Multi-tracer study on Arctic Ocean Acidification
| Project/Area Number |
23681002
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| Research Category |
Grant-in-Aid for Young Scientists (A)
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| Allocation Type | Single-year Grants |
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| Research Field |
Environmental dynamic analysis
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| Research Institution | Tokyo University of Marine Science and Technology |
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Principal Investigator |
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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 |
¥23,790,000 (Direct Cost: ¥18,300,000、Indirect Cost: ¥5,490,000)
Fiscal Year 2013: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2012: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2011: ¥18,590,000 (Direct Cost: ¥14,300,000、Indirect Cost: ¥4,290,000)
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| Keywords | 海洋酸性化 / 北極海 / SF6 / トレーサー / 時系列採水 / 北極 / 国際研究者交流 / カナダ |
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| Research Abstract |
We have observed distribution of calcium carbonate saturation state in the Canada Basin. Undersaturated waters were found at the surface and subsurface layers. The distributions of surface undersaturated water were mainly determined by dilution, warming/cooling and photosynthesis. For the subsurface undersaturated water (Pacific Winter Water), we have measured SF6 concentrations in order to estimate water mass ages. Results revealed that mean age of PWW in the Canada Basin is ~10 years and newer PWW is transported in to the basen by 3 pathways. We also developed a method to reconstruct calcium carbonate saturation state from salinity, temperature and oxygen data. Reconstructed values well agreed with observed values. By applying this method to historical observations, we could make a map of calcium carbonate saturation state for the entire Arctic Ocean.
Furthermore, we have successfully collected seawater samples throughout the year, by using moored water samplers.
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Report
(4 results)
Research Products
(21 results)
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[Journal Article] Measurements of the dissolved inorganic carbon system and associated biogeochemical parameters in the Canadian Arctic, 1974-20092014
Author(s)
Giesbrecht, K. E., L. A. Miller, M. Davelaar, S. Zimmermann, E. Carmack, W. K. Johnson, R. W. Macdonald, F. McLaughlin, A. Mucci, W. J. Williams, C. S. Wong, and M. Yamamoto-Kawai
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Journal Title
Earth Syst. Sci. Data
Volume: 6
Pages: 91-104
Related Report
Peer Reviewed
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