Methane release from open leads and new ice following an Arctic winter storm event

Silyakova, Anna; Nomura, Daiki; Kotovitch, Marie; Fransson, Agneta; Delille, Bruno; Chierici, Melissa; Granskog, Mats A.

Methane release from open leads and new ice following an Arctic winter storm event

Silyakova, Anna; Nomura, Daiki; Kotovitch, Marie et al.

Polar Science, 2022, 33, 100874

Permalink : https://hdl.handle.net/2115/93054

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論文情報

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アクセス権	open access
URI	https://hdl.handle.net/2115/93054
タイトル	Methane release from open leads and new ice following an Arctic winter storm event
著者	Silyakova, Anna ; Nomura, Daiki ; Kotovitch, Marie ; Fransson, Agneta ; Delille, Bruno ; Chierici, Melissa ; Granskog, Mats A.
著者名 Silyakova, Anna
e-Rad_Researcher 70550739 著者名 Nomura, Daiki
著者名 Kotovitch, Marie
著者名 Fransson, Agneta
著者名 Delille, Bruno
著者名 Chierici, Melissa
著者名 Granskog, Mats A.
言語	英語
キーワード	Methane
	Arctic ocean
	Sea ice
	Wintertime
	Storm
発行日	2022-09-09
出版者	Elsevier
収録物名	Polar Science
巻(号)	33
ページ	100874
抄録	We examine an Arctic winter storm event, which led to ice break-up, the formation of open leads, and the subsequent freezing of these leads. The methane (CH4) concentration in under-ice surface water before and during the storm event was 8-12 nmol L-1, which resulted in a potential sea-to-air CH4 flux ranging from +0.2 to +2.1 mg CH4 m- 2 d-1 in open leads. CH4 ventilation between seawater and atmosphere occurred when both open water fraction and wind speed increased. Over the nine days after the storm, sea ice grew 27 cm thick. Initially, CH4 concentrations in the sea ice brine were above the equilibrium with the atmosphere. As the ice grew thicker, most of the CH4 was lost from upper layers of sea ice into the atmosphere, implying continued CH4 evasion after the leads were ice-covered. This suggests that wintertime CH4 emissions need to be better constrained.
資源タイプ	学術雑誌論文
出版タイプ	Accepted Manuscript
権利情報	Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
権利情報	© <2022>, Elsevier. This manuscript version is made available under the CC-BY-NC-ND 4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/
PISSN	1873-9652
関連情報 (isVersionOf)	出版社版DOI https://doi.org/10.1016/j.polar.2022.100874