2023 Fiscal Year Final Research Report

Sea-ice reduction in the Pacific Arctic during summer from the variability of sea-ice thickness during winter

Research Project

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Project/Area Number	19H01961
Research Category	Grant-in-Aid for Scientific Research (B)
Allocation Type	Single-year Grants
Section	一般
Review Section	Basic Section 17020:Atmospheric and hydrospheric sciences-related
Research Institution	Hokkaido University
Principal Investigator	FUKAMACHI Yasushi 北海道大学, 北極域研究センター, 教授 (20250508)
Co-Investigator(Kenkyū-buntansha)	大島慶一郎北海道大学, 低温科学研究所, 教授 (30185251) 二橋創平苫小牧工業高等専門学校, 創造工学科, 教授 (50396321) 伊東素代国立研究開発法人海洋研究開発機構, 地球環境部門(北極環境変動総合研究センター), 副主任研究員 (60373453)
Project Period (FY)	2019-04-01 – 2023-03-31
Keywords	海氷 / 北極海 / 海氷厚 / 係留観測 / 衛星観測
Outline of Final Research Achievements	In the Pacific Arctic Ocean, where sea ice loss is most pronounced, sea ice thickness, sea ice drift, ocean current, water temperature, and salinity data were obtained from the mooring observations off Barrow for 12 consecutive years from 2009 to 2021. This long-term continuous data, combined with satellite sea ice data, can be used to elucidate the causes of rapid sea ice reduction in this area. These data can also show interannual variabilities of the coastal polynya off Barrow and year-to year variations in occurrence of frazil ice and zooplankton.
Free Research Field	海洋物理学
Academic Significance and Societal Importance of the Research Achievements	地球温暖化の影響が最も進んでいる海域において今までにない海氷・海洋データが取得できたことで、温暖化の影響評価と将来予測に資するデータを得ることができた。加えて、急速な気候変動期にアラスカ沿岸地域社会が求める科学的な基礎情報としても資するものである。