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Decadal shift of biogenic sinking particle flux in the western North Pacific subpolar region

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Title: Decadal shift of biogenic sinking particle flux in the western North Pacific subpolar region
Authors: Watanabe, Yutaka W. Browse this author →KAKEN DB
Shigemitsu, Masahito Browse this author
Ujiie, Takashi Browse this author
Minami, Hideki Browse this author →KAKEN DB
Keywords: Biogenic sinking particle
Decadal climate change
North Pacific
Issue Date: 28-Jan-2014
Publisher: American Geophysical Union 
Journal Title: Geophysical Research Letters
Volume: 41
Issue: 2
Start Page: 513
End Page: 518
Publisher DOI: 10.1002/2013GL059142
Abstract: Time series of biogenic sinking particle flux in the western North Pacific subpolar region over two decades (1989–2008) revealed that the biogenic CaCO3 (CC) flux has shown a significant decreasing trend of 2.7% year−1 (annual average, −0.88 ± 0.13 mg m2 day−1 year−1) along with the decreasing particulate organic carbon (POC) flux of 0.7% year−1, while the biogenic opal (OP) flux had no long-term trend. Comparing these results with the decreasing rate of satellite-derived surface CC with −0.7% year−1, we concluded that three fourths of the decreasing trend of CC flux was derived from the strengthening of CaCO3 dissolution through seawater column due to the weakening of water ventilation and the rest was from the decline of CaCO3-shelled species, indicating the enhancement of the efficiency in oceanic sequestration of atmospheric CO2 in the sea surface of this region due to the increase of OP/CC ratio.
Rights: ©2014. American Geophysical Union.
Type: article
URI: http://hdl.handle.net/2115/56611
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)

Submitter: 渡辺 豊

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