| Co-Investigator(Kenkyū-buntansha) |
中野 善之 国立研究開発法人海洋研究開発機構, 研究プラットフォーム運用開発部門, 副主任研究員 (20566103)
水田 元太 北海道大学, 地球環境科学研究院, 助教 (30301948)
北出 裕二郎 東京海洋大学, 学術研究院, 教授 (50281001)
川合 美千代 東京海洋大学, 学術研究院, 准教授 (50601382)
勝又 勝郎 国立研究開発法人海洋研究開発機構, 地球環境部門(海洋観測研究センター), グループリーダー (80450774)
田村 岳史 国立極地研究所, 先端研究推進系, 准教授 (40451413)
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| Budget Amount *help |
¥156,780,000 (Direct Cost: ¥120,600,000、Indirect Cost: ¥36,180,000)
Fiscal Year 2021: ¥20,280,000 (Direct Cost: ¥15,600,000、Indirect Cost: ¥4,680,000)
Fiscal Year 2020: ¥20,800,000 (Direct Cost: ¥16,000,000、Indirect Cost: ¥4,800,000)
Fiscal Year 2019: ¥39,650,000 (Direct Cost: ¥30,500,000、Indirect Cost: ¥9,150,000)
Fiscal Year 2018: ¥16,380,000 (Direct Cost: ¥12,600,000、Indirect Cost: ¥3,780,000)
Fiscal Year 2017: ¥59,670,000 (Direct Cost: ¥45,900,000、Indirect Cost: ¥13,770,000)
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| Outline of Final Research Achievements |
We have clarified the decadal variabilities of the Antarctic Bottom Water (AABW) in East Antarctica, by collaboration of five Japanese research vessels in the Southern Ocean for the first time. We have revealed that the freshening trend of the AABW has reversed broadly in the late 2010s after the continuous freshening of the AABW for the previous 30 years. We assume that this is caused by the variability of the glacier melt in the Ross Sea. We have elucidated the circulation time scale and material cycle associated with the Cape Darnley Bottom Water. We have conducted intensive observation on glacier-ocean interaction off Shirase Glacier and Totten Glacier, revealing the processes of the basal melting by warmer water intruding from offshore.
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