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dc.contributor.authorÅkesson, Henning
dc.contributor.authorMorlighem, Mathieu
dc.contributor.authorNisancioglu, Kerim Hestnes
dc.contributor.authorSvendsen, John-Inge
dc.contributor.authorMangerud, Jan
dc.date.accessioned2018-08-20T13:42:49Z
dc.date.available2018-08-20T13:42:49Z
dc.date.issued2018-09
dc.identifier.issn0277-3791en_US
dc.identifier.urihttps://hdl.handle.net/1956/18162
dc.description.abstractMarine-terminating glaciers and ice streams are important controls of ice sheet mass balance. However, understanding of their long-term response to external forcing is limited by relatively short observational records of present-day glaciers and sparse geologic evidence for paleo-glaciers. Here we use a high-resolution ice sheet model with an accurate representation of grounding line dynamics to study the deglaciation of the marine-based south-western Norwegian sector of the Scandinavian Ice Sheet and its sensitivity to ocean and atmosphere forcing. We find that the regional response to a uniform climate change is highly dependent on the local bedrock topography, consistent with ice sheet reconstructions. Our simulations suggest that ocean warming is able to trigger initial retreat in several fjords, but is not sufficient to explain retreat everywhere. Widespread retreat requires additional ice thinning driven by surface melt. Once retreat is triggered, the underlying bedrock topography and fjord width control the rate and extent of retreat, while multi-millennial changes over the course of deglaciation are modulated by surface melt. We suggest that fjord geometry, ice-ocean interactions and grounding line dynamics are vital controls of decadal-to centennial scale ice sheet mass loss. However, we postulate that atmospheric changes are the most important drivers of widespread ice sheet demise, and will likely trump oceanic influence on future ice sheet mass loss and resulting sea level rise over centennial and longer time scales.en_US
dc.language.isoengeng
dc.publisherElsevieren_US
dc.relation.ispartof<a href="http://hdl.handle.net/1956/17504" target="blank">Deglaciation of the Norwegian fjords</a>en_US
dc.rightsAttribution CC BY-NC-NDeng
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/eng
dc.subjectIce sheet modellingeng
dc.subjectGrounding line dynamicseng
dc.subjectMarine-terminating glacierseng
dc.subjectDeglaciationeng
dc.subjectIce-ocean interactionseng
dc.subjectSurface mass balanceeng
dc.subjectYounger dryaseng
dc.subjectNorwayeng
dc.subjectEurasian ice sheeteng
dc.subjectScandinavian ice sheeteng
dc.titleAtmosphere-driven ice sheet mass loss paced by topography: Insights from modelling the south-western Scandinavian Ice Sheeten_US
dc.typePeer reviewed
dc.typeJournal article
dc.description.versionpublishedVersionen_US
dc.rights.holderCopyright 2018 The Author(s)en_US
dc.identifier.doihttps://doi.org/10.1016/j.quascirev.2018.07.004
dc.identifier.cristin1597933
dc.source.journalQuaternary Science Reviews
dc.source.40195
dc.source.pagenumber32-47


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