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dc.contributor.authorStokes, Chris R.
dc.contributor.authorCorner, Geoffrey D.
dc.contributor.authorWinsborrow, Monica
dc.contributor.authorHusum, Katrine
dc.contributor.authorAndreassen, Karin
dc.date.accessioned2015-05-27T09:37:03Z
dc.date.available2015-05-27T09:37:03Z
dc.date.issued2014-03-31
dc.description.abstractRecent studies have highlighted the dynamic behavior of marine-terminating outlet glaciers over decadal time scales, linked to both atmospheric and oceanic warming. This helps explain episodes of nearly synchronous fl ow acceleration, thinning, and retreat, but nonclimatic factors such as changes in fjord width and depth, can also induce rapid recession. There is support for these topographic controls on glacier retreat, but there are few long-term records to assess their signifi cance across a population of glaciers over millennial time scales. Here we present retreat chronologies along with topographic data for eight major outlet glaciers that underwent similar climatic forcing during deglaciation of the Fennoscandian Ice Sheet (ca. 18–10 ka). Retreat rates averaged over several millennia (~30 m a<sup>–1</sup>) are less than half those recently observed on modern-day outlet glaciers (>100 m a<sup>–1</sup>), but deglaciation was punctuated by episodes of more rapid retreat (to ~150 m a<sup>–1</sup>) and readvances. It is signifi cant that phases of rapid retreat were not synchronous between glaciers and most occurred regardless of any obvious atmospheric warming. We interpret this to refl ect the complex interplay between external forcing and both topographic (e.g., bathymetry, width) and glaciological factors (e.g., ice catchments) that evolve through time, but conclude that basal overdeepenings in wide fjords induce episodes of rapid retreat (>100 m a<sup>–1</sup>), further exacerbated by their greater susceptibility to oceanic warming. This complicates attempts to predict the centennial-scale trajectory of outlet glaciers and suggests that modeling the interaction between neighboring catchments and the accurate description of subglacial topography beneath them are priorities for future work.en_US
dc.descriptionThis is the accepted manuscript version. Published version is available at <a href=http://dx.doi.org/10.1130/G35299.1>http://dx.doi.org/10.1130/G35299.1</a>en_US
dc.identifier.citationGeology 42(2014) nr. 5 s. 455-458en_US
dc.identifier.cristinIDFRIDAID 1177626
dc.identifier.doi10.1130/G35299.1
dc.identifier.issn0091-7613
dc.identifier.urihttps://hdl.handle.net/10037/7691
dc.identifier.urnURN:NBN:no-uit_munin_7280
dc.language.isoengen_US
dc.publisherGeological Society of Americaen_US
dc.rights.accessRightsopenAccess
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Marin geologi: 466en_US
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Marin geologi: 466en_US
dc.titleAsynchronous response of marine-terminating outlet glaciers during deglaciation of the Fennoscandian Ice Sheeten_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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