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Temporal constraints on hydrate-controlled methane seepage off Svalbard

Permanent lenke
https://hdl.handle.net/10037/13243
DOI
https://doi.org/10.1126/science.1246298
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article.pdf (1.818Mb)
Accepted manuscript version (PDF)
Dato
2014-01-17
Type
Journal article
Tidsskriftartikkel
Peer reviewed

Forfatter
Berndt, Christian; Feseker, Tomas; Treude, Tina; Krastel, Sebastien; Liebetrau, Volker; Niemann, Helge; Bertics, Victoria; Dumke, Ines; Dünnbier, Karolin; Ferré, Benedicte; Graves, Carolyn; Gross, Felix; Hissmann, Karen; Hühnerbach, Veit; Krause, Stefan; Lieser, Kathrin; Schauer, Jürgen; Steinle, Lea
Sammendrag
Methane hydrate is an icelike substance that is stable at high pressure and low temperature in continental margin sediments. Since the discovery of a large number of gas flares at the landward termination of the gas hydrate stability zone off Svalbard, there has been concern that warming bottom waters have started to dissociate large amounts of gas hydrate and that the resulting methane release may possibly accelerate global warming. Here, we corroborate that hydrates play a role in the observed seepage of gas, but we present evidence that seepage off Svalbard has been ongoing for at least 3000 years and that seasonal fluctuations of 1° to 2°C in the bottom-water temperature cause periodic gas hydrate formation and dissociation, which focus seepage at the observed sites.
Beskrivelse
This is the author’s version of the work. It is posted here by permission of the AAAS for personal use, not for redistribution. The definitive version was published in Science on vol. 343, issue 6168, 17 Jan 2014, https://doi.org/10.1126/science.1246298.
Forlag
American Association for the Advancement of Science
Sitering
Berndt, C., Feseker, T., Treude, T., Krastel, S., Liebetrau, V., Niemann, H., ... Steinle, L. (2014). Temporal constraints on hydrate-controlled methane seepage off Svalbard. Science. 343(6168), 284-287. https://doi.org/10.1126/science.1246298
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