| Project/Area Number |
21340133
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Meteorology/Physical oceanography/Hydrology
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| Research Institution | The University of Tokyo |
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Principal Investigator |
OKA Eitarou 東京大学, 大気海洋研究所, 准教授 (60360749)
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| Co-Investigator(Kenkyū-buntansha) |
IWASAKA Naoto 東京海洋大学, 海洋工学部, 教授 (60211760)
SUGA Toshio 東北大学, 理学研究科, 准教授 (70211977)
UEHARA Kazuyuki 東海大学, 海洋学部, 准教授 (90371939)
TSUJINO Hiroyuki 気象庁気象研究所, 海洋研究部, 主任研究官 (50343893)
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| Project Period (FY) |
2009 – 2011
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| Project Status |
Completed (Fiscal Year 2011)
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| Budget Amount *help |
¥18,850,000 (Direct Cost: ¥14,500,000、Indirect Cost: ¥4,350,000)
Fiscal Year 2011: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2010: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2009: ¥13,390,000 (Direct Cost: ¥10,300,000、Indirect Cost: ¥3,090,000)
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| Keywords | 北太平洋 / モード水 / サブダクション / 中規模現象 / 季節変動 / 十年規模変動 / 水塊 |
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| Research Abstract |
We have investigated the subduction processes(in which water is subducted from the sea surface to the subsurface) and their temporal variations in the North Pacific subtropical region, focusing on mode waters, which are water masses characterized by their vertical homogeneity. By analyzing Argo float data and high-resolution numerical model outputs and conducting shipboard observations, we have clarified the structure of each mode water in its winter formation region, as well as the subduction process of each mode water in association with mesoscale variability with a horizontal scale of about 100km and its decadal variation.
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