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Recent deceleration of oceanic pCO2 increase in the western North Pacific in winter
| Title: | Recent deceleration of oceanic pCO2 increase in the western North Pacific in winter |
| Authors: | Midorikawa, Takashi Browse this author | | Ishii, Masao Browse this author | | Kosugi, Naohiro Browse this author | | Sasano, Daisuke Browse this author | | Nakano, Toshiya Browse this author | | Saito, Shu Browse this author | | Sakamoto, Naoaki Browse this author | | Nakano, Hideyuki Browse this author | | Inoue, Hisayuki Y. Browse this author →KAKEN DB |
| Issue Date: | 19-Jun-2012 |
| Publisher: | American Geophysical Union |
| Journal Title: | Geophysical Research Letters |
| Volume: | 39 |
| Start Page: | L12601 |
| Publisher DOI: | 10.1029/2012GL051665 |
| Abstract: | Recent changes in oceanic CO2 partial pressure (pCO2^[sea]) have attracted increasing interest as they relate to the increase in atmospheric CO2 and climate change. We report decadal changes in the growth rates of pCO2^[sea] in latitudinal zones from 3°N to 33°N along the repeat hydrographic line at 137°E in the western North Pacific in winter. The growth rates of pCO2^[sea] for 1999-2009 (-0.3 ± 0.9 [mean ± 1σ] to 1.7 ± 0.5 μatm yr^[-1]) were lower than those for 1984-1997 (0.7 ± 0.3 to 2.2 ± 0.6 μatm yr^[-1]) at most latitudes, indicative of the recent notable deceleration of pCO2^[sea] increase. For latitudes around 10-20°N, we attribute the reduction in the growth rate of pCO2^[sea] for 1999-2009 primarily to the reduction in the contribution from dissolved inorganic carbon (DIC) originating from a reduction in carbon accumulation associated with the expansion of the western Subtropical Gyre towards the south. |
| Rights: | ©2012 American Geophysical Union |
| Type: | article |
| URI: | http://hdl.handle.net/2115/50929 |
| 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: 吉川 久幸
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