Widespread methane seepage along the continental margin off Svalbard - from Bjørnøya to Kongsfjorden
Numerous articles have recently reported on gas seepage offshore Svalbard, because of gas emission that may be due to gas hydrate dissociation, possibly triggered by anthropogenic ocean warming. Here we report on findings for a much broader extent of seepage in water depths at and shallower than the...
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ftawi:oai:epic.awi.de:41558 2024-09-15T17:59:56+00:00 Widespread methane seepage along the continental margin off Svalbard - from Bjørnøya to Kongsfjorden Mau, Susan Römer, Miriam Torres, Marta E. Bussmann, Ingeborg Pape, Thomas Damm, Ellen Geprägs, Patrizia Wintersteller, Paul Hsu, C.-W. Loher, M. Bohrmann, Gerhard 2017-02-23 https://epic.awi.de/id/eprint/41558/ https://www.nature.com/articles/srep42997.pdf https://hdl.handle.net/10013/epic.50953 unknown Nature Mau, S. , Römer, M. , Torres, M. E. , Bussmann, I. orcid:0000-0002-1197-7461 , Pape, T. , Damm, E. orcid:0000-0002-1487-1283 , Geprägs, P. , Wintersteller, P. , Hsu, C. W. , Loher, M. and Bohrmann, G. (2017) Widespread methane seepage along the continental margin off Svalbard - from Bjørnøya to Kongsfjorden , Scientific Reports, 7 (42997), pp. 1-13 . doi:10.1038/srep4299 <https://doi.org/10.1038/srep4299> , hdl:10013/epic.50953 EPIC3Scientific Reports, Nature, 7(42997), pp. 1-13, ISSN: 2045-2322 Article isiRev 2017 ftawi https://doi.org/10.1038/srep4299 2024-06-24T04:15:36Z Numerous articles have recently reported on gas seepage offshore Svalbard, because of gas emission that may be due to gas hydrate dissociation, possibly triggered by anthropogenic ocean warming. Here we report on findings for a much broader extent of seepage in water depths at and shallower than the gas hydrate stability zone. More than a thousand gas seepage sites imaged as acoustic flares generate a hundreds of kilometer-long plume. Most flares were detected in the vicinity of the Hornsund Fracture Zone. We postulate that the gas ascends from depth along the fracture zone; its discharge is focused on bathymetric highs and is constrained by glaciomarine and Holocene sediments in the troughs. A fraction of this dissolved methane (~1.8%) was oxidized whereas a minor but measureable fraction (0.05%) was transferred into the atmosphere in August 2015. The large scale seepage reported here is not linked to anthropogenic warming. Article in Journal/Newspaper Bjørnøya Hornsund Kongsfjord* Kongsfjorden Svalbard Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
Numerous articles have recently reported on gas seepage offshore Svalbard, because of gas emission that may be due to gas hydrate dissociation, possibly triggered by anthropogenic ocean warming. Here we report on findings for a much broader extent of seepage in water depths at and shallower than the gas hydrate stability zone. More than a thousand gas seepage sites imaged as acoustic flares generate a hundreds of kilometer-long plume. Most flares were detected in the vicinity of the Hornsund Fracture Zone. We postulate that the gas ascends from depth along the fracture zone; its discharge is focused on bathymetric highs and is constrained by glaciomarine and Holocene sediments in the troughs. A fraction of this dissolved methane (~1.8%) was oxidized whereas a minor but measureable fraction (0.05%) was transferred into the atmosphere in August 2015. The large scale seepage reported here is not linked to anthropogenic warming. |
format |
Article in Journal/Newspaper |
author |
Mau, Susan Römer, Miriam Torres, Marta E. Bussmann, Ingeborg Pape, Thomas Damm, Ellen Geprägs, Patrizia Wintersteller, Paul Hsu, C.-W. Loher, M. Bohrmann, Gerhard |
spellingShingle |
Mau, Susan Römer, Miriam Torres, Marta E. Bussmann, Ingeborg Pape, Thomas Damm, Ellen Geprägs, Patrizia Wintersteller, Paul Hsu, C.-W. Loher, M. Bohrmann, Gerhard Widespread methane seepage along the continental margin off Svalbard - from Bjørnøya to Kongsfjorden |
author_facet |
Mau, Susan Römer, Miriam Torres, Marta E. Bussmann, Ingeborg Pape, Thomas Damm, Ellen Geprägs, Patrizia Wintersteller, Paul Hsu, C.-W. Loher, M. Bohrmann, Gerhard |
author_sort |
Mau, Susan |
title |
Widespread methane seepage along the continental margin off Svalbard - from Bjørnøya to Kongsfjorden |
title_short |
Widespread methane seepage along the continental margin off Svalbard - from Bjørnøya to Kongsfjorden |
title_full |
Widespread methane seepage along the continental margin off Svalbard - from Bjørnøya to Kongsfjorden |
title_fullStr |
Widespread methane seepage along the continental margin off Svalbard - from Bjørnøya to Kongsfjorden |
title_full_unstemmed |
Widespread methane seepage along the continental margin off Svalbard - from Bjørnøya to Kongsfjorden |
title_sort |
widespread methane seepage along the continental margin off svalbard - from bjørnøya to kongsfjorden |
publisher |
Nature |
publishDate |
2017 |
url |
https://epic.awi.de/id/eprint/41558/ https://www.nature.com/articles/srep42997.pdf https://hdl.handle.net/10013/epic.50953 |
genre |
Bjørnøya Hornsund Kongsfjord* Kongsfjorden Svalbard |
genre_facet |
Bjørnøya Hornsund Kongsfjord* Kongsfjorden Svalbard |
op_source |
EPIC3Scientific Reports, Nature, 7(42997), pp. 1-13, ISSN: 2045-2322 |
op_relation |
Mau, S. , Römer, M. , Torres, M. E. , Bussmann, I. orcid:0000-0002-1197-7461 , Pape, T. , Damm, E. orcid:0000-0002-1487-1283 , Geprägs, P. , Wintersteller, P. , Hsu, C. W. , Loher, M. and Bohrmann, G. (2017) Widespread methane seepage along the continental margin off Svalbard - from Bjørnøya to Kongsfjorden , Scientific Reports, 7 (42997), pp. 1-13 . doi:10.1038/srep4299 <https://doi.org/10.1038/srep4299> , hdl:10013/epic.50953 |
op_doi |
https://doi.org/10.1038/srep4299 |
_version_ |
1810437051888173056 |