2010 Fiscal Year Final Research Report
Influence of large-scale mountains and ocean gateways on the evolution of monsoon and ocean environment
| Project/Area Number |
20540433
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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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 | Japan, Meteorological Research Institute |
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Principal Investigator |
KITOH Akio Japan, Meteorological Research Institute, 気候研究部, 部長 (50354452)
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| Co-Investigator(Kenkyū-buntansha) |
MIDORIKAWA Takashi 気象庁気象研究所, 地球化学研究部, 部長 (10414517)
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| Co-Investigator(Renkei-kenkyūsha) |
SASAI Yoshikazu 独立行政法人海洋研究開発機構, 研究員 (40419130)
CHAN Wing-Le 独立行政法人海洋研究開発機構, 研究員 (00443341)
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| Research Collaborator |
MOTOI Tatsuo 気象庁気象大学校, 教授
MURAKAMI Shigenori 気象庁気象研究所, 気候研究部, 主任研究官 (80354455)
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| Project Period (FY) |
2008 – 2010
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| Keywords | 古気候 / 古海洋 / 山岳上昇 / 海峡開閉 / アジアモンスーン |
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| Research Abstract |
Mountain uplift experiments show that sea surface temperature, surface wind fields, precipitation and sea surface salinity are strongly influenced by mountain uplift. Enhanced Asian monsoon due to mountain uplift causes stronger seasonal coastal upwelling in the Indian Ocean and freshening in the Bay of Bengal, Yellow Sea and East China Sea. Mountain uplift experiments using a higher resolution atmospheric general circulation model reveal that the spatial pattern of precipitation becomes finer as resolution increases, and that there is a sharper contrast in the salinity distribution near the coastal regions. Experiments in which the Panamanian Gateway is closed, opened and re-closed suggest that reorganization of the ocean current due to closure of the Panamanian Gateway induces a cooler and drier climate with a permanent halocline and sea ice in the sub-arctic Pacific. Tsushima current influences cold water in the Sea of Okhotsk.
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