Please use this identifier to cite or link to this item: http://dr.iiserpune.ac.in:8080/xmlui/handle/123456789/7469
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dc.contributor.authorTRIVEDI, AKASHen_US
dc.contributor.authorSARKAR, SUDIPTAen_US
dc.contributor.authorMarin-Moreno, Hectoren_US
dc.contributor.authorMinshull, Timothy A.en_US
dc.contributor.authorWhitehouse, Pippa L.en_US
dc.contributor.authorSINGH, UTPALen_US
dc.date.accessioned2022-11-21T05:35:15Z
dc.date.available2022-11-21T05:35:15Z
dc.date.issued2022-11en_US
dc.identifier.citationJCR: Solid Earth, 127(11), e2022JB025231.en_US
dc.identifier.issn2169-9313en_US
dc.identifier.issn2169-9356en_US
dc.identifier.urihttps://doi.org/10.1029/2022JB025231en_US
dc.identifier.urihttp://dr.iiserpune.ac.in:8080/xmlui/handle/123456789/7469
dc.description.abstractThe stability of methane hydrates at the feather edge of hydrate stability on the upper continental slope (UCS) is prone to ocean warming and relative sea level (RSL) change. West of Svalbard, methane seeps on the UCS were initially proposed to result from hydrate destabilization resulting from four decades of warming of Atlantic bottom water. Alternatively, it has been proposed that hydrate dissociation was triggered by RSL fall due to isostatic rebound over the past 8,000 yr rather than recent bottom water temperature (BWT) rise. Here, we address these two contrasting hypotheses by simulating the impact of 11,000 yr of BWT and RSL change on hydrates located at the UCS off west Svalbard. Our numerical simulation considers multiphase fluid and heat flow coupled with hydrate formation and dissociation. We used two reconstructions of local ice history (UiT and ICE-6G_C) that predict contrasting results for the local sea level history. Over the past 8,000 yr, the UiT model predicts a fall in RSL on the UCS, while the ICE-6G_C model, which provides a better fit to nearby coastal RSL observations, predicts a continuous rise. Our modeling shows that whilst long-term RSL fall would progressively thin the region of hydrate stability, the abrupt rise in BWT enhances hydrate dissociation. Even in the model with an RSL rise, the increase in BWT causes hydrate destabilization and pore water freshening that matches observations. We conclude that recent ocean warming plays a critical role in hydrate dissociation west of Svalbard regardless of the longer-term sea level history.en_US
dc.language.isoenen_US
dc.publisherWileyen_US
dc.subjectArctic methane hydrateen_US
dc.subjectHydrate dissociationen_US
dc.subjectMethane emissionen_US
dc.subjectOcean warmingen_US
dc.subjectSea level changeen_US
dc.subjectIsostatic rebounden_US
dc.subject2022-NOV-WEEK3en_US
dc.subjectTOC-NOV-2022en_US
dc.subject2022en_US
dc.titleReassessment of Hydrate Destabilization Mechanisms Offshore West Svalbard Confirms Link to Recent Ocean Warmingen_US
dc.typeArticleen_US
dc.contributor.departmentDept. of Earth and Climate Scienceen_US
dc.identifier.sourcetitleJCR: Solid Earthen_US
dc.publication.originofpublisherForeignen_US
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