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Flux of low salinity water from Aniva Bay (Sakhalin Island) to the southern Okhotsk Sea

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Title: Flux of low salinity water from Aniva Bay (Sakhalin Island) to the southern Okhotsk Sea
Authors: Oguma, Sachiko Browse this author
Ono, Tsuneo Browse this author
Watanabe, Yutaka W. Browse this author
Kasai, Hiromi Browse this author
Watanabe, Shuichi Browse this author
Nomura, Daiki Browse this author
Mitsudera, Humio Browse this author →KAKEN DB
Keywords: Aniva Bay
southern Okhotsk Sea
normalized total alkalinity
stable isotopes
chemical tracers
Issue Date: 1-Jan-2011
Publisher: Elsevier
Journal Title: Estuarine, Coastal and Shelf Science
Volume: 91
Issue: 1
Start Page: 24
End Page: 32
Publisher DOI: 10.1016/j.ecss.2010.10.002
Abstract: In this study, we examined the relationship between the low salinity water in the shelf region of the southern Okhotsk Sea which was seasonally sampled (0-200 m), and fluxes of low salinity water from Aniva Bay. To express the source of freshwater mixing in the surface layer, we applied normalized total alkalinity (NTA) and stable isotopes of seawater as chemical tracers. NTA-S diagrams indicate that NTA of low salinity water in the upper 30 m layer just off the Soya Warm Current is clearly higher than in the far offshore region in summer and autumn. Using NTA-S regression lines, we could deduce that the low salinity and high NTA water in the upper layer originates from Aniva Bay. For convenience, we defined this water as the Aniva Surface Water (ASW) with values S < 32, NTA > 2450 μmol kg^[-1]. Formation and transport processes of ASW are discussed using historical data. The interaction between the maximum core of high NTA water on the bottom slope of eastern Aniva Bay and an anticyclonic eddy at the mouth of Aniva Bay are concluded to control ASW formation. Upwelling of the Cold Water Belt water at the tip of Cape Krillion is considered to cause ASW outflow from Aniva Bay.
Type: article (author version)
URI: http://hdl.handle.net/2115/44976
Appears in Collections:低温科学研究所 (Institute of Low Temperature Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 三寺 史夫

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