2010 Fiscal Year Final Research Report
Bioavailability and biogeochemical processes of trace metals in the surface ocean
| Project Area | Linkages in biogeochemical cycles between surface ocean and lower atmosphere |
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| Project/Area Number |
18067006
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| Research Category |
Grant-in-Aid for Scientific Research on Priority Areas
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| Allocation Type | Single-year Grants |
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| Review Section |
Science and Engineering
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| Research Institution | The University of Tokyo |
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Principal Investigator |
TAKEDA Shigenobu The University of Tokyo, 水産学部, 教授 (20334328)
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| Co-Investigator(Kenkyū-buntansha) |
OBATA Hajime 東京大学, 大気海洋研究所, 准教授 (90334309)
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| Co-Investigator(Renkei-kenkyūsha) |
SATO Mitsuhide 東京大学, 大学院・農学生命科学研究科, 助教 (60466810)
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| Project Period (FY) |
2006 – 2010
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| Keywords | 海洋科学 / 大気海洋物質循環 / 海洋生態 / 微量元素 / 植物プランクトン |
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| Research Abstract |
In the surface waters of the western North Pacific Ocean, we investigated biogeochemical processes of trace metals, which supplied through the deposition of atmospheric aerosols such as Asian dust, and its bioavailability for phytoplankton growth. Atmospheric aerosols influenced by anthropogenic sources during the transport from the Asian continent to the North Pacific showed relatively high trace-metal solubility, and growth of phytoplankton was stimulated along with the increases in dissolved iron concentrations. Volcanic ash depositions were found to initiate phytoplankton blooms in the subarctic North Pacific during summer and it could be one of the important sources of trace metals from the atmosphere to the surface-ocean.
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