Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Environmental Science / Faculty of Environmental Earth Science >
Peer-reviewed Journal Articles, etc >
Decadal time evolution of oceanic uptake of anthropogenic carbon in the Okhotsk Sea
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
|