CV

Kay I. Ohshima

Physical Oceanographer, Polar Oceanographer
Professor
Institute of Low Temperature Science Hokkaido University

Kita-19, Nishi-8, Kitaku, Sapporo 060-0819, Japan.
Phone: +81-11-706-5481, Fax: +81-11-706-7362
e-mail: ohshima at lowtem.hokudai.ac.jp

February 2022

Professional Experience:

Professor, Institute of Low Temperature Science, Hokkaido University (2008-Present)
Visiting Scientist, School of Oceanography, University of Washington (2003-2004)
Affiliated Research Scientist, Research Institute for Humanity and Nature (2004-Present)
Associate Professor, Institute of Low Temperature Science, Hokkaido University (1994-2008)
Participated in the 32nd Japanese Antarctic Research Expedition (1990-1992)
Research Associate, Institute of Low Temperature Science, Hokkaido University (1986-1994)

Professional Activities:

Council Member of Oceanographic Society of Japan (2006-Present)
European Space Agency, Principal Investigator for the Earth Observation data (2009-Present)
Japan Aerospace Exploration Agency, Principal Investigator for GCOM Research (2008-Present)
Japan Aerospace Exploration Agency, Principal Investigator for ALOS Research (2007-Present)
Selection Committee Member for the Hidaka and the Young Author Award of the Oceanographic Society of Japan (2007-present)
Member of Science Committee for Shiretoko World Natural Heritage (2009-Present)
Guest Editor of special section in Journal of Geophysical Research on American Geophysical Union. (2003-2004)
Convener, "Western Pacific Marginal Seas" at Ocean Sciences Meeting, by American Society of Limnology and Oceanography and American Geophysical Union, (Honolulu, Hawaii, 2002)
Principal Investigator and Vice Principal Investigator for Joint Japanese-Russian-U.S. Research Cruises of the Sea of Okhotsk (1998, 1999, 2000, 2001)
Associate Editor: Journal of Oceanography (1998-2003)

Awards:

The Okada Prize of the Oceanographic Society of Japan (1996)
The Horiuchi Prize of the Meteorological Society of Japan (2008)
The Prize of the Oceanographic Society of Japan (2015)
Commendation for Science and Technology by the Ministry of Education, Culture, Sports, Science and Technology (2016)
The Award from the Prime Minister Promoting Japan as a Maritime Nation (2018)
The Hokkaido University President's Award for Excellence in Research and Education (2019)

Selected Publications:

Ohshima, K. I., Y. Fukamachi, M. Ito, K. Nakata, D. Simizu, K. Ono, D. Nomura, G. Hashida, T. Tamura, 2022: Dominant frazil ice production in the Cape Darnley polynya leading to Antarctic Bottom Water formation. Science Advances, 8, eadc9174, doi:10.1126/sciadv.adc9174.

Nihashi, S. and K. I. Ohshima, 2015: Circumpolar mapping of Antarctic coastal polynyas and landfast sea ice: relationship and variability. Journal of Climate, 28, 3650-3670, doi:10.1175/JCLI-D-14-00369.

Ohshima, K. I., Y. Fukamachi, G. D. Williams, et al., 2013: Antarctic Bottom Water production by intense sea-ice formation in the Cape Darnley Polynya, Nature Geoscience, 6, doi:10.1038/NGEO1738, 235-240.

Kusahara, K. and K. I. Ohshima, 2009: Dynamics of the wind-driven sea level variation around Antarctica. Journal of Physical Oceanography, 39, 658-674.

Tamura, T., K. I. Ohshima, and S. Nihashi, 2008: Mapping of sea ice production for Antarctic coastal polynyas, Geophysical Research Letters, 35, L07606, doi:10.1029/2007GL032903.

Nakanowatari T., K. I. Ohshima, M. Wakatsuchi, 2007: Warming and oxygen decrease of intermediate water in the northwestern North Pacific, originating from the Sea of Okhotsk, 1955-2004. Geophysical Research Letters, 34, L04602, doi:10.1029/2006GL028243.

Ohshima, K. I. and S. Nihashi, 2005: A simplified ice-ocean coupled model for the Antarctic ice melt season. Journal of Physical Oceanography, 35, 188-201.

Ohshima, K. I., M. Wakatsuchi, Y. Fukamachi, and G. Mizuta, 2002: Near-surface circulation and tidal currents of the Okhotsk Sea observed with satellite-tracked drifters, Journal of Geophysical Research, 107, 3195, doi:10.1029/2001JC001005.

Refereed Publications

Ph-D supervised (Former PhD Students)

Recent Research Interests

Global mapping of sea ice production and heat/salt flux in ice-covered seas
Exploring of unknown Antarctic Bottom Water
Sea ice and ocean processes in coastal polynyas
Modelling of sea ice and ocean interaction
Change in the Sea of Okhotsk due to global warming

Observations by profiling floats (collaboration with University of Washington)

Observation and modelling of the East Sakhalin Current and the Soya Warm Current
Prediction of sea ice and spilled oil in the Sea of Okhotsk
Development of sea ice algorithm for satellite data
Melting of sea ice and ice/ocean albedo feedback

Ongoing projects (with funding)

Global mapping and monitoring of sea ice production
Grant-in-Aid for Scientific Research (S) (2008-2013)
Modelling of sea ice and ocean interaction (collaboration with CCSR) JST CREST: Scale interaction and large-scale variation of the ocean circulation (2006-2012)
Direct observations of unknown Antarctic Bottom Water and sea ice production/thickness by mooring system (collaboration with NIPR) Japan Antarctic Research Expedition Research Project (2010-2013)
Development and improvement of ice thickness and ice concentration algorithm in the thin sea ice regions JAXA GCOM Research Project (2008-2011)

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