Researcher Database

FUKAMACHI Yasushi
Arctic Research Center
Professor

Researcher Profile and Settings

Affiliation

  • Arctic Research Center

Job Title

    Professor

URL

Research funding number

  • 20250508

ORCID ID

  • 0000-0001-5798-9380

Research Interests

  • Southern Ocean   Sea of Okhotsk   sea ice   Antarctic Bottom Water   Meridional overturning circulation   Polynya   

Research Areas

  • Earth and planetary science / Meteorology/Physical oceanography/Hydrology / Polar Oceanography

Academic & Professional Experience

  • 2011/02 - 2018/09    Water and Material Cycles Section, Institute of Low Temperature Science, Hokkaido UniversityAssociate Professor
  • 2008/10 - 2011/01    Water and Material Cycles Section, Institute of Low Temperature Science, Hokkaido UniversityAssistant Professor
  • 2007/04 - 2008/09    Marine and Atmospheric Science Research Section, Institute of Low Temperature Science, Hokkaido UniversityAssistant Professor
  • 1995/04 - 2007/03    Marine and Atmospheric Science Research Section, Institute of Low Temperature Science, Hokkaido UniversityAssistant Professor
  • 1992/11 - 1995/03    Oceanography Section, Institute of Low Temperature Science, Hokkaido UniversityAssistant Professor

Education

  • 1986/10 - 1992/10  Nova University  Oceanographic Center
  •        - 1992  Nova University Graduate School  Oceanographic Center  Physical Oceanography
  •        - 1986  Hokkaido University  Faculty of Science  Department of Geophysics

Association Memberships

  • The Oceanographic Society of Japan   American Geophysical Union   The Oceanography Society   

Research Activities

Published Papers

Conference Activities & Talks

  • Interactions between sea-ice drift and near-inertial internal waves in the Northwind Abyssal Plain, Arctic Ocean: year-round mooring observations  [Not invited]
    Yusuke Kawaguchi et al.
    EGU General Assembly 2019  2019/04
  • Mooring measurement of sea ice and ocean in the northeastern coastal Chukchi Sea from 2009  [Invited]
    Fukamachi, Y.
    Japan-U.S. Arctic Science Collaboration “Reflections on the Past Two Decades and Future Opportunities”  2019/03
  • HU-UAF collaboration over the past 20 years in the Arctic and Sub-Arctic  [Not invited]
    Saitoh, S. and Y. Fukamachi
    Japan-U.S. Arctic Science Collaboration “Reflections on the Past Two Decades and Future Opportunities”  2019/03
  • Bio-related material cycle in a coastal polynya observed with moored acoustic and optical instruments in the northeastern Chukchi Sea  [Not invited]
    Masato Ito, Kay I. Ohshima, Yasushi Fukamachi, Hajo Eicken, Andrew R. Mahoney, Joshua Jones, Toru Takatsuka
    The Ninth Symposium on Polar Science  2018/12
  • Effects of glacial meltwater discharge on surface water pCO2 and air–sea CO2 flux in Bowdoin Fjord in northwestern Greenland  [Not invited]
    Daiki Nomura, N. Kanna, S. Yunoki, D. Sakakibara, Y. Fukamachi, T. Hirawake and S. Sugiyama
    Polar 2018  2018/06  Davos, Switzerland
  • Monitoring of the Soya Warm Current by HF Ocean Radars since 2003  [Not invited]
    Naoto Ebuchi, Yasushi Fukamachi, Kay I. Ohshima, Toru Takatsuka, Masao Ishikawa, Kunio Shirasawa, and Masaaki Wakatsuchi
    The 4th Ocean Radar Conference for Asia-Pacific  2018/06  Naha, Japan
  • An evidence of a subglacial freshwater discharge into a fjord at the boundary of Bowdoin Glacier, northwestern Greenland  [Not invited]
    KANNA, Naoya, SUGIYAMA, Shin, SAKAKIBARA, Daiki, FUKAMACHI, Yasushi, NOMURA Daiki, FUKUMOTO, Sungo, PODOLSKIY, Evgeniy
    JpGU Meeting 2018  2018/05  Chiba, Japan
  • 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  [Not invited]
    Eicken, Mahoney, Lee, Johnson, Jones, Ohshima, Fukamachi
    2018 Ocean Sciences Meeting  2018/02  Portland, USA
  • Transports of macronutrient and inorganic carbon to surface waters by subglacial meltwater plume in Bowdoin Fjord in northwest Greenland  [Not invited]
    N. Kanna, S. Sugiyama, Y. Ohashi, D. Sakakibara, B. Nishizawa, I. Asaji, Y. Fukamachi and D. Nomura
    2018 Ocean Sciences Meeting  2018/02  Portland, USA
  • High Ice Production in Antarctic Coastal Polynyas and Its Possible Linkage to Material Cycle and Biological Productivity (Invited)  [Not invited]
    Kay I. Ohshima, Masato Ito, Sohey Nihashi, Yasushi Fukamachi, Kazuki Nakata and Daisuke Simizu
    2018 Ocean Sciences Meeting  2018/02  Portland, USA
  • Seasonal variability of near-inertial internal waves in the Northwind Abyssal Plain, Arctic Ocean  [Not invited]
    Y. Kawaguchi, M. Itoh, Y. Fukamachi, E. Moriya, N. Onodera and T. Kikuchi
    Fifth International Symposium on Arctic Research (ISAR-5)  2018/01  Tokyo
  • Sea-ice thickness from moored ice-profiling sonar in the Canada Basin, Arctic Ocean  [Not invited]
    Motoyo Itoh, Yasushi Fukamachi, Noriaki Kimura, Richard A. Krishfield, Takashi Kikuchi, Erika Moriya, Jonaotaro Onodera and Naomi Harada
    Fifth International Symposium on Arctic Research (ISAR-5)  2018/01  Tokyo
  • Continuous Sea-ice Thickness Measurement in the Northeastern Coastal Chukchi Sea from 2009  [Not invited]
    Y. Fukamachi, K. I. Ohshima, A. R. Mahoney, H. Eicken, D. Simizu, K. Iwamoto, E. Moriya, T. Takatsuka and J. Jones
    Fifth International Symposium on Arctic Research (ISAR-5)  2018/01  Tokyo
  • Sea-ice thickness from moored ice-profiling sonar in the Canada Basin, Arctic Ocean  [Not invited]
    Motoyo Itoh, Yasushi Fukamachi, Noriaki Kimura, Richard A. Krishfield, Takashi Kikuchi, Erika Moriya, Jonaotaro Onodera and Naomi Harada
    Arctic Change 2017  2017/12  Québec, Canada
  • Mooring measurement in Bowdoin Fjord in northwestern Greenland  [Not invited]
    Yasushi Fukamachi, Naoya Kanna, Shin Sugiyama, Yoshihiko Ohashi, Daiki Sakakibara and Daiki Nomura
    The 8th Symposium on Polar Science  2017/12
  • Sea Ice Velocity Observation by HF Ocean Radar  [Not invited]
    W. Zhang, N. Ebuchi, Y. Fukamachi, and B. Emery
    International Radiowave Oceanography Workshop  2017/09  Lüneburg, Germany
  • The Suppression Of Antarctic Bottom Water Formation By Melting Ice Shelves In Prydz Bay  [Not invited]
    Guy WILLIAMS, Laura HERRAIZ-BORREGUERO, Fabien ROQUET, Takeshi TAMURA, Kay OHSHIMA, Yasushi FUKAMACHI, Alexander FRASER, Libao GAO, Hongxia CHEN, Clive MCMAHON, Robert HARCOURT and Mark HINDELL
    14th Annual Meeting of Asia Oceania Geosciences Society  2017/08  Singapore
  • easonal variability of near-inertial internal waves and its kinetic energy in the ice-diminishing Arctic Ocean  [Not invited]
    Yusuke Kawaguchi, Motoyo Itoh, Takashi Kikuchi, Jonaotaro Onodera, Naomi Harada, Yasushi Fukamachi and Erika Moriya
    JpGU-AGU Joint Meeting 2017  2017/05  Chiba, Japan
  • Effect of subglacial meltwater plume formation on phytoplankton growth in the fjord of Bowdoin Glacier in northwest Greenland  [Not invited]
    Naoya Kanna, Shin Sugiyama, Yoshihiko Ohashi, Daiki Sakakibara, Bungo Nishizawa, Izumi Asaji and Yasushi Fukamachi
    JpGU-AGU Joint Meeting 2017  2017/05  Chiba, Japan
  • Abrupt changes and interactions of polar oceans and ice sheets as a research subject in Master Plan 2020  [Not invited]
    Shin Sugiyama, Yasushi Fukamachi, Kay I. Ohshima1, Shigeru Aoki, Teruo Aoki, Michiyo Yamamoto-Kawai, Takashi Kikuchi and Daisuke Hirano
    JpGU-AGU Joint Meeting 2017  2017/05  Chiba, Japan
  • Subglacial meltwater discharge and its impact on water properties in Bowdoin Fjord, northwestern Greenland  [Not invited]
    Yoshihiko Ohashi, Shigeru Aoki, Yoshimasa Matsumura, Shin Sugiyama, Naoya Kanna, Daiki Sakakibara and Yasushi Fukamachi
    JpGU-AGU Joint Meeting 2017  2017/05  Chiba, Japan
  • Variability of sea-ice thickness in the northeastern coastal Chukchi Sea revealed by a moored ice-profiling sonar  [Invited]
    Fukamachi Yasushi, Simizu Daisuke, Ohshima Kay, Eicken Hajo, Mahoney Andrew, Iwamoto Katsushi, Moriya Erika and Nihashi Sohey
    JpGU-AGU Joint Meeting 2017  2017/05  Chiba, Japan
  • Sea ice field course at Saroma Lagoon and Okhotsk Sea by International Antarctic Institute  [Not invited]
    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  2017/02  Monbetsu, Japan
  • Underwater frazil ice formation in the Sakhalin polynya  [Not invited]
    Ito, M., Ohshima, K. I., Fukamachi, Y., Shirasawa, K.
    The 32nd International Symposium on the Okhotsk Sea & Polar Oceans  2017/02  Monbetsu, Japan
  • Variability of sea-ice thickness in the northeastern coastal Chukchi Sea revealed by a moored ice-profiling sonar  [Not invited]
    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  2017/02  Monbetsu, Japan
  • Turbid meltwater discharge and its impact on phytoplankton growth in the fjord of Bowdoin Glacier in northwest Greenland  [Not invited]
    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  2017/01  Bethel, USA
  • Variability of sea-ice thickness in the northeastern coastal Chukchi Sea revealed by a moored ice-profiling sonar  [Not invited]
    Fukamachi, Y.
    Workshop on Sea Ice Remote Sensing and Modeling  2017/01  Tokyo
  • Landfast Sea Ice Breakouts: Stabilizing Ice Features, Oceanic and Atmospheric Forcing at Barrow, Alaska  [Not invited]
    Jones, J., Eicken, H., Manoney, A. R., Kambhamettu, R. MV, C., Fukamachi, Y., Ohshima, K. I., George, C.
    2016 AGU Fall Meeting  2016/12  San Francisco, USA
  • The observation of underwater frazil ice formation and upward sediment transport in an Arctic polynya in the Chukchi Sea  [Not invited]
    Ito, M., Ohshima, K. I., Fukamachi, Y., Simizu D., Mahoney, A. R., Eicken, H.
    2016 AGU Fall Meeting  2016/12  San Francisco, USA
  • Modeling glacial meltwater runoff process in Bowdoin Fjord, northwestern Greenland  [Not invited]
    Ohashi Yoshihiko, Aoki Shigeru, Matsumura Yoshimasa, Sugiyama Shin, Kanna Naoya, Sakakibara Daiki, Fukamachi Yasushi
    The Seventh Symposium on Polar Science  2016/12  Tachikawa, Japan
  • Changes in seabird density relative to oceanographic gradients in the glacial fjord in northwestern Greenland  [Not invited]
    Nishizawa Bungo, Kanna Naoya, Ohashi Yoshihiko, Sakakibara Daiki, Asaji Izumi, Sugiyama Shin, Fukamachi Yasushi, Watanuki Yutaka
    The Seventh Symposium on Polar Science  2016/12  Tachikawa, Japan
  • Turbid water and chlorophyll a distributions near the interface of the ocean and a tidewater glacier in northwest Greenland  [Not invited]
    Kanna Naoya, Sugiyama Shin, Ohashi Yoshihiko, Sakakibara Daiki, Nishizawa Bungo, Asaji Izumi, Fukamachi Yasushi
    The Seventh Symposium on Polar Science  2016/12  Tachikawa, Japan
  • Interannual variabilties of fluxes in Barrow Canyon from 2010-2014 : results from the DBO-5 repeat section  [Not invited]
    Itoh Motoyo, Kikuchi Takashi, Fukamachi Yasushi, Pickart Robert and collaborators
    2016 PAG Fall Meeting  2016/10  Qingdao, China
  • Formation and Variability of Antarctic Bottom Water off Cape Darnley: the Fourth Antarctic Bottom Water  [Not invited]
    Ohshima, K. I., Nakayama, Y., Fukamachi, Y., Matsumura, Y., Nihashi, S., Tamura, T., Kitade, Y., Hirano, D., Shimizu, D., and Aoki S.
    2016 AGU Ocean Sciences Meeting  2016/02  New Orleans, USA
  • Observations of frazil ice formation and sediment upward transport off the northeast coast of Sakhalin  [Not invited]
    Ito M, Ohshima, K. I., Nishioka, J., Kusumoto, Y., Mizuta, G., Fukamachi, Y.
    The 31th International Symposium on Okhotsk Sea & Sea Ice  2016/02  Monbetsu, Japan
  • Validation of AMSR-E thin ice algorithm based on moored ice profiling sonar measurement  [Not invited]
    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  2016/01  Tromsø, Norway
  • Sea ice formation on continental shelves: a comparison of water mass signals near an Antarctic ice shelf and off the Alaskan coast  [Not invited]
    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  2015/08  Cambridge, UK
  • Numerical Investigation of Formation and Variability of Antarctic Bottom Water off Cape Darnley  [Not invited]
    Nakayama, Y., Ohshima, K. I., Matsumura, Y., Fukamachi, Y., Hiroyasu, H.
    26th IUGG General Assembly 2015  2015/07  Prague, Czech Republic
  • The fourth Antarctic Bottom Water: Cape Darnley Bottom Water  [Not invited]
    Ohshima, K. I., Fukamachi, Williams, G. D., Nihashi, S., Tamura, T., Kitade, Y., Hirano, D., Aoki, S., and Wakatsuchi, M.
    26th IUGG General Assembly 2015  2015/07  Prague, Czech Republic
  • A wind-driven, hybrid latent and sensible heat coastal polynya at Barrow, Alaska  [Not invited]
    Hirano, D., Y. Fukamachi, E. Watanabe, K. Iwamoto, A. R. Mahoney, H. Eicken, D. Simizu, K. I. Ohshima, and T. Tamura
    26th IUGG General Assembly 2015  2015/06  Prague, Czech Republic
  • Sediment upward dispersion and frail ice formation by strong wnd events -A possible mechanism of iron supply to sea ice  [Not invited]
    Ito, M., K. I. Ohshima, J. Nishioka, Y. Kusumoto, G. Mizuta, Y. Fukamachi
    ESSAS Annual Science Meeting  2015/06  Seattle, USA
  • Characteristics of sea-ice draft revealed by a moored ice-profiling sonar in the Chukchi Sea off Barrow, Alaska  [Not invited]
    Fukamachi. Y., Simizu, D., Ohshima, K. I., Iwamoto, K., Eicken, H., Mahoney, A. R.
    Fourth International Symposium on the Arctic Research (ISAR-4)  2015/04  Toyama
  • A wind-driven, hybrid latent and sensible heat coastal polynya at Barrow, Alaska  [Not invited]
    Hirano, D., Y. Fukamachi, E. Watanabe, K. Iwamoto, A. R. Mahoney, H. Eicken, D. Simizu, K. I. Ohshima, and T. Tamura
    Forth International Symposium on the Arctic Research (ISAR-4)  2015/04  Toyama
  • SIZONet: Multi-purpose, multi-platform observations to inform responses to an Arctic sea ice cover in transformation  [Not invited]
    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)  2015/04  Toyama
  • 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-  [Not invited]
    Ito, M., Ohshima, K. I., Nishioka, J., Kusumoto, Y., Mizuta, G. and Fukamachi, Y.
    The 30th International Symposium on Okhotsk Sea & Sea Ice  2015/02  Monbetsu, Japan
  • A wind-driven, hybrid latent and sensible heat coastal polynya at Barrow, Alaska  [Not invited]
    Hirano, D., Y. Fukamachi, E. Watanabe, K. Iwamoto, A. Mahoney, H. Eicken, D. Shimizu, K. I. Ohshima, and T. Tamura
    AGU Fall Meeting 2014  2014/11  San Francisco, USA
  • Antarctic Bottom Water production from intense sea-ice formation in the Cape Darnley Polynya  [Invited]
    Ohshima, K. I., Y. Fukamachi, G. D. Williams, S. Nihashi, T. Tamura, Y. Kitade, D. Hirano, S. Aoki, and M. Wakatsuchi
    11th Annual Meeting, Asia Oceania Geosciences Society  2014/08  Sapporo, Japan
  • Antarctic and Arctic land-fast sea ice: deriving parent water mass properties changes from sea ice cores  [Not invited]
    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, and T. G. Haskell
    IGS International Symposium on Sea Ice in a Changing Environment  2014/03  Hobart, Australia
  • Characteristics of sea-ice draft revealed by a moored ice-profiling sonar in the Chukchi Sea off Barrow, Alaska  [Not invited]
    Y. Fukamachi, D. Simizu, K. I. Ohshima, K. Iwamoto, H. Eicken, and A. R. Mahoney
    IGS International Symposium on Sea Ice in a Changing Environment  2014/03  Hobart, Australia
  • 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  [Not invited]
    A. R. Mahoney, H. Eicken, Y. Fukamachi, K. I. Ohshima, D. Simizu, C. Kambhamettu, R. MV, S. Hendricks, and J. Jones
    IGS International Symposium on Sea Ice in a Changing Environment  2014/03  Hobart, Australia
  • A study of formation processes of supercooled water and frazil ice in a coastal polynya  [Not invited]
    Ito M, K. I. Ohshima, Y. Fukamachi, D. Simizu, K. Iwamoto, Y. Matsumura, A. R. Mahoney, and H. Eicken
    IGS International Symposium on Sea Ice in a Changing Environment  2014/03  Hobart, Australia
  • Distribution and interannual variability of sea-ice thickness in the pack-ice zone off Lützow-Holm Bay, Antarctica  [Not invited]
    F. Sugimoto, H. Shimoda, D. Simizu, S. Uto, K. Tateyama, S. Hoshino, T. Ozeki, T. Tamura, Y. Fukamachi, S. Ushio and K. I. Ohshima
    IGS International Symposium on Sea Ice in a Changing Environment,  2014/03  Hobart, Australia
  • A study of formation processes of supercooled water and frazil ice in a coastal polynya  [Not invited]
    Ito M, K. I. Ohshima, Y. Fukamachi, D. Simizu, K. Iwamoto, Y. Matsumura, A. R. Mahoney, and H. Eicken
    The 29th International Symposium on Okhotsk Sea & Sea Ice  2014/02

Research Grants & Projects

  • Ministry of Education, Culture, Sports, Science and Technology:Grant-in-Aid for Scientific Research (基盤研究(B))
    Date (from‐to) : 2019 -2022 
    Author : FUKAMACHI Yasushi
  • Ministry of Education, Culture, Sports, Science and Technology:Grants-in-Aid for Scientific Research(基盤研究(B))
    Date (from‐to) : 2015 -2018 
    Author : FUKAMACHI Yasushi
  • Ministry of Education, Culture, Sports, Science and Technology:Grants-in-Aid for Scientific Research(基盤研究(A))
    Date (from‐to) : 2013 -2016 
    Author : Kiichiro OHSHIMA
  • Ministry of Education, Culture, Sports, Science and Technology:Grants-in-Aid for Scientific Research(基盤研究(B))
    Date (from‐to) : 2013 -2016 
    Author : Shigeru AOKI
  • Ministry of Education, Culture, Sports, Science and Technology:Grants-in-Aid for Scientific Research(基盤研究(B))
    Date (from‐to) : 2011 -2013 
    Author : 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:Grants-in-Aid for Scientific Research(挑戦的萌芽研究)
    Date (from‐to) : 2011 -2013 
    Author : 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:Grants-in-Aid for Scientific Research(基盤研究(B))
    Date (from‐to) : 2009 -2012 
    Author : Shigeru AOKI
  • Ministry of Education, Culture, Sports, Science and Technology:Grants-in-Aid for Scientific Research(基盤研究(S))
    Date (from‐to) : 2008 -2012 
    Author : Kiichiro OHSHIMA
     
    北海道大学(抄録なし)
  • Ministry of Education, Culture, Sports, Science and Technology:Grants-in-Aid for Scientific Research(基盤研究(C))
    Date (from‐to) : 2008 -2010 
    Author : Yasushi FUKAMACHI
     
    北海道大学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:Grants-in-Aid for Scientific Research(基盤研究(B))
    Date (from‐to) : 2005 -2007 
    Author : Masaaki WAKATSUCHI
     
    北海道大学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:Grants-in-Aid for Scientific Research(基盤研究(B))
    Date (from‐to) : 2005 -2007 
    Author : Keiichiro OHSHIMA
     
    北海道大学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:Grants-in-Aid for Scientific Research(基盤研究(C))
    Date (from‐to) : 2005 -2007 
    Author : Yasushi FUKAMACHI
     
    北海道大学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:Grants-in-Aid for Scientific Research(基盤研究(B))
    Date (from‐to) : 2003 -2005 
    Author : Kunio SHIRASAWA
     
    北海道大学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:Grants-in-Aid for Scientific Research(基盤研究(C))
    Date (from‐to) : 1997 -1999 
    Author : Keiichirou OHSHIMA
     
    北海道大学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:Grants-in-Aid for Scientific Research(基盤研究(B))
    Date (from‐to) : 1997 -1998 
    Author : Takeshi NAKATSUKA
     
    北海道大学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:Grants-in-Aid for Scientific Research(一般研究(B), 基盤研究(B))
    Date (from‐to) : 1995 -1997 
    Author : Masaaki WAKATSUCHI
     
    北海道大学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...

Educational Activities

Teaching Experience

  • Advanced Course in Atmospheric and Oceanographic Data Analysis
    開講年度 : 2017
    課程区分 : 修士課程
    開講学部 : 環境科学院
    キーワード : データ解析,統計,大気,海洋,気候 Data analysis,Statistics,Atmosphere,Ocean,Climate
  • Inter-Graduate School Classes(Educational Program):Antarctic Science
    開講年度 : 2017
    課程区分 : 修士課程
    開講学部 : 大学院共通科目
    キーワード : 海氷、物理、生物、生態系、ブライン、植物プランクトン、動物プランクトン、サロマ湖、オホーツク海
  • Inter-Graduate School Classes(General Subject):Natural and Applied Sciences
    開講年度 : 2017
    課程区分 : 修士課程
    開講学部 : 大学院共通科目
    キーワード : 北極、地球観測
  • Freshman Seminar
    開講年度 : 2017
    課程区分 : 学士課程
    開講学部 : 全学教育
    キーワード : 南極、北極海、オホーツク海、海洋大循環、気候変動、海氷、温暖化、衛星観測、IPCC
  • Freshman Seminar
    開講年度 : 2017
    課程区分 : 学士課程
    開講学部 : 全学教育
    キーワード : 南極、雪氷学、地球環境学、氷床、アイスコア、気象、海洋、海氷

Committee Membership

  • 2007 - Today   Polar Science (Elsevier)   Associate Editor
  • 2006 - Today   CLIVAR/CliC/SCAR Southern Ocean Region Implementation Panel   Panel member


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