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Decadal time evolution of oceanic uptake of anthropogenic carbon in the Okhotsk Sea

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Title: Decadal time evolution of oceanic uptake of anthropogenic carbon in the Okhotsk Sea
Authors: Watanabe, Yutaka W. Browse this author →KAKEN DB
Nishioka, Jun Browse this author
Nakatsuka, Takeshi Browse this author
Keywords: efficiency of oceanic uptake of anthropogenic carbon
decadal climate change
Okhotsk Sea
Issue Date: 28-Jan-2013
Publisher: American Geophysical Union
Journal Title: Geophysical Research Letters
Volume: 40
Issue: 2
Start Page: 322
End Page: 326
Publisher DOI: 10.1002/grl.50113
Abstract: Comparing the data sets of chemical transient tracers (trichlorofluoromethane (CFC-11), dichlorodifluoromethane (CFC-12), sulfur hexafluoride (SF6)) among three reobservations from 1993 to 2006 in the Okhotsk Sea, we found the remarkable change in the efficiency of oceanic absorption of anthropogenic carbon (EF) based on the observed change of apparent tracer age. EF above 27.0 sigma(theta) increased by 16 % while EF below 27.0 sigma(theta) declined by 27 % during the period from 1993 to 2006. Consequently, EF in the entire water column decreased by 14 %. We concluded that the recent reinforcement of ocean stratification derived from the ocean warming caused the weakening of water ventilation in this region, indicating that the penetration of atmospheric anthropogenic carbon to the deep ocean interior is becoming difficult. Citation: Watanabe, Y. W., J. Nishioka, and T. Nakatsuka (2013), Decadal time evolution of oceanic uptake of anthropogenic carbon in the Okhotsk Sea, Geophys. Res. Lett., 40, 322-326, doi:10.1002/grl.50113.
Rights: Copyright 2013 American Geophysical Union.
Type: article
URI: http://hdl.handle.net/2115/53051
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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