, English
Jeju, Korea, [International presentation] - Observations of the Soya Warm Current using HF Ocean Radar
Ebuchi, N, Y. Fukamachi, K. I. Ohshima, K. Shirasawa, M. Ishikawa, T. Takatsuka, T. Daibo, M. Wakatsuchi
IEEE International Geoscience and Remote Sensing Symposium (IGARSS), Sep. 2004, English
Anchorage, Alaska, [International presentation] - 短波海洋レーダによる宗谷暖流の観測
江淵直人, 深町康, 大島慶一郎, 白澤邦男, 若土正曉
2004年日本海洋学会春季大会, 27 Mar. 2004, Japanese, Oral presentation
つくば, [Domestic Conference]
Affiliated academic society
Works
Research Themes
- Acoustic monitoring of Arctic top predators under abrupt climate change
科学研究費助成事業
01 Apr. 2024 - 31 Mar. 2028
Podolskiy Evgeny, 三谷 曜子, 杉山 慎, 深町 康, 長谷川 浩平
日本学術振興会, 基盤研究(B), 北海道大学, 24K02093 - Global redistribution of heat, salt and materials induced by sea-ice processes
Grants-in-Aid for Scientific Research
31 Aug. 2020 - 31 Mar. 2025
大島 慶一郎, 深町 康, 西岡 純, 二橋 創平, 三谷 曜子, 羽角 博康, 田村 岳史, 真壁 竜介, 木村 詞明
高海氷生産域であるフラジルアイス域を検知できるマイクロ波放射計AMSRのアルゴリズムを開発し、南大洋全域で初めてフラジルアイス域のマッピングを行った。フラジルアイス域を検知できたことで、今まで過小評価されていた沿岸ポリニヤでの海氷生産量をより高精度で見積もることができ、従来のアルゴリズムより、20-50%高い海氷生産量が示された。30年あまり継続してあるマイクロ波放射計SSM/I-SSMISデータに対し、薄氷タイプを識別することでより高精度の薄氷厚が推定できるアルゴリズムを開発した。南大洋をベースに開発したこのアルゴリズムは北極海でも適用可能であることも示され、全球に汎用性のあるアルゴリズムであることが示された。この開発により、長期間での全球での沿岸ポリニヤの海氷生産量の見積もりに道が開けた。プロファイリングフロートの溶存酸素量の変動から、初めてオホーツク海の広範囲で正味の生物生産量(純群集生産量)を見積もることに成功し、春の植物プランクトンの大増殖(春季ブルーム)は海氷融解によってもたらされていることを定量的指標をもって明らかにした。さらに、海氷融解時に放出される物質(鉄分)がブルームを誘起していることを示唆し、海氷による物質輸送の重要性を示した。観測としては、2021年3月に小型砕氷船ガリンコ号を傭船し、海氷サンプリングや氷縁での観測を実施し、海氷による物質輸送の観測研究に着手した。この他、CTDタグを購入し、データ通信用のアルゴスシステムに登録するなど、アザラシ、トドによるバイオロギング観測を行う準備を整えた。
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (S), Hokkaido University, 20H05707 - Discrimination method of suspended matter by ADCP and its application to investigation of material circulation
Grants-in-Aid for Scientific Research
30 Jul. 2020 - 31 Mar. 2023
大島 慶一郎, 深町 康, 伊藤 優人
超音波流速計ADCPの体積後方散乱強度データから、生物(主に動物プランクトン)活動、堆積物の巻き上がり、海中内部で生成される海氷(フラジルアイス)、等の海中浮遊物を検知・識別する手法を開発した。識別手法としては、複素EOF(CEOF)解析とバンドパスフィルタリングを主として用いた。中心周波数24時間のバンドパスフィルタをかけ、CEOF解析を施すことで、動物プランクトンの日周活動を明瞭に抽出する汎用性の高い手法を開発した。この方法では、潮流の強い海域では堆積物巻き上がりも抽出されるが、位相差の違いから両者は識別可能となる。フラジルアイス及び海底堆積物の巻き上がりに関しては、上層(フラジルアイスの場合)、下層(巻き上がりの場合)に重みをつけたCEOF解析、風速(フラジルアイスの場合)・海底流速(巻き上がりの場合)との結合EOF解析等を組み合わせることで、抽出はある程度可能となることもわかった。以上の識別手法を、オホーツク海、北極チュクチ海、南極ケープダンレーポリニヤ域で取得された係留系ADCPデータに適用した。南極ケープダンレー沖沿岸の係留データからは、日が昇らない冬季に動物プランクトンの日周鉛直活動が月の満ち欠けに呼応する1か月周期の変動を示すことを、南極域では初めて明らかにした。また、南極域及びオホーツク海の係留データからは、冬季海氷期は、海氷のない時期とは逆に、沿岸域より沖合域の方が動物プランクトンの日周鉛直活動が活発となることが示された。一方、過去にサンプリングした海氷の粒度粒径分布の解析を継続して行い、フラジルアイスによる堆積物取り込み過程の検討を行った。オホーツク海では2022年2月、砕氷巡視船そうやにより、新たな海氷サンプリングも行った。
Japan Society for the Promotion of Science, Grant-in-Aid for Challenging Research (Exploratory), Hokkaido University, 20K20933 - Sea-ice reduction in the Pacific Arctic during summer from the variability of sea-ice thickness during winter
Grant-in-Aid for Scientific Research (基盤研究(B))
2019 - 2022
Yasushi FUKAMACHI
北極海の太平洋側海域では夏季の海氷域の減少が近年になって特に顕著に見られているが、その要因は未だに良く解明されていない。その理由の一つは人工衛星データから正確に把握できる海氷の面積に較べて、その厚さの実態把握が不十分なことである。本研究ではこの海域における10 年以上の長期に渡る海氷・海洋の現場観測による海氷厚などのデータと衛星マイクロ波放射計データから見積られる海氷生産量のデータなどを用いて、海氷の力学過程(海氷同士の衝突と重なりによる氷厚の増加)と熱力学過程から決まる冬季の海氷厚分布の実態を明らかにし、それが夏季の海氷分布とどのように関係しているかを調べ、この海氷減少の要因を明らかにする。
Ministry of Education, Culture, Sports, Science and Technology, Principal investigator, Competitive research funding - Thermohaline and material circulation originating from coastal polynyas
Grant-in-Aid for Scientific Research (A)
2017 - 2019
Kiichiro OHSHIMA
南極底層水の起源水を生成しているケープダンレーポリニヤにおいて、過去に取得した係留系ADCPの後方散乱強度データから、海中でのフラジルアイスの生成だけでなく、生物活動のシグナルも捉えることにも成功した。最大の発見は、2月後半から3月にかけての海氷(フラジルアイス)生成開始に同期して、最大の生物シグナルが観測されたことである。これはごく最近報告された、フラジル・ブルーミングに相当すると考えられる。第59次南極地域観測隊では、ちょうどこのタイミングで海氷サンプリングを行うことに成功し、今後の解析により、大きな生物基礎生産が生じている可能性のあるフラジル・ブルーミングのメカニズム解明が期待される。また、2018年2月、第59次隊の協力のもと、ポリニヤ内において、海底堆積物の巻き上がりが生ずると推定される海域にADCPと濁度計等を取り付けた係留系を設置することにも成功した。さらに、2018年度実施予定のケープダンレー沖の係留系設置の準備として、係留系に設置される測器の購入とそのテスト・キャリブレーションなども行った。一方、衛星マイクロ波放射計データからフラジルアイスを検知できるアルゴリズムを完成させ、係留系ADCPによる海中フラジルアイス検知ともよく対応することが示された。今後、衛星海氷データと係留系データの組み合わせによる解析から、ポリニヤでの高海氷生産システムや物質循環の理解が深まることが期待される。北極チャクチ海ポリニヤにおいても、2017年8月アラスカ大学と共同して、ADCP・氷厚計・濁度計等からなる3系の係留系を設置することに成功した。また、前年度設置していた2系の係留系の回収にも成功し、ここのポリニヤを起点とする物質循環解明に資するデータを取得できた。オホーツク海に関しては、過去に蓄積されたフロートデータの解析を開始し、中層水等の季節変動を抽出する研究を行った。
Ministry of Education, Culture, Sports, Science and Technology, Competitive research funding - Study of sea-ice and oceanic variability off the northern Alaskan coast
Grants-in-Aid for Scientific Research(基盤研究(B))
2015 - 2018
Yasushi FUKAMACHI
フィールド観測については、8月に研究分担者の大島らがアラスカ北部に出向き、アラスカ大学フェアバンクス校の研究協力者と共同で、2015年に設置した3系の係留系の回収作業を実施した。また、国際協力によって行われているアラスカ北部沖における船舶観測についても、海洋研究開発機構の「みらい」を含む複数の研究船によって実施された。
アラスカ北部の沿岸域に係留されていた超音波氷厚計の生データから海氷厚の導出処理を終えて昨年度までに整備したアラスカ北部沿岸域における2009年から2015年までの6年分の時系列データを用いて、その経年変動についての解析を行った。その結果として、海氷厚の特徴(平均値、頻度分布など)に大きな経年変動が存在することを示し、その要因がこの海域の風速場に支配される海氷の漂流パターンの変動にあることを明らかにした。
これまでにアラスカ北部沿岸域に設置した係留系から得られた海洋の時系列データ(水温・塩分と海流流速)を周辺海域で得られた同様のデータ、人工衛星搭載のマイクロ波放射計データから推定される海氷厚に気象観測データを合わせて計算される海氷生産量データ、現実的で高解像度の海氷・海洋結合モデルの結果と合わせて解析した。その結果として、この海域における海水特性の変質過程に大きな経年変動が存在し、その要因がこの海域において岸沿いに吹く北東風の変動にあることを明らかにした。この北東風は北極海中層に広く分布する大西洋を起源とする海水の湧昇をもたらすため、太平洋側北極海でありながら、アラスカ北部沿岸域における海水特性の変質には大西洋水の影響が顕著であることも示した。
Ministry of Education, Culture, Sports, Science and Technology, Principal investigator, Competitive research funding - Quantifying and investigating the causes of freshwater content change in the Southern Ocean overturning
Grants-in-Aid for Scientific Research(基盤研究(B))
2013 - 2016
Shigeru AOKI
The Antarctic continental shelf is an important region in that it provides very dense water, which is one of the sources of Antarctic Bottom Water (AABW) that fills the global abyssal ocean. Recently freshening of AABW is reported and the causes are suspected to be on the Antarctic margin. This study aims to clarify the changes in oceanic properties in the Antarctic margin, especially based on in-situ hydrographic surveys including a noble tracer to detect continental ice melt component. For the Ross Sea shelf, the observed freshening corresponded to the basal warming in the West Antarctic shelf. For Adelie Depression off Adelie Land coast, both sea ice production and land-ice melt could change the shelf water properties, which can affect the properties of bottom water. Hence it was proposed that ice condition changes can affect the overturning circulation originated in the south.
Ministry of Education, Culture, Sports, Science and Technology, Competitive research funding - A new picture of Antarctic Bottom Water and deep water circulation, linked with sea-ice production
Grants-in-Aid for Scientific Research(基盤研究(A))
2013 - 2016
Kiichiro OHSHIMA
Formation of Antarctic Bottom Water (AABW) caused by high sea-ice production in coastal polynyas is detailed mainly for the East Antarctica. For the Cape Darnley polynya, the second highest ice production area in the Southern Ocean, the high ice production process through underwater frazil ice formation, and mixing/modification processes of dense water into AABW are clarified by mooring observations. For the Mertz polynya, which was the third ice production area, the ice production has decreased by as much as 50%, due to the glacier tongue calving, resulting in a significant decrease in AABW production. Formation of AABW is also suggested around the polynyas in Prydz Bay and Vincennes Bay in the East Antarctica. The balance between the polynya ice production (positive effect) and melting ice shelves (negative effect) is likely a key factor for the AABW formation.
Ministry of Education, Culture, Sports, Science and Technology, Competitive research funding - Is the region off Cape Darnley a main source of Antarctic Bottom Water?
Grants-in-Aid for Scientific Research(基盤研究(B))
2011 - 2013
Yasushi FUKAMACHI
Combining time-series oceanic data obtained by moorings off the Cape Darnley in the Indian Sector of the Southern Ocean during 2008-09 with concurrent sea-ice data obtained by satellite remote sensing and hydrographic data obtained by instrumented seals, we have quantitatively shown that this region is the one of the main sources of Antarctic Bottom Water (AABW) due to intense sea-ice production in a coastal polynya. Namely, this region is the fourth AABW source region after the Weddell and Ross Seas and the region off Adélie Land. Unlike in the other three source regions, this region is the main AABW source solely due to intense sea-ice production without any of large continental shelf, ice shelf, and large depression.
Ministry of Education, Culture, Sports, Science and Technology, 基盤研究(B), 北海道大学, Principal investigator, Competitive research funding - Development of a measurement method of sea-ice thickness by acoustic Doppler current profiler
Grants-in-Aid for Scientific Research(挑戦的萌芽研究)
2011 - 2013
Yasushi FUKAMACHI
Sea-ice thickness is generally measured by specific ice-profiling sonar (IPS). We carried out mooring observations off the northern Alaska to develop a method of sea-ice thickness measurement by widely-used oceanographic instrument, acoustic Doppler current profiler (ADCP). We have successfully obtained valid data by a pair of an IPS and an ADCP at total of four locations over three-year period and derived sea-ice draft from raw IPS data.
Using sea-ice and oceanic data obtained by our mooring observations, we have investigated break-up of coastal landfast sea ice, production of supercooled water and frazil ice within a coastal polynya, and compared our ice-thickness data by IPS with those by airborne electromagnetic sensor and ice-drift data by ADCP with those by coastal radar.
Ministry of Education, Culture, Sports, Science and Technology, Grant-in-Aid for Challenging Exploratory Research, Hokkaido University, Principal investigator, Competitive research funding, 23654163 - Estimations of freshening of Antarctic Bottom Water by international observation network and effect of glacial melt water
Grants-in-Aid for Scientific Research(基盤研究(B))
2009 - 2012
Shigeru AOKI
We established an international ocean observation network in the Australian-Antarctic Basin, Southern Ocean, with implementing stable oxygen isotope measurements as the standard method and compared the results with the previous hydrographic observations. Freshening tendency of the Antarctic Bottom Water in this basin was estimated. Analysis revealed that the major cause of this freshening is the freshening of the bottom water, flowing into this basin from the east, and its reduction of the flow rate. With this observation network, the baseline structure of stable oxygen isotope was constructed to infer causes of future oceanic change.
Ministry of Education, Culture, Sports, Science and Technology, Grant-in-Aid for Scientific Research (B), Hokkaido University, Coinvestigator not use grants, Competitive research funding, 21310002 - Global mapping and monitoring of sea ice production
Grants-in-Aid for Scientific Research(基盤研究(S))
2008 - 2012
Kiichiro OHSHIMA, 江淵 直人, 青木 茂, 深町 康, 豊田 威信, 北出 裕二郎
(抄録なし)
Ministry of Education, Culture, Sports, Science and Technology, 基盤研究(S), 北海道大学, Coinvestigator not use grants, Competitive research funding, 20221001 - Direct evaluation of sea-ice production and associated volume transport of Antarctic Bottom Water in a coastal region off the Antarctica
Grants-in-Aid for Scientific Research(基盤研究(C))
2008 - 2010
Yasushi FUKAMACHI
Based on the mooring data obtained off the eastern flank of the Kerguelen plateau in the pathway of Antarctic Bottom Water (AABW), we revealed that the equatorward transport of AABW in this region is comparable to that from the Weddell Sea and an important part of the meridional overturning circulation. Using the mooring data off the Cape Darnley Polynya (CDP), where sea-ice production is active, we confirmed that AABW is produced locally in this region. We have succeeded in the mooring observation of sea-ice thickness in the CDP and obtained the first high-precision data in the Antarctic c...
Ministry of Education, Culture, Sports, Science and Technology, 基盤研究(C), 北海道大学, Principal investigator, Competitive research funding, 20540419 - Direct evaluation of sea-ice production in the Sea of Okhotsk based on in sites ice-thickness observations
Grants-in-Aid for Scientific Research(基盤研究(C))
2005 - 2007
Yasushi FUKAMACHI, 木村 詞明
Sea-ice mooring data obtained off Yubetsu in the Hokkaido coastal region during the winters of 1999-2001 revealed the mean draft of 0.60m and the high deformed ice ratio of 80%. These results were published in Fukamachi et al. (2006, Journal of Geophysical Research). Also, sea-ice mooring data obtained off Mombetsu during the winter of 2005-06 along with the sediment-trap data collected by the National Institute for Environmental Studies indicated that the quality and quantity of sinking biogenic and lithogenic materials varied with the sea-ice cover. These results were published in Hiwatar...
Ministry of Education, Culture, Sports, Science and Technology, 基盤研究(C), 北海道大学, Principal investigator, Competitive research funding, 17540405 - Development of prediction system for drifting/diffusion of sea water, sea ice, and spilled oil in the Sea of Okhotsk
Grants-in-Aid for Scientific Research(基盤研究(B))
2005 - 2007
Keiichiro OHSHIMA, 若土 正曉, 江淵 直人, 三寺 史夫, 深町 康
As the base of prediction for drifting/diffusion of sea water, sea ice and spilled oil in the Okhotsk Sea, 3-dimensional ocean model with the resolution of 1/6 degree was developed. The model is driven by daily wind stress and monthly heat flux. Comparison with surface drifter, moored ADCP, and ocean radar data shows that the model successfully reproduces the velocity field for the East Sakhalin Current (ESC) and Soya Warm Current. The turbulent velocities are represented by random-walk on the assumption of a Markov-chain model. A series of particle tracking experiments was carried out for ...
Ministry of Education, Culture, Sports, Science and Technology, 基盤研究(B), 北海道大学, Coinvestigator not use grants, Competitive research funding, 17310002 - Quantitative evaluations of ocean circulation and meridional themohaline transport in the Indian sector of Antarctic
Grants-in-Aid for Scientific Research(基盤研究(B))
2005 - 2007
Masaaki WAKATSUCHI, 木村 詞明, 大島 慶一郎, 青木 茂, 深町 康, 牛尾 収輝
The purpose of this study is to make an analysis of our observational data in which the seasonal variability of volume transport for the northward flowing Antarctic Bottom Water in the Indian sector of the Antarctic could be successfully obtained for the first time. We have done the deployment of the current-mooring systems at 8 stations off the southeastern coast of the Kerguelen Plateau for two years from February 2003 to January 2005, as an international joint project together with CSIRO in Australia. Our primary data analyses have shown that this region has completely reverse current di...
Ministry of Education, Culture, Sports, Science and Technology, 基盤研究(B), 北海道大学, Coinvestigator not use grants, Competitive research funding, 17340138 - Analysis of Environmental Variability and Sea-Ice Climate and Dynamics Process in the Sea of Okhotsk
Grants-in-Aid for Scientific Research(基盤研究(B))
2003 - 2005
Kunio SHIRASAWA, 高橋 正征, 深町 康, 兒玉 裕二, 河村 俊行, 池田 元美, 舘山 一孝
Inter-annual and year-to-year variability in hydrometeorological parameters, snow and sea-ice has been studied with AWSs (Automated Weather Stations), IPSs/ADCPs (Ice Profiling Sonar/Acoustic Doppler Current Profiler), EM (Electromagnetic Induction Sounding of snow/sea-ice thickness measurements) at/offshore Chaivo, northeastern Sakhalin and Saroma-ko lagoon, Hokkaido in the Sea of Okhotsk. The model of snow/sea-ice thickness evolution was verified to agree well with those observed data.Ice climatology was also studied in the Baltic Sea to compare that in the Sea of Okhotsk, as representati...
Ministry of Education, Culture, Sports, Science and Technology, 基盤研究(B), 北海道大学, Coinvestigator not use grants, Competitive research funding, 15403008 - 海氷の厚さの係留観測データを用いたオホーツク海における海氷量の評価
科学研究費補助金(奨励研究(A))
2000 - 2001
深町 康
1.係留観測データの解析2001年の冬季に、過去2年間と同じように、北海道沿岸域湧別沖6マイルの地点で得られたIce Profiling Sonar(IPS)のデータの解析を行った。この年は、オホーツク海全体における最大海氷面積が1979年以来の最大であったことからも推測されるように、1月上旬から係留観測点において海氷が観測されていたが、氷厚については、過去2年間に見られたような極端に大きいice keelはあまり見られなかった。この理由としては、海氷の密接度が高かったために、raftingやridgingのような変形プロセスが起きにくかったことが考えられる。2001年を含めたこれまでの3年間の氷厚データの特徴は、各年について大きく異なっている。このことは、北海道沿岸域に存在する海氷は、海氷面積のみならず、氷厚についても、大きな年々変動があることを示唆しており、海氷量の見積もりに対しての氷厚の重要性をも示している。2.更なる観測の実施2001年11月には、過去3年間と同様に、湧別沖にIPSとAcoustic Doppler Current Profilerを設置しており、近日中に回収の予定である。また、海氷域における氷厚観測の可能性を広げるために、自律走行型海中ロボットAUV(Autonomous Underwater Vehicle)にIPSを搭載して、紋別港周辺の海域にお...
文部科学省, 奨励研究(A), 北海道大学, Principal investigator, Competitive research funding, 12740266 - Sea ice / ocean coupled system in the melting season for seasonal ice zones
Grants-in-Aid for Scientific Research(基盤研究(C))
1997 - 1999
Keiichirou OHSHIMA, 浮田 甚郎, 深町 康
The heat budget analyses show that the net heat input at the water surface reaches 1OO-150 W m^<-2> in the active ice melting season due to large solar heating, while that at the ice surface is nearly zero because of the difference in surface albedo. The temporal variation of the heat input to the upper ocean corresponds well to the melting rate of sea ice. These results suggest that melting of sea ice in the Antarctic Ocean is mostly accomplished by the heat input to the upper ocean through the open water area.In the Antarctic Ocean, the anomalies in ice concentration in the retreat season...
Ministry of Education, Culture, Sports, Science and Technology, 基盤研究(C), 北海道大学, Coinvestigator not use grants, Competitive research funding, 09640516 - Analysis of water mixing history in high latitude oceans using chemical tracers of the third generation
Grants-in-Aid for Scientific Research(基盤研究(B))
1997 - 1998
Takeshi NAKATSUKA, 深町 康, 大島 慶一郎
The research supported by this grant-in-aid mainly consists of following two parts. One is the analysis of history of the biological activity and water mixing in ocean surface layer using nitrogen isotope ratio of nitrate, and the other is the analysis of water advection and mixing processes in the intermediate and deep layers based on precise measurements of nutrient concentration. We used the surface water samples which were annually collected in Bering Sea and Alaska Bay by a merchant vessel between Japan and Canada for the former study, and the samples collected by the CTD/RMS observati...
Ministry of Education, Culture, Sports, Science and Technology, 基盤研究(B), 北海道大学, Coinvestigator not use grants, Competitive research funding, 09440163 - 衛星と現場観測による、オホーツク海の海氷変動とそれに伴なう熱塩収支過程の研究
科学研究費補助金(重点領域研究)
1997 - 1997
大島 慶一郎, 水田 元太, 深町 康, 竹内 謙介, 若土 正曉
オホーツク海冬季の現場での海氷・海洋データは今までほとんど得られていなかった。1996,1997,1998年2月の3年にわたって海上保安庁の砕氷船「そうや」により、オホーツク海南西部において、海氷の諸量及び海洋構造の観測を行った。海氷の厚さは1996,1998年は平均20〜30cm程度であったが、1997年は60cmあり、年によって大きく異なることがわかった。従って、衛星データから得られる密接度のデータから海氷の量的な評価を行うことは大きな問題がある。また、この氷厚の違いが何によるのかは今後の興味深い課題である。海氷アルベド(日射に対する反射率)は1996,1997年の観測から、オホーツク海では氷状によらずほぼ0.6〜0.65程度であることがわかった。1997年2月の海氷域での海氷観測データから以下のことが明らかになった。オホーツク海では冬季、結氷温度で一様な海洋混合層が300m以上に及ぶ場合がある。これは、海氷生成による鉛直対流だけでなく、南風による岸でのエクマン収束のようなmechanicalな効果によることも示唆される。このような厚い混合層を持つ水塊は東カラフト海流として海底斜面に沿ってカラフト沿岸沿いを南下し、それに伴って厚い海氷も南へ運ばれる。移流された海氷の一部は風で周辺の暖水域へ運ばれ、初めはそこで融解され表層を低塩化するが潜熱を奪うことによって、やがてそこを結...
文部科学省, 重点領域研究, 北海道大学, Coinvestigator not use grants, Competitive research funding, 09227201 - A study on mechanisms for the formation of polynyas in the Antarctic
Grants-in-Aid for Scientific Research(一般研究(B), 基盤研究(B))
1995 - 1997
Masaaki WAKATSUCHI, 日比谷 紀之, 深町 康, 大島 慶一郎, 河村 俊行
Polynyas are the areas of open water which often occurs within the Antarctic sea ice cover. The major purpose of this study is to provide fundamental informations of actual behaviors which occur in the polynyas, and of its role in the polar regions.To investigate the polynyas, we adopted two regions, around Syowa Station and off Adelie Land as study areas. The results of our investigations are as follows ;(1) There are two types of formation and maintenance for coastal polynyas. One is produced and maintained by strong, local winds and the existence of fast ice in a region east of the polyn...
Ministry of Education, Culture, Sports, Science and Technology, 一般研究(B), 基盤研究(B), 北海道大学, Coinvestigator not use grants, Competitive research funding, 07454107 - 海氷消長過程における大気-海氷-海洋-生態系システムモデル化のため実験研究
科学研究費補助金(一般研究(B), 基盤研究(B))
1995 - 1997
白澤 邦男, 深町 康, 田口 哲, 児玉 裕二, 石川 信敬, 青田 昌秋, 河村 俊行
冬季に海氷が生成され発達する北海道のサロマ湖を、氷縁域、薄い海氷域のモデル実験フィールドとして、海氷が生成する12月から融解が始まる3月まで現場実験観測を集中的に実施した。1997年12月から1998年3月の冬は3箇年の研究計画の3年度であり、初年度、2年度にできなかった実験観測を集中的に実施した。またモデル作成に必要な基礎データを収集した。(1)海氷の生成から融解に至る過程での大気-海氷間の気象パラメータの収集、(2)海氷消長過程における海氷内部構造、特にブライン・チャンネルを中心にした物理構造の変遷、温度センサーによる海氷中、海氷下海洋境界層の温度分布の季節変動の測定、照度センサーによる海氷上、中、下の光環境の季節変動の測定、(3)温度・塩分センサー付3次元電磁流速計を繋留しての海氷生成前から融解後までの海氷消長過程における海洋構造の季節変動、海氷-海洋間の運動量、熱、塩フラックスの交換過程の把握、(4)海氷の消長とブラインの排出機構、(5)アイス・アルジ-の分布や離脱量の消長とその生物・化学組成の把握、(6)セジメント・トラップを用いてのアイス・アルジ-、動物プランクトン、沈降粒子物質フラックスの日周、潮汐、季節変化を把握するための現場実験観測を行なった。今冬のサロマ湖海氷上の現場実験観測は修了したが、データ解析は現在進行中である。また、セジメント・トラップと3次元電磁...
文部科学省, 一般研究(B), 基盤研究(B), 北海道大学, Coinvestigator not use grants, Competitive research funding, 07458117 - 衛星と現場観測による、オホーツク海の海氷変動とそれに伴なう熱塩収支過程
科学研究費補助金(重点領域研究)
1996 - 1996
大島 慶一郎, 深町 康, 河村 俊行, 若土 正曉
オホーツク海では冬季海氷が覆われる時期での海氷及び海洋の観測は過去にほとんど行なわれていない。1996年2月と1997年2月に海上保安庁の砕氷船「そうや」により、オホーツク海南西部において海氷域での海氷・海洋観測を行なった。特に海氷に関しては今まで計られていない海氷の厚さ、アルベド(日射に対する反射率)の観測を行った。海氷の厚さは1996年では5〜30cmで平均20cm程度、1997年では20〜80cmで両年で大きな違いがあった。今後、この違いは何によるのかを衛星データと組み合わせた解析を行なう予定である。オホーツク海の海氷のアルベドは平均して0.59と推定された。ただし、ダ-クニラスのアルベドは約0.1という値となり、この低い値はニラスの結晶構造によることも示唆された。海洋構造の観測から、冬季のオホーツク海南西域では北方より水が流れていること、またその冬季の鉛直混合対流は300m以上にも及ぶことが観測された。また、氷縁域ではまず海氷が移流され融解して海水が低温低塩化し、それが現場結氷を生じさせる状況をつくっていることが明らかになった。マイクロ波放射計データ(DMSP SSM/I)から海氷の密接度だけでなく海氷の種類(Ice Type)の情報を用いて、海氷の結氷域に注目することによって海氷の特徴的な変動過程を調べた。氷縁域での広範囲に及ぶ結氷は、大気場の擾乱により海氷域が急速...
文部科学省, 重点領域研究, 北海道大学, Coinvestigator not use grants, Competitive research funding, 08241201 - 氷縁域におけるメソスケール渦の研究
科学研究費補助金(奨励研究(A))
1995 - 1995
深町 康
夏季の氷縁域において特徴的に見られるメソスケール渦などの中規模現象の形成機構を調べるために、力学・熱力学の両過程を含む水平2次元の海氷・海洋結合モデルを作成した。このモデルにおいて南極海で観測されたパラメーターを用い、外力としては熱力学過程の重要性を理解するために大気からの熱フラックスのみを与えて計算を行なった。大気からの熱フラックスに対する応答として、氷縁付近で海氷の融解が最も盛んとなり、塩分フロントが形成された。この塩分フロントと地衡流バランスで釣り合っている氷縁に沿う流れは、その流速が増加するにつれて蛇行するようになった。この蛇行は、海氷域の低温・低塩水と開水域の高温・高塩水の交換を促進すると共に、海氷を開水域に移流し舌状の海氷分布を形成した。結果として、蛇行の成長につれて、海氷の融解が更に促進されることとなった。この蛇行の形成機構を解明するために、海洋モデルの線形不安定解析を行なったところ、水平密度フロントに起因する傾圧不安定がその成因であることが明らかになった。氷縁域で見られる様々なメソスケール現象の形成には、風による力学的な効果が重要な役割を果たしていることは間違い無い。しかしながら、この研究によって、海氷が融解する夏季においては、熱力学的な効果も重要な役割を果たしていることが示された。現時点では、南極海等で夏季に海氷の分布によって可視化されるメソスケール渦そのも...
文部科学省, 奨励研究(A), 北海道大学, Principal investigator, Competitive research funding, 07740380 - 極域海洋における氷山融解過程の研究
科学研究費補助金(重点領域研究)
1993 - 1993
若土 正暁, 若土 正曉, 長島 秀樹, 深町 康, 大島 慶一郎
本研究では、時間的にも空間的にも最もグローバルな水循環系の一部を占める極域海洋における氷山融解過程を明らかにするために現場観測と水槽実験を試みた。(1)現場観測;研究分担者大島は第32次日本南極地域観測隊(1990〜1992)に参加し、ACR(南極気候研究)の一貫として、昭和基地周辺の海洋・海氷観測を実施した。そのうち、リュツォ・ホルム湾の定着氷に捕捉された氷山近傍で実施したCTD観測において、水温・塩分の鉛直プロファイルがステップ(階段)構造を示していることを見い出した(Ohshima et al.,1994)。これらT,Sのステップ構造は氷山が喫水している範囲内の深さにおいてのみ見られた。典型的なステップの厚さは20〜30m、その水温差、塩分差はそれぞれ0.05℃、0.05〜0.10%_0であった。このステップ構造は、海洋に対する氷山の何らかの影響を示しており、塩分成層した海洋中での氷山の側壁融解過程に伴って誘起された可能性がある。氷山に限らず、棚氷や海氷などの融解は、夏季の極域海洋における支配的な海洋現象として、その物理過程を調べることは重要である。(2)水槽実験:海洋中における氷山融解過程の研究は、今までにも極端に単純化した形の水槽実験が試みられている。それらは、密度成層か密度一様か、側壁融解か底面融解かに大きく分類される。そのうち、本研究では、今まで全くなされていな...
文部科学省, 重点領域研究, 北海道大学, Coinvestigator not use grants, Competitive research funding, 05216201 - 日本海底層水形成に関わる間宮海峡の海洋・海氷研究
科学研究費補助金(一般研究(C))
1993 - 1993
若土 正暁, 若土 正曉, 深町 康, 大島 慶一郎
本研究の目的は、海象データの解析、人工衛星からの画像データによる氷状観測、さらには数値実験などによって、日本海底層水の形成機構を明らかにすることである。特に今回初めて得られたヨーロッパの地球資源衛星(ERS-1)からの合成開口レーダ(SAR)画像をはじめ、AVHRRの可視・赤外画像などを解析することによって、日本海底層水形成に本質的な役割を果たしていると考えられている、間宮海峡やシベリヤ沿岸沖の海氷生成過程についての定量的な情報を得る。幸いにも、今回解析したデータの中には、明らかに気象条件の異なる場合(強風と微風)が含まれていたので、両者を比較検討することによって、以下のような風による海氷過程の違いを観測することが出来た。まず、北風の強い時には、シベリヤ沿岸沖に形成した沿岸ポリニヤ域で、急速なフラジルアイスの生成と風による風下への吹き流しが大規模に起こっていることが観測された。一方、風がほとんど無かった時には、漂流ベクトルを求めた画像解析によって、氷が5〜15km/dayの速度で北向きに移動していることが観測された。この微風条件下にもかかわらず北向きの漂流は、連続性から、その補償流として、やや深い層を南向きに流れるプリュームが存在してるはずであることを示唆している。このプリュームは海氷生成にともなって排出されるブライン(高塩分水)によってもたらされていると考えられる。2層モデ...
文部科学省, 一般研究(C), 北海道大学, Coinvestigator not use grants, Competitive research funding, 05640472