Seasonal Evolution of Cape Darnley Bottom Water Revealed by Mooring Measurements

Mizuta, Genta; Fukamachi, Yasushi; Simizu, Daisuke; Matsumura, Yoshimasa; Kitade, Yujiro; Hirano, Daisuke; Fujii, Masakazu; Nogi, Yoshifumi; Ohshima, Kay I

Seasonal Evolution of Cape Darnley Bottom Water Revealed by Mooring Measurements

Mizuta, Genta; Fukamachi, Yasushi; Simizu, Daisuke et al.

Frontiers in Marine Science, 2021, 8, 657119

Permalink : https://hdl.handle.net/2115/82690

このアイテムのアクセス数:588件（2026-08-11 20:55 集計）

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https://doi.org/10.3389/fmars.2021.657119			12

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アクセス権	open access
URI	https://hdl.handle.net/2115/82690
タイトル	Seasonal Evolution of Cape Darnley Bottom Water Revealed by Mooring Measurements
著者	Mizuta, Genta ; Fukamachi, Yasushi ; Simizu, Daisuke ; Matsumura, Yoshimasa ; Kitade, Yujiro ; Hirano, Daisuke ; Fujii, Masakazu ; Nogi, Yoshifumi ; Ohshima, Kay I
e-Rad_Researcher 30301948 著者名 Mizuta, Genta
e-Rad_Researcher 20250508 著者名 Fukamachi, Yasushi
著者名 Simizu, Daisuke
e-Rad_Researcher 70631399 著者名 Matsumura, Yoshimasa
e-Rad_Researcher 50281001 著者名 Kitade, Yujiro
著者名 Hirano, Daisuke
著者名 Fujii, Masakazu
e-Rad_Researcher 90280536 著者名 Nogi, Yoshifumi
e-Rad_Researcher 30185251 著者名 Ohshima, Kay I
言語	英語
キーワード	sea ice
	seasonal evolution
	mooring measurement
	Cape Darnley Bottom Water
	Antarctic Bottom Water
発行日	2021-08-11
出版者	Frontiers Media
収録物名	Frontiers in Marine Science
巻(号)	8
ページ	657119
抄録	This study examines the seasonal evolution of Cape Darnley Bottom Water (CDBW), using the results of mooring and hydrographic measurements in the slope region off Cape Darnley in 2008-2009 and 2013-2014. Newly formed CDBW began reaching the western and nearshore part of the slope region off Cape Darnley in April, spread to the offshore and eastern part in May, and reached the easternmost part in September. The potential temperature and salinity decreased and the neutral density increased when newly formed CDBW reached mooring sites. Potential temperature-salinity properties of CDBW changed over time and location. The salinity of the source water of CDBW estimated from potential temperature-salinity diagrams started to increase at a nearshore mooring in late April, which is about 2 months after the onset of sea-ice production, and continued to increase during the ice production season. It is most probable that the accumulation of brine in the Cape Darnley polynya produces the seasonal variation of potential temperature-salinity properties of CDBW. Two types of CDBW were identified. Cold and less saline CDBW and warm and saline CDBW were present in Wild and Daly Canyons, respectively. This indicates that the salinity of the source water of CDBW increased in the westward direction. CDBW exhibited short-term variability induced by baroclinic instability.
資源タイプ	学術雑誌論文
出版タイプ	Version of Record
PISSN	2296-7745
関連情報 (isIdenticalTo)	出版社版DOI https://doi.org/10.3389/fmars.2021.657119