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Recent change in the oceanic uptake rate of anthropogenic carbon in the North Pacific subpolar region determined by using a carbon-13 time series
| Title: | Recent change in the oceanic uptake rate of anthropogenic carbon in the North Pacific subpolar region determined by using a carbon-13 time series |
| Authors: | Watanabe, Yutaka W. Browse this author | | Chiba, Takeshi Browse this author | | Tanaka, Takayuki Browse this author |
| Issue Date: | 8-Feb-2011 |
| Publisher: | American Geophysical Union |
| Journal Title: | Journal of Geophysical Research, Oceans |
| Volume: | 116 |
| Start Page: | C02006 |
| Publisher DOI: | 10.1029/2010JC006199 |
| Abstract: | Applying the δ13C approach to time series of observations in the North Pacific subpolar region (Station KNOT; 44°00'N, 155°00'E), we demonstrated time series of vertical distributions of oceanic anthropogenic carbon. We found that the vertical distributions of oceanic anthropogenic carbon during 1999-2006 were almost consistent with those estimated by the other carbon-based quasi-conservative tracer approach (ΔC*). Comparing the oceanic anthropogenic carbon contents and the water-column inventories among 1999, 2000, and 2006, we found the recent oceanic uptake rate of anthropogenic carbon above 27.3 σθ to be 0.86 ± 0.12 μmol kg^[-1] yr^[-1], which was 1.2 times higher than the expected value derived from oceanic equilibration with increasing atmospheric CO2. Considering the strengthened ocean stratification with a bidecadal oscillation and the recent increase in alkalinity from the Sea of Okhotsk, it was possible to explain the difference in the recent oceanic uptake rate of anthropogenic carbon between our result and the expected one. |
| Rights: | Copyright 2011 by the American Geophysical Union. |
| Type: | article |
| URI: | http://hdl.handle.net/2115/46903 |
| Appears in Collections: | 環境科学院・地球環境科学研究院 (Graduate School of Environmental Science / Faculty of Environmental Earth Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 渡辺 豊
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