Reduced methane seepage from Arctic sediments during cold bottom-water conditions
Large amounts of methane are trapped within gas hydrate in subseabed sediments in the Arctic Ocean, and bottom-water warming may induce the release of methane from the seafloor. Yet the effect of seasonal temperature variations on methane seepage activity remains unknown as surveys in Arctic seas ar...
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Online Access: | https://hdl.handle.net/10037/17114 https://doi.org/10.1038/s41561-019-0515-3 |
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ftunivtroemsoe:oai:munin.uit.no:10037/17114 2023-05-15T14:23:45+02:00 Reduced methane seepage from Arctic sediments during cold bottom-water conditions Ferré, Benedicte Jansson, Pär Moser, Manuel Serov, Pavel Portnov, Aleksei D Graves, Carolyn Panieri, Giuliana Gründger, Friederike Berndt, Christian Lehmann, Moritz F. Niemann, Helge 2020-01-13 https://hdl.handle.net/10037/17114 https://doi.org/10.1038/s41561-019-0515-3 eng eng Nature Research Nature Geoscience Norges forskningsråd: 223259 info:eu-repo/grantAgreement/RCN/SFF/223259/Norway/Centre for Arctic Gas Hydrate, Environment and Climate/CAGE/ Ferré B, Jansson P, Moser M, Serov P, Portnov AD, Graves C, Panieri G, Gründger F, Berndt C, Lehmann MF, Niemann H. Reduced methane seepage from Arctic sediments during cold bottom-water conditions. Nature Geoscience. 2020 FRIDAID 1771976 doi:10.1038/s41561-019-0515-3 1752-0894 1752-0908 https://hdl.handle.net/10037/17114 openAccess © The Author(s), under exclusive licence to Springer Nature Limited 2020 VDP::Mathematics and natural science: 400::Geosciences: 450 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450 Journal article Tidsskriftartikkel Peer reviewed acceptedVersion 2020 ftunivtroemsoe https://doi.org/10.1038/s41561-019-0515-3 2021-06-25T17:57:08Z Large amounts of methane are trapped within gas hydrate in subseabed sediments in the Arctic Ocean, and bottom-water warming may induce the release of methane from the seafloor. Yet the effect of seasonal temperature variations on methane seepage activity remains unknown as surveys in Arctic seas are conducted mainly in summer. Here we compare the activity of cold seeps along the gas hydrate stability limit offshore Svalbard during cold (May 2016) and warm (August 2012) seasons. Hydro-acoustic surveys revealed a substantially decreased seepage activity during cold bottom-water conditions, corresponding to a 43% reduction of total cold seeps and methane release rates compared with warmer conditions. We demonstrate that cold seeps apparently hibernate during cold seasons, when more methane gas becomes trapped in the subseabed sediments. Such a greenhouse gas capacitor increases the potential for methane release during summer months. Seasonal bottom-water temperature variations are common on the Arctic continental shelves. We infer that methane-seep hibernation is a widespread phenomenon that is underappreciated in global methane budgets, leading to overestimates in current calculations. Article in Journal/Newspaper Arctic Arctic Arctic Ocean Svalbard University of Tromsø: Munin Open Research Archive Arctic Arctic Ocean Svalbard Nature Geoscience 13 2 144 148 |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
topic |
VDP::Mathematics and natural science: 400::Geosciences: 450 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450 |
spellingShingle |
VDP::Mathematics and natural science: 400::Geosciences: 450 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450 Ferré, Benedicte Jansson, Pär Moser, Manuel Serov, Pavel Portnov, Aleksei D Graves, Carolyn Panieri, Giuliana Gründger, Friederike Berndt, Christian Lehmann, Moritz F. Niemann, Helge Reduced methane seepage from Arctic sediments during cold bottom-water conditions |
topic_facet |
VDP::Mathematics and natural science: 400::Geosciences: 450 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450 |
description |
Large amounts of methane are trapped within gas hydrate in subseabed sediments in the Arctic Ocean, and bottom-water warming may induce the release of methane from the seafloor. Yet the effect of seasonal temperature variations on methane seepage activity remains unknown as surveys in Arctic seas are conducted mainly in summer. Here we compare the activity of cold seeps along the gas hydrate stability limit offshore Svalbard during cold (May 2016) and warm (August 2012) seasons. Hydro-acoustic surveys revealed a substantially decreased seepage activity during cold bottom-water conditions, corresponding to a 43% reduction of total cold seeps and methane release rates compared with warmer conditions. We demonstrate that cold seeps apparently hibernate during cold seasons, when more methane gas becomes trapped in the subseabed sediments. Such a greenhouse gas capacitor increases the potential for methane release during summer months. Seasonal bottom-water temperature variations are common on the Arctic continental shelves. We infer that methane-seep hibernation is a widespread phenomenon that is underappreciated in global methane budgets, leading to overestimates in current calculations. |
format |
Article in Journal/Newspaper |
author |
Ferré, Benedicte Jansson, Pär Moser, Manuel Serov, Pavel Portnov, Aleksei D Graves, Carolyn Panieri, Giuliana Gründger, Friederike Berndt, Christian Lehmann, Moritz F. Niemann, Helge |
author_facet |
Ferré, Benedicte Jansson, Pär Moser, Manuel Serov, Pavel Portnov, Aleksei D Graves, Carolyn Panieri, Giuliana Gründger, Friederike Berndt, Christian Lehmann, Moritz F. Niemann, Helge |
author_sort |
Ferré, Benedicte |
title |
Reduced methane seepage from Arctic sediments during cold bottom-water conditions |
title_short |
Reduced methane seepage from Arctic sediments during cold bottom-water conditions |
title_full |
Reduced methane seepage from Arctic sediments during cold bottom-water conditions |
title_fullStr |
Reduced methane seepage from Arctic sediments during cold bottom-water conditions |
title_full_unstemmed |
Reduced methane seepage from Arctic sediments during cold bottom-water conditions |
title_sort |
reduced methane seepage from arctic sediments during cold bottom-water conditions |
publisher |
Nature Research |
publishDate |
2020 |
url |
https://hdl.handle.net/10037/17114 https://doi.org/10.1038/s41561-019-0515-3 |
geographic |
Arctic Arctic Ocean Svalbard |
geographic_facet |
Arctic Arctic Ocean Svalbard |
genre |
Arctic Arctic Arctic Ocean Svalbard |
genre_facet |
Arctic Arctic Arctic Ocean Svalbard |
op_relation |
Nature Geoscience Norges forskningsråd: 223259 info:eu-repo/grantAgreement/RCN/SFF/223259/Norway/Centre for Arctic Gas Hydrate, Environment and Climate/CAGE/ Ferré B, Jansson P, Moser M, Serov P, Portnov AD, Graves C, Panieri G, Gründger F, Berndt C, Lehmann MF, Niemann H. Reduced methane seepage from Arctic sediments during cold bottom-water conditions. Nature Geoscience. 2020 FRIDAID 1771976 doi:10.1038/s41561-019-0515-3 1752-0894 1752-0908 https://hdl.handle.net/10037/17114 |
op_rights |
openAccess © The Author(s), under exclusive licence to Springer Nature Limited 2020 |
op_doi |
https://doi.org/10.1038/s41561-019-0515-3 |
container_title |
Nature Geoscience |
container_volume |
13 |
container_issue |
2 |
container_start_page |
144 |
op_container_end_page |
148 |
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1766296240854663168 |