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Age distribution of Antarctic Bottom Water off Cape Darnley, East Antarctica, estimated using chlorofluorocarbon and sulfur hexafluoride

Ohashi, Yoshihiko; Yamamoto-Kawai, Michiyo; Kusahara, Kazuya et al.

Scientific reports, 2022, 12, 8462

Permalink : https://hdl.handle.net/2115/86247

このアイテムのアクセス数:582件（2026-10-17 21:59 集計）

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https://doi.org/10.1038/s41598-022-12109-4     24

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アクセス権
open access
URI
https://hdl.handle.net/2115/86247
タイトル
Age distribution of Antarctic Bottom Water off Cape Darnley, East Antarctica, estimated using chlorofluorocarbon and sulfur hexafluoride
著者
Ohashi, Yoshihiko ; Yamamoto-Kawai, Michiyo ; Kusahara, Kazuya ; Sasaki, Ken'ichi ; Ohshima, Kay I.
著者名
Ohashi, Yoshihiko
著者名
Yamamoto-Kawai, Michiyo
著者名
Kusahara, Kazuya
著者名
Sasaki, Ken'ichi
e-Rad_Researcher
30185251
著者名
Ohshima, Kay I.
言語
英語
発行日
2022-05-19
出版者
Nature Portfolio
収録物名
Scientific reports
巻(号)
12
ページ
8462
抄録
Chlorofluorocarbon (CFC) and sulfur hexafluoride (SF6) were used to investigate the timescale of Antarctic Bottom Water (AABW) that spreads off Cape Darnley (CD) in East Antarctica. The age of the AABW was estimated based on the observed SF6/CFC-12 ratio while taking into account tracer dilution by Lower Circumpolar Deep Water. Along the western canyons off CD and the similar to 3000 to 3500 m isobaths, the bottom water age was <5 years, reflecting the spread of newly formed CD Bottom Water. Higher ages of similar to 8 years obtained for areas east of CD and > 20 years in the northwestern offshore region indicate inflows of AABW through the Princess Elizabeth Trough and Weddell Sea Deep Water, respectively. This study determined the age distribution in the region off CD, where three different types of AABW spread.
資源タイプ
学術雑誌論文
出版タイプ
Version of Record
権利情報
Creative Commons Attribution 4.0 International
PISSN
2045-2322
関連情報 (isIdenticalTo)
出版社版DOI
https://doi.org/10.1038/s41598-022-12109-4