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dc.contributor.authorAllaart, Lis
dc.contributor.authorSchomacker, Anders
dc.contributor.authorLarsen, Nicolaj K.
dc.contributor.authorNørmark, Egon
dc.contributor.authorRydningen, Tom Arne
dc.contributor.authorFarnsworth, Wesley R.
dc.contributor.authorRetelle, Michael J.
dc.contributor.authorBrynjólfsson, Skafti
dc.contributor.authorForwick, Matthias
dc.contributor.authorKjellman, Sofia Elisabeth
dc.date.accessioned2020-12-08T13:05:57Z
dc.date.available2020-12-08T13:05:57Z
dc.date.issued2020-11-30
dc.description.abstractThe response of glaciers and ice caps to past climate change provides important insight into how they will react to ongoing and future global warming. In Svalbard, the Holocene glacial history has been studied for many cirque and valley glaciers. However, little is known about how the larger ice caps in Svalbard responded to Late Glacial and Holocene climate changes. Here we use lake sediment cores and geophysical data from Femmilsjøen, one of Svalbard’s largest lakes, to reconstruct the glacial history of the Åsgardfonna Ice Cap since the last deglaciation. We find that Femmilsjøen potentially deglaciated prior to 16.1 ± 0.3 cal ka BP and became isolated from the marine environment between 11.7 ± 0.3 to 11.3 ± 0.2 cal ka BP. Glacial meltwater runoff was absent between 10.1 ± 0.4 and 3.2 ± 0.2 cal ka BP, indicating that Åsgardfonna was greatly reduced or disappeared in the Early and Middle Holocene. Deposition of glacial-meltwater sediments re-commenced in Femmilsjøen at c. 3.2 ± 0.2 cal ka BP, indicating glacier re-growth in the Femmilsjøen catchment and the onset of the Neoglacial. The glacier(s) in the Femmilsjøen catchment area reached sizes no smaller than their modern extents already at c. 2.1 ± 0.7 cal ka BP. Our results suggest that larger Svalbard ice caps such as Åsgardfonna are very sensitive to climate changes and probably melted completely during the Holocene Thermal Maximum. Such information can be used as important constraints in future ice-cap simulations.en_US
dc.identifier.citationAllaart L, Schomacker A, Larsen NK, Nørmark, Rydningen TA, Farnsworth WR, Retelle MJ, Brynjólfsson S, Forwick M, Kjellman SE. Glacial history of the Åsgardfonna Ice Cap, NE Spitsbergen, since the last glaciation. Quaternary Science Reviews. 2020;251(106717)en_US
dc.identifier.cristinIDFRIDAID 1856817
dc.identifier.doi10.1016/j.quascirev.2020.106717
dc.identifier.issn0277-3791
dc.identifier.issn1873-457X
dc.identifier.urihttps://hdl.handle.net/10037/20024
dc.language.isoengen_US
dc.publisherElsevieren_US
dc.relation.ispartofAllaart, L. (2021). Late Pleistocene-Holocene history of Svalbard ice caps and glaciers – integrating marine, terrestrial and lacustrine archives. (Doctoral thesis). <a href=https://hdl.handle.net/10037/20634>https://hdl.handle.net/10037/20634</a>.
dc.relation.journalQuaternary Science Reviews
dc.relation.projectIDSvalbards miljøvernfond: 17/01132-3en_US
dc.relation.projectIDNorges forskningsråd: 282643en_US
dc.relation.projectIDSvalbards miljøvernfond: 16/35en_US
dc.rights.accessRightsopenAccessen_US
dc.rights.holderCopyright 2020 The Author(s)en_US
dc.subjectVDP::Mathematics and natural science: 400::Geosciences: 450en_US
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Geofag: 450en_US
dc.titleGlacial history of the Åsgardfonna Ice Cap, NE Spitsbergen, since the last glaciationen_US
dc.type.versionpublishedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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