World's Best Scientists 2026 revealed!
Kay I. Ohshima

Kay I. Ohshima

D-Index & Metrics

Earth Science

D-Index
44
Citations
7399
World Ranking
4710
National Ranking
118

Overview

Kay I. Ohshima is affiliated with Hokkaido University in Japan. Their research expertise primarily lies within the field of Earth and Planetary Sciences, with specific contributions spanning Atmospheric Science, Oceanography, Environmental Chemistry, Global and Planetary Change, and Geology.

The scientist's work addresses key topics such as Arctic and Antarctic ice dynamics, cryospheric studies and observations, oceanographic and atmospheric processes, methane hydrates and related phenomena, climate change and permafrost, geology and paleoclimatology research, as well as marine and coastal ecosystems.

Recent publications by Kay I. Ohshima include:

  • Mapping of Active Frazil for Antarctic Coastal Polynyas, With an Estimation of Sea-Ice Production (2021, Geophysical Research Letters)
  • High-resolution mapping of circum-Antarctic landfast sea ice distribution, 2000-2018 (2020, Earth System Science Data)
  • Eighteen-year record of circum-Antarctic landfast-sea-ice distribution allows detailed baseline characterisation and reveals trends and variability (2021, The Cryosphere)
  • Strong ice-ocean interaction beneath Shirase Glacier Tongue in East Antarctica (2020, Nature Communications)
  • Observing Antarctic Bottom Water in the Southern Ocean (2023, Frontiers in Marine Science)

The scientist frequently collaborates with other researchers. Their notable coauthors include:

  • Takeshi Tamura (9 joint publications)
  • Kazuki Nakata (8 joint publications)
  • Vigan Mensah (8 joint publications)
  • Yasushi Fukamachi (8 joint publications)
  • Masato Ito (7 joint publications)

Kay I. Ohshima has published extensively in several scientific journals, with frequent contributions to:

  • Journal of Oceanography (6 publications)
  • Journal of Geophysical Research Oceans (5 publications)
  • Progress In Oceanography (4 publications)
  • Journal of Atmospheric and Oceanic Technology (3 publications)
  • Geophysical Research Letters (2 publications)

Best Publications

  • Mapping of sea ice production for Antarctic coastal polynyas

    Takeshi Tamura;Kay I. Ohshima;Sohey Nihashi

  • Antarctic Bottom Water production by intense sea-ice formation in the Cape Darnley polynya

    Kay I. Ohshima;Yasushi Fukamachi;Guy D. Williams;Sohey Nihashi

  • Circumpolar Mapping of Antarctic Coastal Polynyas and Landfast Sea Ice: Relationship and Variability

    Sohey Nihashi;Kay I. Ohshima

  • The suppression of Antarctic bottom water formation by melting ice shelves in Prydz Bay

    G. D. Williams;L. Herraiz-Borreguero;Fabien Roquet;T. Tamura

  • Near-surface circulation and tidal currents of the Okhotsk Sea observed with satellite-tracked drifters

    Kay I. Ohshima;Masaaki Wakatsuchi;Yasushi Fukamachi;Genta Mizuta

  • Distribution and formation of Okhotsk Sea Intermediate Water: An analysis of isopycnal climatological data

    Motoyo Itoh;Kay I. Ohshima;Masaaki Wakatsuchi

  • Sea ice production variability in Antarctic coastal polynyas

    Takeshi Tamura;Takeshi Tamura;Kay I. Ohshima;Alexander D. Fraser;Alexander D. Fraser;Guy D. Williams

  • Mapping of sea ice production in the Arctic coastal polynyas

    Takeshi Tamura;Takeshi Tamura;Kay I. Ohshima

  • The flow system in the Japan Sea caused by a sea level difference through shallow straits

    Kay I. Ohshima

  • Warming and oxygen decrease of intermediate water in the northwestern North Pacific, originating from the Sea of Okhotsk, 1955–2004

    Takuya Nakanowatari;Kay I. Ohshima;Masaaki Wakatsuchi

  • Estimation of Thin Ice Thickness and Detection of Fast Ice from SSM/I Data in the Antarctic Ocean

    Takeshi Tamura;Kay I. Ohshima;Thorsten Markus;Donald J. Cavalieri

  • Global view of sea-ice production in polynyas and its linkage to dense/bottom water formation

    Kay I. Ohshima;Sohey Nihashi;Katsushi Iwamoto

  • Structure and Seasonal Variability of the East Sakhalin Current

    Genta Mizuta;Yasushi Fukamachi;Kay I. Ohshima;Masaaki Wakatsuchi

  • Evidence for ice-ocean albedo feedback in the Arctic Ocean shifting to a seasonal ice zone

    Haruhiko Kashiwase;Haruhiko Kashiwase;Kay I. Ohshima;Sohey Nihashi;Hajo Eicken

  • Thickness and production of sea ice in the Okhotsk Sea coastal polynyas from AMSR‐E

    Sohey Nihashi;Kay I. Ohshima;Takeshi Tamura;Yasushi Fukamachi

  • Potential regime shift in decreased sea ice production after the Mertz Glacier calving.

    T. Tamura;T. Tamura;G. D. Williams;A. D. Fraser;K. I. Ohshima

  • Physical, structural, and isotopic characteristics and growth processes of fast sea ice in Lützow‐Holm Bay, Antarctica

    T. Kawamura;K. I. Ohshima;T. Takizawa;S. Ushio

  • Seasonal Variations of Water Masses and Sea Level in the Southwestern Part of the Okhotsk Sea

    Motoyo Itoh;Kay I. Ohshima

  • Seasonal variations of the Antarctic coastal ocean in the vicinity of Lützow-Holm Bay

    Kay I. Ohshima;Takatoshi Takizawa;Shuki Ushio;Toshiyuki Kawamura

  • Improved mapping of sea ice production in the Arctic Ocean using AMSR‐E thin ice thickness algorithm

    Katsushi Iwamoto;Kay I. Ohshima;Takeshi Tamura;Takeshi Tamura

Frequent Co-Authors

Takeshi Tamura
Takeshi Tamura National Institute of Polar Research
Masaaki Wakatsuchi
Masaaki Wakatsuchi Hokkaido University
Hajo Eicken
Hajo Eicken Alfred Wegener Institute for Polar and Marine Research
Guy D. Williams
Guy D. Williams University of Tasmania
Robert A. Massom
Robert A. Massom Australian Antarctic Division
Stephen C. Riser
Stephen C. Riser University of Washington
Sascha Willmes
Sascha Willmes University of Trier
Hiroyasu Hasumi
Hiroyasu Hasumi University of Tokyo
Fabien Roquet
Fabien Roquet University of Gothenburg
Mark A. Hindell
Mark A. Hindell University of Tasmania

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