2023 Fiscal Year Final Research Report
Development of ocean state estimations for the Antarctic coastal regions
| Project/Area Number |
21K13989
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| Research Category |
Grant-in-Aid for Early-Career Scientists
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| Allocation Type | Multi-year Fund |
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| Review Section |
Basic Section 17020:Atmospheric and hydrospheric sciences-related
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| Research Institution | Hokkaido University |
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Principal Investigator |
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| Project Period (FY) |
2021-04-01 – 2024-03-31
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| Keywords | 南大洋 / 南極 / 海面上昇 / 棚氷 / データ同化 |
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| Outline of Final Research Achievements |
In our study of the West Antarctic, we developed ocean state estimates with explicit ice shelf cavity representations, using adjoint sensitivities. While these estimates matched observational data for the mean state, they didn't capture interannual variability accurately. For a better agreement with observations, we conducted high-resolution simulations, exploring subglacial freshwater discharge and ocean-current-bottom topography interaction. For the East Antarctic, we are optimizing models using Green's functions and adding biogeochemical components. This aims to create a comprehensive ice shelf-ocean-carbon coupled simulation, enhancing our understanding of climate interactions.
Our work, publishing 14 articles including high-impact journals (e.g., Nature Communications and Geophysical Research Letters), advances our understanding of ice shelf melting and Antarctic ice loss.
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| Free Research Field |
極域海洋学
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| Academic Significance and Societal Importance of the Research Achievements |
南極沿岸域の中で、最も南極の氷損失が卓越するアムンゼン海、観測データ/数値モデル研究ともにほとんど実施されてこなかった東南極沿岸トッテン氷河/棚氷沖ににおける研究を行った。棚氷融解を駆動する大気/海洋プロセスについて、新しい見方を示した研究も多く、学術的に意義があるものとなった。これらの知見は、全球モデルなどのより低解像度開発やそのためのパラメタリゼーション開発に役立てられる。長期間のシミュレーションである気候モデルにおける海洋循環や海水準といった全球環境将来予測スキルの発展に資する。
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