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dc.contributor.authorSilyakova, Anna
dc.contributor.authorJansson, Pär
dc.contributor.authorSerov, Pavel
dc.contributor.authorFerré, Benedicte
dc.contributor.authorPavlov, A.K
dc.contributor.authorHattermann, Tore
dc.contributor.authorGraves, C.A
dc.contributor.authorPlatt, Stephen Matthew
dc.contributor.authorMyhre, Cathrine Lund
dc.contributor.authorGrüdger, Friederike
dc.contributor.authorNiemann, Helge
dc.date.accessioned2020-01-21T08:11:37Z
dc.date.available2020-01-21T08:11:37Z
dc.date.created2019-12-19T09:34:53Z
dc.date.issued2019
dc.identifier.citationContinental Shelf Research. 2019, 194, 104030.
dc.identifier.issn0278-4343
dc.identifier.urihttp://hdl.handle.net/11250/2637114
dc.description.abstractWe investigate methane seepage on the shallow shelf west of Svalbard during three consecutive years, using discrete sampling of the water column, echosounder-based gas flux estimates, water mass properties, and numerical dispersion modelling. The results reveal three distinct hydrographic conditions in spring and summer, showing that the methane content in the water column is controlled by a combination of free gas seepage intensity and lateral water mass movements, which disperse and displace dissolved methane horizontally away from the seeps. Horizontal dispersion and displacement of dissolved methane are promoted by eddies originating from the West Spitsbergen Current and passing over the shallow shelf, a process that is more intense in winter and spring than in the summer season. Most of the methane injected from seafloor seeps resides in the bottom layer even when the water column is well mixed, implying that the controlling effect of water column stratification on vertical methane transport is small. Only small concentrations of methane are found in surface waters, and thus the escape of methane into the atmosphere above the site of seepage is also small. The magnitude of the sea to air methane flux is controlled by wind speed, rather than by the concentration of dissolved methane in the surface ocean.nb_NO
dc.language.isoengnb_NO
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internasjonal*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/deed.no*
dc.titlePhysical controls of dynamics of methane venting from a shallow seep area west of Svalbardnb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.description.versionacceptedVersionnb_NO
dc.rights.holder© 2019 Elsevier Ltd. All rights reserved.nb_NO
dc.source.volume194nb_NO
dc.source.journalContinental Shelf Researchnb_NO
dc.identifier.doi10.1016/j.csr.2019.104030
dc.identifier.cristin1762820
dc.relation.projectNorges forskningsråd: 225814nb_NO
dc.relation.projectFramsenteret: 66060/299nb_NO
dc.relation.projectNorges forskningsråd: 223259nb_NO
dc.relation.projectNorges forskningsråd: 280727nb_NO
dc.relation.projectNILU - Norsk institutt for luftforskning: 113114nb_NO
cristin.unitcode7460,57,0,0
cristin.unitnameAtmosfære og klima
cristin.ispublishedtrue
cristin.fulltextpostprint
cristin.qualitycode1


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Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal
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