| Project/Area Number |
23340139
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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 | Tokyo University of Marine Science and Technology |
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Principal Investigator |
KOBASHI Fumiaki 東京海洋大学, 海洋科学技術研究科, 准教授 (80377077)
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| Co-Investigator(Kenkyū-buntansha) |
KUBOKAWA Atsushi 北海道大学, 地球環境科学研究科(研究院), 教授 (00178039)
SASAKI Hideharu 独立行政法人海洋研究開発機構, その他部局等, その他 (50359220)
HOSODA Shigeki 独立行政法人海洋研究開発機構, その他部局等, その他 (60399582)
TAGUCHI Bunmei 独立行政法人海洋研究開発機構, その他部局等, 研究員 (80435841)
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| Co-Investigator(Renkei-kenkyūsha) |
NONAKA Masami 独立行政法人海洋研究開発機構, その他部局等, 研究員 (90358771)
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| Research Collaborator |
XIE Shang-ping ハワイ大学, 気象学部, 教授
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| Project Period (FY) |
2011-04-01 – 2014-03-31
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥15,080,000 (Direct Cost: ¥11,600,000、Indirect Cost: ¥3,480,000)
Fiscal Year 2013: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2012: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2011: ¥10,140,000 (Direct Cost: ¥7,800,000、Indirect Cost: ¥2,340,000)
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| Keywords | 海洋物理学 / 大気海洋相互作用 / モード水 / 海洋循環 / 気象学 / 亜熱帯反流 |
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| Research Abstract |
A mode water is a particular water mass with vertical homogeneity of water properties such as temperature and salinity, distributed widely at subtropical and subarctic regions all over the world. From an analysis of observations and outputs of numerical models and some numerical experiments, the present study showed the active role of mode waters in the formation of surface ocean circulation and its impacts on the atmosphere. We found the influence of interannual to decadal variations of mode waters and their long-term changes associated with global warming on the North Pacific ocean circulation. In the North Pacific, the eastern subtropical countercurrent, which is generated by central mode water, is found to be possibly responsible for the formation of another mode water, eastern subtropical mode water, through air-sea interaction caused by the subtropical countercurrent.
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