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dc.contributor.authorJames, Rachel
dc.contributor.authorBousquet, Philippe
dc.contributor.authorBussmann, Ingeborg
dc.contributor.authorHaeckel, Matthias
dc.contributor.authorKipfer, Rolf
dc.contributor.authorLeifer, Ira
dc.contributor.authorNiemann, Helge
dc.contributor.authorOstrovsky, Ilia
dc.contributor.authorPiskozub, Jacek
dc.contributor.authorRehder, Gregor
dc.contributor.authorTreude, Tina
dc.contributor.authorVielstadte, Lisa
dc.contributor.authorGreinert, Jens
dc.date.accessioned2022-04-28T07:54:00Z
dc.date.available2022-04-28T07:54:00Z
dc.date.issued2016-05-17
dc.description.abstractLarge quantities of methane are stored in hydrates and permafrost within shallow marine sediments in the Arctic Ocean. These reservoirs are highly sensitive to climate warming, but the fate of methane released from sediments is uncertain. Here, we review the principal physical and biogeochemical processes that regulate methane fluxes across the seabed, the fate of this methane in the water column, and potential for its release to the atmosphere. We find that, at present, fluxes of dissolved methane are significantly moderated by anaerobic and aerobic oxidation of methane. If methane fluxes increase then a greater proportion of methane will be transported by advection or in the gas phase, which reduces the efficiency of the methanotrophic sink. Higher freshwater discharge to Arctic shelf seas may increase stratification and inhibit transfer of methane gas to surface waters, although there is some evidence that increased stratification may lead to warming of sub-pycnocline waters, increasing the potential for hydrate dissociation. Loss of sea-ice is likely to increase wind speeds and seaair exchange of methane will consequently increase. Studies of the distribution and cycling of methane beneath and within sea ice are limited, but it seems likely that the sea-air methane flux is higher during melting in seasonally ice-covered regions. Our review reveals that increased observations around especially the anaerobic and aerobic oxidation of methane, bubble transport, and the effects of ice cover, are required to fully understand the linkages and feedback pathways between climate warming and release of methane from marine sediments.en_US
dc.identifier.citationJames R, Bousquet P, Bussmann I, Haeckel M, Kipfer R, Leifer I, Niemann H, Ostrovsky, Piskozub, Rehder G, Treude T, Vielstadte L, Greinert J. Effects of climate change on methane emissions from seafloor sediments in the Arctic Ocean: A review. Limnology and Oceanography. 2016;61(S1):S283-S299en_US
dc.identifier.cristinIDFRIDAID 1356247
dc.identifier.doi10.1002/lno.10307
dc.identifier.issn0024-3590
dc.identifier.issn1939-5590
dc.identifier.urihttps://hdl.handle.net/10037/24922
dc.language.isoengen_US
dc.publisherWileyen_US
dc.relation.journalLimnology and Oceanography
dc.relation.projectIDinfo:eu-repo/grantAgreement/EC/FP7-ENVIRONMENT/603418/EU/ Managing Impacts of Deep-seA reSource exploitation/MIDAS/en_US
dc.rights.accessRightsopenAccessen_US
dc.rights.holderCopyright 2016 The Author(s)en_US
dc.titleEffects of climate change on methane emissions from seafloor sediments in the Arctic Ocean: A reviewen_US
dc.type.versionpublishedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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