Methane release from open leads and new ice following an Arctic winter storm event
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 fl...
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Online Access: | https://hdl.handle.net/11250/3042575 https://doi.org/10.1016/j.polar.2022.100874 |
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ftimr:oai:imr.brage.unit.no:11250/3042575 2023-05-15T14:50:51+02:00 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. 2022 application/pdf https://hdl.handle.net/11250/3042575 https://doi.org/10.1016/j.polar.2022.100874 eng eng Norges forskningsråd: 223259 Polar Science. 2022, 33 . urn:issn:1873-9652 https://hdl.handle.net/11250/3042575 https://doi.org/10.1016/j.polar.2022.100874 cristin:2043344 10 33 Polar Science Peer reviewed Journal article 2022 ftimr https://doi.org/10.1016/j.polar.2022.100874 2023-01-18T23:43:45Z 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 Methane release from open leads and new ice following an Arctic winter storm event acceptedVersion Article in Journal/Newspaper Arctic Polar Science Polar Science Sea ice Institute for Marine Research: Brage IMR Arctic Polar Science 33 100874 |
institution |
Open Polar |
collection |
Institute for Marine Research: Brage IMR |
op_collection_id |
ftimr |
language |
English |
description |
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 Methane release from open leads and new ice following an Arctic winter storm event acceptedVersion |
format |
Article in Journal/Newspaper |
author |
Silyakova, Anna Nomura, Daiki Kotovitch, Marie Fransson, Agneta Delille, Bruno Chierici, Melissa Granskog, Mats A. |
spellingShingle |
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 |
author_facet |
Silyakova, Anna Nomura, Daiki Kotovitch, Marie Fransson, Agneta Delille, Bruno Chierici, Melissa Granskog, Mats A. |
author_sort |
Silyakova, Anna |
title |
Methane release from open leads and new ice following an Arctic winter storm event |
title_short |
Methane release from open leads and new ice following an Arctic winter storm event |
title_full |
Methane release from open leads and new ice following an Arctic winter storm event |
title_fullStr |
Methane release from open leads and new ice following an Arctic winter storm event |
title_full_unstemmed |
Methane release from open leads and new ice following an Arctic winter storm event |
title_sort |
methane release from open leads and new ice following an arctic winter storm event |
publishDate |
2022 |
url |
https://hdl.handle.net/11250/3042575 https://doi.org/10.1016/j.polar.2022.100874 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Polar Science Polar Science Sea ice |
genre_facet |
Arctic Polar Science Polar Science Sea ice |
op_source |
10 33 Polar Science |
op_relation |
Norges forskningsråd: 223259 Polar Science. 2022, 33 . urn:issn:1873-9652 https://hdl.handle.net/11250/3042575 https://doi.org/10.1016/j.polar.2022.100874 cristin:2043344 |
op_doi |
https://doi.org/10.1016/j.polar.2022.100874 |
container_title |
Polar Science |
container_volume |
33 |
container_start_page |
100874 |
_version_ |
1766321920781844480 |