2022 Fiscal Year Final Research Report

Variations and interactions of climate and the Antarctic Ice Sheet

Planned Research

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Project Area	Giant reservoirs of heat/water/material : Global environmental changes driven by the Southern Ocean and the Antarctic Ice Sheet
Project/Area Number	17H06320
Research Category	Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
Allocation Type	Single-year Grants
Review Section	Complex systems
Research Institution	National Institute of Polar Research
Principal Investigator	Kawamura Kenji 国立極地研究所, 先端研究推進系, 准教授 (90431478)
Co-Investigator(Kenkyū-buntansha)	植村立名古屋大学, 環境学研究科, 准教授 (00580143) 本山秀明国立極地研究所, 研究教育系, 教授 (20210099) 杉山慎北海道大学, 低温科学研究所, 教授 (20421951) 澤柿教伸法政大学, 社会学部, 教授 (70312410)
Project Period (FY)	2017-06-30 – 2022-03-31
Keywords	南極氷床 / アイスコア・氷床コア / 氷河・氷床 / 氷床－海洋相互作用 / 気候変動
Outline of Final Research Achievements	Field observations, satellite data analysis, and ice core analyses have been conducted, primarily focusing on East Antarctica. Through these efforts, the dynamics of the Antarctic ice sheet and its relationship with global climate have been elucidated, spanning from the present to glacial-interglacial scales. Successful data acquisitions have been made through hot-water drilling in ice shelves, and the observations of surface mass balance, bedrock topography and surface topography. The achievements also include age constraints and paleoenvironmental reconstructions using the Dome Fuji ice core. Advances have been made in understanding of dynamics at the marine-terminating ice sheet and the relationship between ice sheet mass and climate change. Furthermore, collaboration with other research groups has contributed to the understanding of the status and changes of the Antarctic ice sheet as well as validating numerical models.
Free Research Field	古気候学
Academic Significance and Societal Importance of the Research Achievements	棚氷の熱水掘削による観測や、広域の表面質量収支、基盤・表面地形等の観測が成功し、過去の復元では、ドームふじアイスコアによる年代制約と古環境復元や、地形地質調査・試料解析による過去数万年間の氷床変動の規模とタイミングの制約など、学術的意義の大きい成果を得た。氷床質量と気候変動の関連の理解が進んだ上、他班との連携による南極氷床の実態と変動の解明や気候モデル検証への寄与なども進捗した。棚氷融解過程や過去の気候変動の理解は、今後の予測精度を高め、南極環境に対する気候影響の緩和や対応などの検討や、人々の意識の変化につながり得るものである。