2012 Fiscal Year Final Research Report
On the mechanism of the long-term trend of the oceanic CO2 in the equatorial Pacific Ocean
| Project/Area Number |
22310017
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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 |
Environmental dynamic analysis
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| Research Institution | Japan, Meteorological Research Institute |
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Principal Investigator |
ISHII Masao 気象庁気象研究所, 気象庁気象研究所, 室長 (70354553)
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| Co-Investigator(Kenkyū-buntansha) |
SASANO Daisuke 気象研究所, 地球化学研究部, 地球化学研究部 (10462524)
KOSUGI Naohiro 気象研究所, 地球化学研究部, 研究官 (20553168)
SUZUKI Toru (財)日本水路協会海洋情報研究センター, 研究開発部, 部長 (10360736)
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| Co-Investigator(Renkei-kenkyūsha) |
MIDORIKAWA Takashi 気象研究所, 地球化学研究部, 地球化学研究部 (10414517)
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| Project Period (FY) |
2010 – 2012
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| Keywords | 化学海洋 |
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| Research Abstract |
While improving the methods for the measurement of ocean CO_2 system parameters, we made measurements of these parameters in the surface and in the interior of the equatorial Pacific. We also prepared the database “PACIFICA” for the ocean CO_2 system and biochemical parameters in the Pacific Ocean through the international cooperation under the North Pacific Marine Science Organization (PICES). Using the PACIFICA database, we have demonstrated that CO_2 content in seawater is increasing and ocean acidification is occurring significantly in the tropical zone of the Pacific Ocean due to anthropogenic CO_2 emissions. The transport of anthropogenic CO_2 from the subtropical zones in the North and South Pacific through the shallow meridional overturning circulation is considered to be a key process controlling the CO_2 increase and ocean acidification in the western Pacific tropical regions
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