Shelf-Sourced Methane in Surface Seawater at the Eurasian Continental Slope (Arctic Ocean)
This study traces the pathways of dissolved methane at the Eurasian continental slope (ECS) and the Siberian shelf break based on data collected during the NABOS-II expedition in August-September, 2013. We focus on the sea ice-ocean interface during seasonal strong ice melt. Our analysis reveals a p...
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Online Access: | http://dx.doi.org/10.3389/fenvs.2022.811375 https://www.frontiersin.org/articles/10.3389/fenvs.2022.811375/full |
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crfrontiers:10.3389/fenvs.2022.811375 2024-06-23T07:50:32+00:00 Shelf-Sourced Methane in Surface Seawater at the Eurasian Continental Slope (Arctic Ocean) Vinogradova, Elena Damm, Ellen Pnyushkov, Andrey V. Krumpen, Thomas Ivanov, Vladimir V. 2022 http://dx.doi.org/10.3389/fenvs.2022.811375 https://www.frontiersin.org/articles/10.3389/fenvs.2022.811375/full unknown Frontiers Media SA https://creativecommons.org/licenses/by/4.0/ Frontiers in Environmental Science volume 10 ISSN 2296-665X journal-article 2022 crfrontiers https://doi.org/10.3389/fenvs.2022.811375 2024-06-11T04:08:13Z This study traces the pathways of dissolved methane at the Eurasian continental slope (ECS) and the Siberian shelf break based on data collected during the NABOS-II expedition in August-September, 2013. We focus on the sea ice-ocean interface during seasonal strong ice melt. Our analysis reveals a patchy pattern of methane supersaturation related to the atmospheric equilibrium. We argue that sea ice transports methane from the shelf and that ice melt is the process that causes the heterogeneous pattern of methane saturation in the Polar Mixed Layer (PML). We calculate the solubility capacity and find that seasonal warming of the PML reduces the CH 4 storage capacity and contributes to methane supersaturation and potential sea-air flux in summer. Cooling in autumn enhances the solubility capacity in the PML once again. The shifts in the solubility capacity indicate the buffering capacity for seasonal storage of atmospheric and marine methane in the PML. We discuss specific pathways for marine methane and the storage capacity of the PML on the ECS as a sink/source for atmospheric methane and methane sources from the Siberian shelf. The potential sea-air flux of methane is calculated and intrusions of methane plumes from the PML into the Cold Halocline Layer are described. Article in Journal/Newspaper Arctic Arctic Ocean Sea ice Frontiers (Publisher) Arctic Arctic Ocean Frontiers in Environmental Science 10 |
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This study traces the pathways of dissolved methane at the Eurasian continental slope (ECS) and the Siberian shelf break based on data collected during the NABOS-II expedition in August-September, 2013. We focus on the sea ice-ocean interface during seasonal strong ice melt. Our analysis reveals a patchy pattern of methane supersaturation related to the atmospheric equilibrium. We argue that sea ice transports methane from the shelf and that ice melt is the process that causes the heterogeneous pattern of methane saturation in the Polar Mixed Layer (PML). We calculate the solubility capacity and find that seasonal warming of the PML reduces the CH 4 storage capacity and contributes to methane supersaturation and potential sea-air flux in summer. Cooling in autumn enhances the solubility capacity in the PML once again. The shifts in the solubility capacity indicate the buffering capacity for seasonal storage of atmospheric and marine methane in the PML. We discuss specific pathways for marine methane and the storage capacity of the PML on the ECS as a sink/source for atmospheric methane and methane sources from the Siberian shelf. The potential sea-air flux of methane is calculated and intrusions of methane plumes from the PML into the Cold Halocline Layer are described. |
format |
Article in Journal/Newspaper |
author |
Vinogradova, Elena Damm, Ellen Pnyushkov, Andrey V. Krumpen, Thomas Ivanov, Vladimir V. |
spellingShingle |
Vinogradova, Elena Damm, Ellen Pnyushkov, Andrey V. Krumpen, Thomas Ivanov, Vladimir V. Shelf-Sourced Methane in Surface Seawater at the Eurasian Continental Slope (Arctic Ocean) |
author_facet |
Vinogradova, Elena Damm, Ellen Pnyushkov, Andrey V. Krumpen, Thomas Ivanov, Vladimir V. |
author_sort |
Vinogradova, Elena |
title |
Shelf-Sourced Methane in Surface Seawater at the Eurasian Continental Slope (Arctic Ocean) |
title_short |
Shelf-Sourced Methane in Surface Seawater at the Eurasian Continental Slope (Arctic Ocean) |
title_full |
Shelf-Sourced Methane in Surface Seawater at the Eurasian Continental Slope (Arctic Ocean) |
title_fullStr |
Shelf-Sourced Methane in Surface Seawater at the Eurasian Continental Slope (Arctic Ocean) |
title_full_unstemmed |
Shelf-Sourced Methane in Surface Seawater at the Eurasian Continental Slope (Arctic Ocean) |
title_sort |
shelf-sourced methane in surface seawater at the eurasian continental slope (arctic ocean) |
publisher |
Frontiers Media SA |
publishDate |
2022 |
url |
http://dx.doi.org/10.3389/fenvs.2022.811375 https://www.frontiersin.org/articles/10.3389/fenvs.2022.811375/full |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Ocean Sea ice |
genre_facet |
Arctic Arctic Ocean Sea ice |
op_source |
Frontiers in Environmental Science volume 10 ISSN 2296-665X |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3389/fenvs.2022.811375 |
container_title |
Frontiers in Environmental Science |
container_volume |
10 |
_version_ |
1802641445692112896 |