SEARCH

Search Details

Minowa Masahiro

Institute of Low Temperature Science　Frontier Ice and Snow ScienceAssistant Professor

　地球環境変動のペースメーカーである，氷河や氷床に関する研究を北海道大学低温科学研究所の氷河氷床グループに所属し行っています. 当研究室では，氷河氷床の変動理解の為であれば手法をいとわず利用しています．GNSS，氷震，水面波，写真測量，氷レーダー，無人飛行機/水上艇といった装置を使って現地観測をしたり，人工衛星や航空機で測定したリモートセンシングデータを使って研究を進めています. 最近は，得られたデータからより深い洞察を得るために，数値モデルを活用し研究も進めています．GNSSや氷温センサー，氷レーダーの開発にも取り組み，新技術を用いてオンリーワンとなる研究成果を挙げたいと思っています．

　一緒に氷河や氷床の変動メカニズムを研究してみませんか？学生，ポスドクを随時募集しております．お気軽にご連絡ください．

 

Researcher basic information

■ Degree
  • PhD, Hokkaido University, Mar. 2017
■ URL
researchmap URLホームページURL■ Various IDs
J-Global ID■ Research Keywords and Fields
Research Keyword
  • calving
  • Glaciology
  • Patagonia
  • Antarctic Ice Sheet
  • Greenland Ice Sheet
  • Third pole
  • In-situ observation
  • Remote Sensing
  • Numerical modeling
Research Field
  • Environmental Science/Agriculture Science, Environmental dynamic analysis
  • Natural Science, Atmospheric and hydrospheric sciences
■ Educational Organization

Career

■ Career
Career
  • Aug. 2021 - Present
    Hokkaido University, Institute of Low Temperature Science, Assistant Professor, Japan
Educational Background
  • Apr. 2012 - Mar. 2017, Hokkaido University, Faculty of Environmental Earth Science, Japan
Committee Memberships
  • Apr. 2026 - Present
    IPY-5 Japan National Committee
  • Jan. 2024 - Present
    IASC Cryosphere Working Group, IASC Cryosphere Working Group
  • Jan. 2023 - Present
    日本雪氷学会 北海道支部, 研究発表会担当理事
  • Jun. 2024 - Oct. 2025
    ISAR-8：プログラム小委員会
  • Sep. 2022 - Sep. 2025
    日本雪氷学会, 氷河分科会 広報幹事, Society
  • Apr. 2022 - Dec. 2022
    日本雪氷学会 北海道支部, 雪氷教育担当理事

Research activity information

■ Papers
  • Acceleration of an Antarctic outlet glacier driven by surface meltwater input to the base
    Shin Sugiyama; Ken Kondo; Masahiro Minowa; Akira Watanabe
    Nature Communications, 06 May 2026
    Scientific journal
  • Triggering mechanisms of dynamic mass loss at a freshwater-calving glacier in southern Patagonia
    Masahiro Minowa; Pedro Skvarca; Koji Fujita; Nozomu Naito; Shin Sugiyama
    Earth and Planetary Science Letters, 681, 119930, 119930, Elsevier BV, May 2026, [Peer-reviewed], [Lead author, Corresponding author]
    English, Scientific journal, 36786495
  • Localized Calving Sensitivity at Perito Moreno Glacier (Patagonia) Revealed by Seismic Template Matching and Time‐Lapse Images
    Leoncio Cabrera; Edgardo Casanova; Rogelio Torres; Sergio Ruiz; Valeria Rojas; Masahiro Minowa; Douglas A. Wiens; Gino Casassa; Andreaw Rifo
    Journal of Geophysical Research: Earth Surface, Apr. 2026
    Scientific journal
  • Shortwave Penetration Drive Subsurface Warming and Melt on Langhovde Glacier, East Antarctica
    Jun Saito; Masahiro Minowa
    14 Mar. 2026
  • QFuego-Patagonia: a comprehensive glacier-related dataset for Patagonia and Tierra del Fuego, South America
    David Farías-Barahona; Matthias H. Braun; Marius Schaefer; Shin Sugiyama; Andrés Rivera; Gino Casassa; Valentina Peña-Santibañez; Johannes J. Fürst; Franziska Temme; Ilaria Tabone; Masamu Aniya; Jan Erik Arndt; Rodrigo Aguayo; Sebastien Bertrand; Norbert Blindow; Francisca Bown; Claudio Bravo; Tomas Carrasco-Escaff; Camila Cáceres; Bethan Davies; Inés Dussaillant; Daniel Falaschi; Alfonso Fernández; Guisella Gacitúa; Ricardo Giesecke; Neil Glasser; Shuntaro Hata; Jorge Huenante; Inigo Irarrazaval; Pablo Iribarren; Eñaut Izagirre; Lukas Langhamer; Thomas Loriaux; Pamela Maldonado; Philipp Malz; Luciano Mendoza; Morgan McDonnell; Wolfgang H. Meier; Romain Millan; Masahiro Minowa; Michał Pętlicki; Andreas Richter; Lucas Ruiz; Tobias Sauter; Ryan Wilson
    Journal of Glaciology, 1, 17, Cambridge University Press (CUP), 27 Nov. 2025
    Scientific journal
  • The foundations of the Patagonian icefields
    Johannes J. Fürst; David Farías-Barahona; Norbert Blindow; Gino Casassa; Guisella Gacitúa; Michèle Koppes; Emanuele Lodolo; Romain Millan; Masahiro Minowa; Jérémie Mouginot; Michał Pȩtlicki; Eric Rignot; Andres Rivera; Pedro Skvarca; Martin Stuefer; Shin Sugiyama; José Uribe; Rodrigo Zamora; Matthias H. Braun; Fabien Gillet-Chaulet; Philipp Malz; Wolfgang J.-H. Meier; Marius Schaefer
    Communications Earth & Environment, 5, 1, Springer Science and Business Media LLC, 22 Mar. 2024
    Scientific journal, Abstract

    The two vast Patagonian icefields are a global hotspot for ice-loss. However, not much is known about the total ice volume they store - let alone its spatial distribution. One reason is that the abundant record of direct thickness measurements has never been systematically exploited. Here, this record is combined with remotely-sensed information on past ice thickness mapped from glacier retreat. Both datasets are incorporated in a state-of-the-art, mass-conservation approach to produce a well-informed map of the basal topography beneath the icefields. Its major asset is the reliability increase of thicknesses values along the many marine- and lake-terminating glaciers. For these, frontal ice-discharge is notably lower than previously reported. This finding implies that direct climatic control was more influential for past ice loss. We redact a total volume for both icefields in 2000 of 5351 km3. Despite the wealth of observations used in this assessment, relative volume uncertainties remain elevated.
  • Foehn winds influence surface ablation on Glaciar Perito Moreno, Southern Patagonian Icefield
    Masahiro Minowa; Pedro Skvarca; Koji Fujita
    Journal of Glaciology, 1, 33, Cambridge University Press (CUP), 04 Jan. 2024, [Peer-reviewed], [Lead author, Corresponding author]
    English, Scientific journal

    Download
  • Ploughmeter for subglacial observations with an accelerometer and a water pressure sensor
    Ken KONDO; Shin SUGIYAMA; Masahiro MINOWA; Evgeny A. PODOLSKIY
    Bulletin of Glaciological Research, 42, 113, 121, Japanese Society of Snow and Ice, 2024
    Scientific journal
  • SE‐Dome II Ice Core Dating With Half‐Year Precision: Increasing Melting Events From 1799 to 2020 in Southeastern Greenland
    Kaoru Kawakami; Yoshinori Iizuka; Mahiro Sasage; Mai Matsumoto; Takeshi Saito; Akira Hori; Sakiko Ishino; Shuji Fujita; Koji Fujita; Keita Takasugi; Takumi Hatakeyama; Saaya Hamamoto; Akihisa Watari; Nao Esashi; Miu Otsuka; Ryu Uemura; Kazuho Horiuchi; Masahiro Minowa; Shohei Hattori; Teruo Aoki; Motohiro Hirabayashi; Kenji Kawamura; Sumito Matoba
    Journal of Geophysical Research: Atmospheres, 128, 20, American Geophysical Union (AGU), 13 Oct. 2023, [Peer-reviewed]
    Scientific journal, Abstract

    Arctic warming has accelerated surface melting even in the highland areas of the Greenland ice sheet (GrIS). Understanding the relationship between climate and surface melting is essential for improving the estimates of ice‐sheet mass loss due to warming. Here we analyze a 250 m‐long ice core from the southeastern dome of GrIS (SE‐Dome site; 67°19′17″ N, 36°47′03″ W, 3,161 m a.s.l.), where the annual mean temperature is −20.9°C and the accumulation rate is high and there is a large discrepancy among climate models regarding snow accumulation estimates. A time scale was established for 1799–2020 with a half‐year uncertainty using annual counting of H2O2 concentration and five time horizons determined by electrical conductivity, melt events, and tritium concentration. The annual accumulation rate from the ice core shows no significant trend over 221 years and has an average of 1.04 ± 0.20 m w.e. year−1. In contrast, the frequency and thickness of refrozen melt layer (ML) have increased over 221 years, and are synchronized with temperature changes in the Arctic. The thickness of MLs correlates positively with the time‐integrated summer temperature anomaly using a reanalysis of air temperature. The in‐situ accumulation records in the southeastern GrIS provide an important basis for correcting reanalysis data such as ERA5, which in turn are valuable for improving regional climate models.
  • Tidal and thermal stresses drive fracture of the ice shelf of Langhovde Glacier, East Antarctica
    箕輪昌紘; Evgeny Podolskiy; 杉山慎
    Annual Report on Snow and Ice Studies in Hokkaido, 42, Sep. 2023, [Lead author, Corresponding author]
    Japanese, 36786495

    Download
  • Effects of topography on dynamics and mass loss of lake-terminating glaciers in southern Patagonia
    Masahiro Minowa; Marius Schaefer; Pedro Skvarca
    Journal of Glaciology, 1, 18, Cambridge University Press ({CUP}), 11 Jul. 2023, [Peer-reviewed], [Lead author, Corresponding author]
    English, Scientific journal, Abstract
    Calving glaciers are highly sensitive to bedrock geometry near their terminus. To understand the mechanisms controlling rapid calving glaciers’ mass loss, we measured the lake topography in front of four lake-terminating glaciers in the southern Patagonian icefield. Using remotely sensed surface elevation data, we calculated flotation height and surface slope and compared those with changes in ice-front position, surface speed and surface elevation. Rapid retreat accompanied by rapid flow acceleration and ice surface steepening was observed at Glaciar Upsala from 2008–2011, and at O'Higgins and Viedma glaciers from 2016–present. Surface lowering in the lower part of Glaciar Upsala reached 30 m a−1 and was 18 m a−1 and 12 m a−1 at O'Higgins and Viedma glaciers, respectively. Near- or super-buoyant conditions were observed prior to these events, leading to gradual flow acceleration due to low effective pressure and decoupling from the bed. The super-buoyant condition and gradual acceleration imply full-thickness buoyant calving, which causes the ice front to retreat from the shallow bedrock topography with substantial flow acceleration. We conclude that the buoyancy force plays an important role in the rapid mass loss of lake-terminating glaciers in southern Patagonia., 36786495

    Download
  • Climate and Surface Mass Balance at Glaciar Perito Moreno, Southern Patagonia
    Masahiro Minowa; Pedro Skvarca; Koji Fujita
    Journal of Climate, 36, 2, 625, 641, American Meteorological Society, 15 Jan. 2023, [Peer-reviewed], [Lead author, Corresponding author]
    English, Scientific journal, Abstract

    The mass budget of southern Patagonian glaciers is characterized by an extreme amount of surface ablation. To understand the processes controlling surface mass balance, we analyzed in situ data including meteorological variables and ablation stakes for the 25 years between 1996 and 2020 near the terminus of Glaciar Perito Moreno in southern Patagonia in South America. The mean annual temperature has increased over the study period at a rate of 0.2°C decade−1. An energy-balance model was applied to calculate a point surface mass balance, based on meteorological records. The average point surface mass balance is estimated to be −16.3 m water equivalent (w.e.) yr−1 between 1996 and 2020, decreasing at a rate in the range from −0.4 to −0.9 m w.e. yr−1 decade−1. The greatest contribution to the surface energy balance was due to the sensible heat flux, and its variation drove the surface mass balance variation. The meteorological and surface mass balance records were compared with the Southern Annular Mode and El Niño–Southern Oscillation, which change the atmospheric circulation over southern Patagonia and influence surface mass balance near the terminus of the glacier. Our long-term dataset investigates the detailed meteorological conditions and surface mass balance and their connection with the large-scale climate variability over the last 25 years, reported for the first time in Patagonia., 34345681

    Download
  • 利尻島ヤムナイ沢雪渓における 2021 年現地調査報告
    波多 俊太郎; 杉山 慎; 箕輪 昌紘; 日下 稜; 近藤 研; Wang Yefa; 渡邊 果歩
    北海道の雪氷, 41, 39, 42, 2022
    Japanese
  • Direct observation of basal sliding beneath Langhovde Glacier, East Antarctica
    近藤研; 近藤研; 杉山慎; 箕輪昌紘
    雪氷研究大会講演要旨集(Web), 2022, 41, 35, 38, 2022
    Japanese
  • Hot-water drilling at Langhovde Glacier in Antarctica in 2021/22
    杉山慎; 近藤研; 近藤研; 箕輪昌紘
    雪氷研究大会講演要旨集(Web), 2022, 41, 31, 34, 2022
    Japanese
  • 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, [Peer-reviewed]
    English, Scientific journal, AbstractWater 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.
  • Ice core drilling and the related observations at the SE-Dome site, southeastern Greenland Ice Sheet
    Y. Iizuka; S. Matoba; M. Minowa; T. Yamasaki; K. Kawakami; A. Kakugo; M. Miyahara; K. Fujita; A. Hashimoto; M. Niwano; T. Tanikawa; T. Aoki
    Bulletin of Glaciological Research, 39, 1, 12, Japanese Society of Snow and Ice, Oct. 2021, [Peer-reviewed]
    English, Scientific journal

    Download
  • Thermohaline structure and circulation beneath the Langhovde Glacier ice shelf in East Antarctica
    Masahiro Minowa; Shin Sugiyama; Masato Ito; Shiori Yamane; Shigeru Aoki
    NATURE COMMUNICATIONS, 12, 1, Jul. 2021, [Peer-reviewed], [Lead author, Corresponding author]
    English, Scientific journal

    Download
  • Variations in mineralogy of dust in an ice core obtained from northwestern Greenland over the past 100 years
    Naoko Nagatsuka; Kumiko Goto-Azuma; Akane Tsushima; Koji Fujita; Sumito Matoba; Yukihiko Onuma; Remi Dallmayr; Moe Kadota; Motohiro Hirabayashi; Jun Ogata; Yoshimi Ogawa-Tsukagawa; Kyotaro Kitamura; Masahiro Minowa; Yuki Komuro; Hideaki Motoyama; Teruo Aoki
    CLIMATE OF THE PAST, 17, 3, 1341, 1362, Jun. 2021, [Peer-reviewed]
    English, Scientific journal
  • Frontal ablation and mass loss of the Patagonian icefields
    Masahiro Minowa; Marius Schaefer; Shin Sugiyama; Daiki Sakakibara; Pedro Skvarca
    EARTH AND PLANETARY SCIENCE LETTERS, 561, May 2021, [Peer-reviewed], [Lead author, Corresponding author]
    English, Scientific journal

    Download
  • 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, [Peer-reviewed]
    English, Scientific journal
  • Tide-modulated ice motion and seismicity of a floating glacier tongue in East Antarctica
    Masahiro Minowa; Evgeny A. Podolskiy; Shin Sugiyama
    ANNALS OF GLACIOLOGY, 60, 79, 57, 67, Sep. 2019, [Peer-reviewed], [Lead author]
    English, Scientific journal

    Download
  • Subglacial water pressure and ice-speed variations at Johnsons Glacier, Livingston Island, Antarctic Peninsula
    Shin Sugiyama; Francisco J. Navarro; Takanobu Sawagaki; Masahiro Minowa; Takahiro Segawa; Yukihiko Onuma; Jaime Otero; Evgeny V. Vasilenko
    JOURNAL OF GLACIOLOGY, 65, 252, 689, 699, Aug. 2019, [Peer-reviewed]
    English, Scientific journal
  • Calving flux estimation from tsunami waves
    Masahiro Minowa; Evgeny A. Podolskiy; Guillaume Jouvet; Yvo Weidmann; Daiki Sakakibara; Shun Tsutaki; Riccardo Genco; Shin Sugiyama
    EARTH AND PLANETARY SCIENCE LETTERS, 515, 283, 290, Jun. 2019, [Peer-reviewed], [Lead author]
    English, Scientific journal

    Download
  • Response of the flow dynamics of Bowdoin Glacier, northwestern Greenland, to basal lubrication and tidal forcing
    Hakime Seddik; Ralf Greve; Daiki Sakakibara; Shun Tsutaki; Masahiro Minowa; Shin Sugiyama
    JOURNAL OF GLACIOLOGY, 65, 250, 225, 238, Apr. 2019, [Peer-reviewed]
    English, Scientific journal
  • Underwater Ice Terrace Observed at the Front of Glaciar Grey, a Freshwater Calving Glacier in Patagonia
    Shin Sugiyama; Masahiro Minowa; Marius Schaefer
    GEOPHYSICAL RESEARCH LETTERS, 46, 5, 2602, 2609, Mar. 2019, [Peer-reviewed]
    English, Scientific journal
  • Glaciological traverse across the Southern Patagonian Icefield
    Masahiro Minowa; Marius Schaefer; Pedro Skvarca; Sumito Matoba; GuiseIla Gacitua
    BULLETIN OF GLACIOLOGICAL RESEARCH, 37, 47, 56, 2019, [Peer-reviewed], [Lead author]
    English, Scientific journal

    Download
  • Glacier calving observed with time-lapse imagery and tsunami waves at Glaciar Perito Moreno, Patagonia
    Masahiro Minowa; Evgeny A. Podolskiy; Shin Sugiyama; Daiki Sakakibara; Pedro Skvarca
    JOURNAL OF GLACIOLOGY, 64, 245, 362, 376, Jun. 2018, [Peer-reviewed], [Lead author]
    English, Scientific journal

    Download
  • Variations in mineralogy of dust in ice core obtained from Northwestern Greenland Ice Sheet
    Nagatsuka Naoko; Goto-Azuma Kumiko; Tsushima Akane; Motoyama Hideaki; Matoba Sumito; Fujita Koji; Yamasaki Tetsuhide; Onuma Yukihiko; Minowa Masahiro; Aoki Teruo
    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research, 2017, 119, 119, The Japanese Society of Snow and Ice / Japan Society for Snow Engineering, 2017
    Japanese
  • Seismic and infrasound monitoring of Bowdoin Glacier, Greenland
    Podolskiy Evgeny A.; Genco Riccardo; Sugiyama Shin; Walter Fabian; Funk Martin; Minowa Masahiro; Tsutaki Shun; Ripepe Maurizio
    低温科学, 75, 15, 36, 低温科学第75巻編集委員会, 2017
    English, Outlet glaciers in Greenland have retreated and lost mass over the past decade. Understandingthe dynamics of tidewater glaciers is crucial for forecasting sea-level rise and for understanding thefuture of the Greenland Ice Sheet, given the buttressing support that tidewater glaciers provide toinland ice. However, the mechanisms controlling glacier-front location and the role played byexternal forcings (e.g., meltwater input and tidal oscillation) in basal motion and fracture formationleading to iceberg calving are poorly understood. Today it is known that glaciers generate seismicand infrasound signals that are detectable at local and teleseismic distances and can be used to monitorglacier dynamics. Here, we present examples of data recorded by a temporary network of seismicand infrasound instruments deployed at a tidewater glacier (Bowdoin Glacier, Greenland) in July 2015.Some stations were installed on ice at distances as close as ～ 250 m from the calving front,representing the closest deployments to the calving front that have been made to date. Multipleseismic and infrasound events were recorded by five seismic and six infrasound sensors, and linked tosurface crevassing, calving, and ice-cliff collapses, and presumably also hydrofracturing, icebergrotations, teleseismic earthquakes, and helicopter-induced tremors. Using classic seismological andarray analysis approaches (e.g., "short-term averaging/long-term averaging" and "f-k" analysis), as wellas image processing techniques, we explore this unique dataset to understand the glacial response toexternal forcings. Our observations, supported by GPS measurements of ice velocity, local weatherstationrecords, and time-lapse photography, provide a valuable resource for studying seismogenicglacial processes and their dependence on ocean tides and other environmental factors.
  • Seasonal Variations in Ice-Front Position Controlled by Frontal Ablation at Glaciar Perito Moreno, the Southern Patagonia Icefield
    Masahiro Minowa; Shin Sugiyama; Daiki Sakakibara; Pedro Skvarca
    FRONTIERS IN EARTH SCIENCE, 5, Jan. 2017, [Peer-reviewed], [Lead author]
    English, Scientific journal

    Download
  • Thermal structure of proglacial lakes in Patagonia
    Shin Sugiyama; Masahiro Minowa; Daiki Sakakibara; Pedro Skvarca; Takanobu Sawagaki; Yoshihiko Ohashi; Nozomu Naito; Kazuhisa Chikita
    JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE, 121, 12, 2270, 2286, Dec. 2016, [Peer-reviewed]
    English, Scientific journal
  • Tide-modulated ice flow variations drive seismicity near the calving front of Bowdoin Glacier, Greenland
    Evgeny A. Podolskiy; Shin Sugiyama; Martin Funk; Fabian Walter; Riccardo Genco; Shun Tsutaki; Masahiro Minowa; Maurizio Ripepe
    GEOPHYSICAL RESEARCH LETTERS, 43, 5, 2036, 2044, Mar. 2016, [Peer-reviewed]
    English, Scientific journal
  • Reconstruction of climate during the past 157years by analyzing an ice core obtained from Northwestern Greenland Ice Sheet (SIGMA-D)
    Kadota Moe; Matoba Sumito; Motoyama Hideaki; Fujita Koji; Yamasaki Tetsuhide; Onuma Yukihiko; Minowa Masahiro; Komuro Yuki; Aoki Teruo
    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research, 2015, 191, 191, The Japanese Society of Snow and Ice / Japan Society for Snow Engineering, 2015
    Japanese
  • Analysis of the total concentration of metals in the Greenland, SIGMA-D shallow ice core
    Komuro Yuki; Suzuki Toshitaka; Onuma Yukihiko; Minowa Masahiro; Yamasaki Tetsuhide; Matoba Sumito; Fujita Koji; Hirabayashi Motohiro; Motoyama Hideaki; Aoki Teruo
    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research, 2015, 166, 166, The Japanese Society of Snow and Ice / Japan Society for Snow Engineering, 2015
    Japanese
  • Glaciological and meteorological observations at the SIGMA-D site, northwestern Greenland Ice Sheet
    Sumito Matoba; Hideaki Motoyama; Koji Fujita; Tetsuhide Yamasaki; Masahiro Minowa; Yukihiko Onuma; Yuki Komuro; Teruo Aoki; Satoru Yamaguchi; Shin Sugiyama; Hiroyuki Enomoto
    BULLETIN OF GLACIOLOGICAL RESEARCH, 33, 7, 14, 2015, [Peer-reviewed]
    English, Scientific journal
  • Contrasting glacier variations of Glaciar Perito Moreno and Glaciar Ameghino, Southern Patagonia Icefield
    Masahiro Minowa; Shin Sugiyama; Daiki Sakakibara; Takanobu Sawagaki
    ANNALS OF GLACIOLOGY, 56, 70, 26, 32, 2015, [Peer-reviewed], [Lead author]
    English, Scientific journal

    Download
  • Changes in frontal position and surface elevation of Glacier Perito Moreno and Glacier Ameghino, Patagonia
    Minowa, M.; Sakakibara, D.; Sugiyama, S.; Sawagaki, T.
    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research, 2012, 1, 2012
    Scientific journal
■ Other Activities and Achievements
■ Books and other publications
  • 北極域の研究 : その現状と将来構想
    北極環境研究コンソーシアム長期構想編集委員会; 北極環境研究コンソーシアム, 氷床の氷流出（流動・末端消耗）
    海文堂出版, Mar. 2024, 9784303562304, x, 468p, Japanese, [Contributor]
■ Lectures, oral presentations, etc.
■ Syllabus
  • 地球雪氷学実習Ⅰ, 2024年, 修士課程, 環境科学院
  • 氷河・氷床学特論, 2024年, 修士課程, 環境科学院
  • 大学院共通授業科目（教育プログラム）：南極学, 2024年, 修士課程, 大学院共通科目
  • 地球雪氷学基礎論, 2024年, 修士課程, 環境科学院
■ Affiliated academic society
  • Jun. 2012 - Present
    International Glaciological Society
  • 日本地球惑星連合
  • 日本雪氷学会
■ Research Themes
  • Unraveling spatio-temporal variations of the Antarctic ice sheet mass balance and its governing mechanisms
    Grants-in-Aid for Scientific Research
    01 Apr. 2024 - 31 Mar. 2029
    庭野 匡思; 杉山 慎; 箕輪 昌紘; 津滝 俊
    Japan Society for the Promotion of Science, Grant-in-Aid for Transformative Research Areas (A), Japan, Meteorological Research Institute, 24H02342
  • 南極氷床棚氷における高解像度底面融解量の推定
    南極地域観測 一般研究観測
    Apr. 2025 - Mar. 2029
    国立極地研究所, Principal investigator, AP1010
  • Mechanism of glacier calving and its influence on the glacier fluctuation
    Grants-in-Aid for Scientific Research
    01 Apr. 2022 - 31 Mar. 2025
    箕輪 昌紘
    Japan Society for the Promotion of Science, Grant-in-Aid for Early-Career Scientists, Hokkaido University, 22K14093
  • 汎用型氷レーダーによるデータ取得, 解析, 可視化手法の確立
    ROIS-DS-JOINT
    Jun. 2023 - Mar. 2024
    大学共同利用機関情報・システム研究機構, 低温科学研究所, Principal investigator, 036RP2023
  • Investigation of firn structure and its impacts on glacier runoff in the Greenland Ice Sheet
    Apr. 2022 - Mar. 2024
    箕輪昌紘
    ArCSⅡ, Principal investigator
  • カービング氷河の急速な質量損失メカニズム：現地データに基づいた数値モデリング
    科学研究費助成事業 特別研究員奨励費
    24 Apr. 2020 - 31 Mar. 2023
    箕輪 昌紘
    南米パタゴニアのペリートモレノ氷河、ウプサラ氷河においてアラスカ大学と共同で運用していたインターバルカメラをそれぞれ回収した。2018年の設置以来、2年間の氷河変動を記録することに成功している。その後合計4台のカメラを、近年急速に後退しているヴィエドマ氷河周辺の基盤上に設置しデータ取得を開始した。ペリートモレノ氷河において長期間連続で精密な氷河流動を測定する為に、二周波受信GPSを氷河上に設置し、毎秒の氷河流動を測定し始めた。これらのデータは現地協力者によって随時保守点検やデータ回収が行われている。
    ペリートモレノ氷河で実施している気象観測や氷河表面質量収支の観測データについてデータ解析を推進した。気象の経年変動や表面質量収支モデルによる表面質量収支の計算を実施した。近年にかけて表面融解量が増加する様子が明らかとなった。また、この氷河で計算された質量収支は、南半球の気候を主に制御するエルニーニョ・南方振動や南半球環状モードといった地球規模の気象現象との関係が示唆される結果が得られつつある。
    氷河の末端消耗プロセスを理解するために、氷河流動モデルの構築を行なった。当初はアラスカ大学を訪れ数値モデルの習得を目指していたが、疫病蔓延のため申請者自身で構築を進めた。有限要素法を用いて氷河流線に沿った二次元の力平行方程式を解き、氷河流動と圧力を計算した。計算される氷の歪みより、末端消耗プロセスに関連する主応力やせん断応力が計算できるようになった。
    日本学術振興会, 特別研究員奨励費, 名古屋大学, 20J00526
  • 淡水性カービング氷河の後退に末端消耗が果たす役割の解明
    科学研究費助成事業 特別研究員奨励費
    25 Apr. 2018 - 31 Mar. 2021
    箕輪 昌紘
    日本学術振興会, 特別研究員奨励費, 名古屋大学, 18J00188
  • 急速に後退する氷河・氷床の変動に海・湖が果たす役割の解明
    科学研究費助成事業 特別研究員奨励費
    22 Apr. 2016 - 31 Mar. 2018
    箕輪 昌紘
    パタゴニアのペリート・モレノ氷河においてカービングの測定手法の提案とカービング発生メカニズムについて解析を行った．これまでほとんど用いられていなかった水面波を使うことでカービングの頻度や氷山の体積を定量的に推定できることが提案した．またカービングの発生メカニズムについてはデータの測定期間が短期であったことから十分に考察できなかったが，平均気温と平均カービング発生回数はよく一致しており，今後長期の観測をすることが発生メカニズムを明らかにする上で重要であることが示唆された．これらの研究成果は，Journal of Glaciology誌に投稿し受理された．同様の解析はグリーンランドのボードイン氷河やアラスカのルコンテ氷河でも実施しており，現在研究成果の発表に向け準備中である．
    氷河末端の水中融解の重要性についてパタゴニアの氷河湖で他時期に測定をした水温や濁度を解析することで考察を行った．解析・考察の結果，同じ気候条件であるにも関わらず氷河湖によって水温構造は大きく異なることが明らかとなった．またこの違いには，氷河融解水流出量と湖の深度が重要な影響を持つことが明らかになった．これらの結果は同地域に存在する氷河でも水中融解の重要性は大きく異なる可能性を示唆している．現在研究成果を国際誌への出版に向け準備中である．
    パタゴニアの氷河での一連の研究成果については2017年7月にベルリンで開催された国際シンポジウムで発表を行った．
    日本学術振興会, 特別研究員奨励費, 北海道大学, 16J01860
  • Direct measurement of subaqueous melting at the front of calving glaciers
    Grants-in-Aid for Scientific Research Grant-in-Aid for Challenging Exploratory Research
    01 Apr. 2014 - 31 Mar. 2017
    Sugiyama Shin; SAWAGAKI TAKANOBU; YAMAZAKI SHINTARO; MINOWA MASAHIRO; SAKAKIBARA DAIKI; SCHAEFER MARIUS; SKVARCA PEDRO
    This project aimed to quantify subaqueous melting at the front of calving glaciers by mapping under-water ice geometry using a side-scanning sonar. We operated a sonar (Imagenex Model 872) in proglacial lakes and fjords in Patagonia, Greenland and Antarctica. At the front of Grey Glacier, a freshwater calving glacier in Patagonia, we found the ice front was extending into the lake by 50-100 m under the water surface. Together with water temperature distributions in the lake, our observation implies that ice melting is enhanced near the water surface. Melt rate was not quantified only from the sonar data, but water temperature, turbidity and isotope measurements enabled us to estimate the subaqueous melting rate at the front of Grey Glacier. The results provided new insights into the frontal ablation and evolution of freshwater calving glaciers.
    Japan Society for the Promotion of Science, Grant-in-Aid for Challenging Exploratory Research, Hokkaido University, 26550001
■ Academic and Social Contribution Activities/Other
Media CoverageOthers
  • Oct. 2025 - Nov. 2025
    Glacier observation in Rolwaling, Nepal Himalaya
    https://photos.app.goo.gl/2y9bYeotY1HaNTyk8
  • Oct. 2024 - Nov. 2024
    Rolwaling, Nepal, glaciological observations
    https://photos.app.goo.gl/b64T18uGdmwkGk369
  • Sep. 2024 - Sep. 2024
    南パタゴニア氷原
  • Nov. 2023 - Mar. 2024
    第65次南極観測隊 夏隊
  • Apr. 2023 - Apr. 2023
    南パタゴニア氷原 氷河調査
  • Mar. 2023 - Mar. 2023
    グリーンランド北西部カナック氷帽&トレーシー氷河
    https://photos.app.goo.gl/6tcubU6MsxcV6qnPA
  • Oct. 2022 - Oct. 2022
    Trambau Glacier, Nepal
  • Jun. 2022 - Jul. 2022
    Qaanaaq Ice Cap, Northwest Greenland
  • Oct. 2021 - Apr. 2022
    The 63rd Japanese Antarctic Research Expedition
  • Apr. 2021 - Jun. 2021
    SE-Dome, South Eest Greenland
  • Oct. 2018 - Oct. 2020
    パタゴニア氷原の複数の氷河での水深測量

    Download
  • Oct. 2018 - Oct. 2018
    南パタゴニア氷原涵養域での観測

    Download
  • Nov. 2017 - Mar. 2018
    The 59th Japanese Antarctic Research Expedition
  • Jan. 2017 - Feb. 2017
    グレイ氷河前縁の氷河湖観測
  • Mar. 2016 - Mar. 2016
    ペリートモレノ氷河でのカービング津波観測
  • Jan. 2016 - Feb. 2016
    南極半島リビングストン島での氷河観測
  • Jul. 2015 - Aug. 2015
    グリーンランド北西部ボードイン氷河での氷河観測
  • Oct. 2014 - Oct. 2014
    南パタゴニア氷原での氷河・氷河湖観測
  • Apr. 2014 - Jun. 2014
    グリーンランド北西部SIGMA-Dでのアイスコア掘削
  • Dec. 2013 - Jan. 2014
    南パタゴニア氷原での氷河・氷河湖観測
  • Dec. 2012 - Jan. 2013
    南パタゴニア氷原での氷河観測

    Download