| Project/Area Number |
20310002
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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 | Hokkaido University |
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Principal Investigator |
YOSHIKAWA Hisayuki Hokkaido University, 大学院・地球環境科学研究院, 教授 (60344496)
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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)
HASHIDA Gen 国立極地研究所, 気水圏研究グループ, 助教 (00280537)
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| Co-Investigator(Renkei-kenkyūsha) |
ISHII Masao 気象庁気象研究所, 地球化学研究部, 室長 (70354553)
SASANO Daisuke 気象庁気象研究所, 地球化学研究部, 研究官 (10462524)
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| Project Period (FY) |
2008 – 2010
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| Project Status |
Completed (Fiscal Year 2010)
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| Budget Amount *help |
¥18,590,000 (Direct Cost: ¥14,300,000、Indirect Cost: ¥4,290,000)
Fiscal Year 2010: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2009: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2008: ¥8,970,000 (Direct Cost: ¥6,900,000、Indirect Cost: ¥2,070,000)
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| Keywords | 物質循環 / 南極海 / 二酸化炭素分圧 / 炭酸系 / 海洋生物生産 / 白鳳丸 / 海鷹丸 / 溶存無機炭 / アルカリ度 / 溶存無機炭素 / 鉛直混合 / 人為起源二酸化炭素 / 海底地形 / 生物生産 / 南極底層水 / 季節海氷域 |
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| Research Abstract |
We have conducted observational studies with the main objective of clarifying air-sea CO_2 flux and factors controlling it in the Southern Ocean. Measurements of partial pressure of CO_2, dissolved inorganic carbon, pH, and dissolved oxygen were made in the Southern Ocean over the period from December to January in FY2009 and FY2010. Observed results indicate that biological activity plays an important role in determining temporal/spatial distribution of air-sea CO_2 flux. By combining historical data, we determined the long-term increase of partial pressure of CO_2 in surface seawater and decrease of pH, mainly due to the oceanic CO_2 uptake.
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