Direct observations of sea-ice thickness and brine rejection off Sakhalin in the Sea of Okhotsk

Fukamachi, Yasushi; Shirasawa, Kunio; Polomoshnov, Anatoliy M.; Ohshima, Kay I.; Kalinin, Ervin; Nihashi, Sohey; Melling, Humfrey; Mizuta, Genta; Wakatsuchi, Masaaki

Direct observations of sea-ice thickness and brine rejection off Sakhalin in the Sea of Okhotsk

Fukamachi, Yasushi; Shirasawa, Kunio; Polomoshnov, Anatoliy M. et al.

Continental Shelf Research, 2009, 29(11-12), 1541-1548

Permalink : https://hdl.handle.net/2115/38838

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アクセス権	open access
URI	https://hdl.handle.net/2115/38838
タイトル	Direct observations of sea-ice thickness and brine rejection off Sakhalin in the Sea of Okhotsk
著者	Fukamachi, Yasushi ; Shirasawa, Kunio ; Polomoshnov, Anatoliy M. ; Ohshima, Kay I. ; Kalinin, Ervin ; Nihashi, Sohey ; Melling, Humfrey ; Mizuta, Genta ; Wakatsuchi, Masaaki
e-Rad_Researcher 20250508 著者名 Fukamachi, Yasushi
e-Rad_Researcher 50196622 著者名 Shirasawa, Kunio
著者名 Polomoshnov, Anatoliy M.
e-Rad_Researcher 30185251 著者名 Ohshima, Kay I.
著者名 Kalinin, Ervin
著者名 Nihashi, Sohey
著者名 Melling, Humfrey
著者名 Mizuta, Genta
著者名 Wakatsuchi, Masaaki
言語	英語
キーワード	Sea ice
	Ice thickness
	Polynyas
	Time series
	Ice-profiling sonar
	Brine rejection
	The Sea of Okhotsk
発行日	2009-06-15
出版者	Elsevier Ltd.
収録物名	Continental Shelf Research
巻(号)	29(11-12)
ページ	1541-1548
抄録	From December to June 2002-03, sea-ice and oceanic data were obtained from moorings near Sakhalin in the west central Okhotsk Sea. Ice draft measured by sonar reveals distinct periods of thin and thick ice. Thin-ice periods in January-March corresponded to offshore ice movement and increasing seawater salinity. The measured change in salinity corresponds well with that derived from heat-flux calculations using the observed ice thickness. Brine rejection from ice growing in a coastal polynya off northern Sakhalin is responsible for much of the observed salinity increase. The simultaneous observation of Dense shelf water (> 26.7σθ) suggests that this region is one possible source. The periods of thick-ice incursion are likely indicative of heavily deformed pack formed further north and drifting south with the current. The mean draft (1.95 m), thick-ice ratio, and keel frequency during these periods are close to values observed in the Beaufort Sea. Freshwater transport estimated from the observed ice thickness and velocity is larger than that of the Amur River discharge.
資源タイプ	学術雑誌論文
出版タイプ	Accepted Manuscript
PISSN	0278-4343
関連情報 (isVersionOf)	出版社版DOI https://doi.org/10.1016/j.csr.2009.04.005