Dominant frazil ice production in the Cape Darnley polynya leading to Antarctic Bottom Water formation

Ohshima, Kay I.; Fukamachi, Yasushi; Ito, Masato; Nakata, Kazuki; Simizu, Daisuke; Ono, Kazuya; Nomura, Daiki; Hashida, Gen; Tamura, Takeshi

Dominant frazil ice production in the Cape Darnley polynya leading to Antarctic Bottom Water formation

Ohshima, Kay I.; Fukamachi, Yasushi; Ito, Masato et al.

Science advances, 2022, 8(42), eadc9174

Permalink : https://hdl.handle.net/2115/87550

このアイテムのアクセス数:378件（2026-08-17 04:56 集計）

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https://doi.org/10.1126/sciadv.adc9174			29

論文情報

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アクセス権	open access
URI	https://hdl.handle.net/2115/87550
タイトル	Dominant frazil ice production in the Cape Darnley polynya leading to Antarctic Bottom Water formation
著者	Ohshima, Kay I. ; Fukamachi, Yasushi ; Ito, Masato ; Nakata, Kazuki ; Simizu, Daisuke ; Ono, Kazuya ; Nomura, Daiki ; Hashida, Gen ; Tamura, Takeshi
e-Rad_Researcher 30185251 著者名 Ohshima, Kay I.
著者名 Fukamachi, Yasushi
著者名 Ito, Masato
著者名 Nakata, Kazuki
著者名 Simizu, Daisuke
e-Rad_Researcher 40396320 著者名 Ono, Kazuya
著者名 Nomura, Daiki
著者名 Hashida, Gen
著者名 Tamura, Takeshi
言語	英語
発行日	2022-10-19
出版者	The American Association for the Advancement of Science（AAAS）
収録物名	Science advances
巻(号)	8(42)
ページ	eadc9174
抄録	Antarctic Bottom Water (AABW) occupies the abyssal layer of the world ocean and contributes to the global over-turning circulation. It originates from dense shelf water, which forms from brine rejection during sea ice production. An important region of AABW formation has been identified off the Cape Darnley polynya. However, it remains unclear why and how high ice production leads to AABW formation. Using moored acoustic measurements and a satellite microwave algorithm, we reveal that underwater frazil ice dominates in the polynya. This underwater ice formation prevents heat-insulating surface-cover ice forming, thereby enabling efficient ice production. The high ice production in the nearshore and longer residence times create high-salinity source water for the AABW. Underwater frazil ice occurs as long as strong winds continue and occasionally penetrates depths of at least 80 m. Deep-penetrating frazil ice is particularly prominent in this polynya, while it also occurs in other Antarctic coastal polynyas.
資源タイプ	学術雑誌論文
出版タイプ	Version of Record
PISSN	2375-2548
関連情報 (isIdenticalTo)	出版社版DOI https://doi.org/10.1126/sciadv.adc9174