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dc.contributor.authorGudlaugsson, Eythor
dc.contributor.authorHumbert, Angelika
dc.contributor.authorAndreassen, Karin
dc.contributor.authorClason, Caroline C.
dc.contributor.authorKleiner, Thomas
dc.contributor.authorBeyer, Sebastian
dc.date.accessioned2018-03-16T10:31:36Z
dc.date.available2018-03-16T10:31:36Z
dc.date.issued2017-04-24
dc.description.abstractIce-stream dynamics are strongly controlled by processes taking place at the ice/bed interface where subglacial water both lubricates the base and saturates any existing, underlying sediment. Large parts of the former Eurasian ice sheet were underlain by thick sequences of soft, marine sediments and many areas are imprinted with geomorphological features indicative of fast flow and wet basal conditions. Here, we study the effect of subglacial water on past Eurasian ice-sheet dynamics by incorporating a thin-film model of basal water flow into the ice-sheet model SICOPOLIS and use it to better represent flow in temperate areas. The adjunction of subglacial hydrology results in a smaller ice-sheet building up over time and generally faster ice velocities, which consequently reduces the total area fraction of temperate basal ice and ice streaming areas. Minima in the hydraulic pressure potential, governing water flow, are used as indicators for potential locations of past subglacial lakes and a probability distribution of lake existence is presented based on estimated lake depth and longevity.en_US
dc.description.sponsorshipUiT - Arctic University of Norway Statoil Det Norske ASA BG group Norwayen_US
dc.identifier.citationGudlaugsson, E., Humbert, A., Andreassen, K., Clason, C.C., Kleiner, T. & Beyer, S. (2017). Eurasian ice-sheet dynamics and sensitivity to subglacial hydrology. Journal of Glaciology, 63(239), 556-564.en_US
dc.identifier.cristinIDFRIDAID 1474377
dc.identifier.doi10.1017/jog.2017.21
dc.identifier.issn0022-1430
dc.identifier.issn1727-5652
dc.identifier.urihttps://hdl.handle.net/10037/12362
dc.language.isoengen_US
dc.publisherCambridge University Pressen_US
dc.relation.ispartofGudlaugsson, E. (2015). Modelling the subglacial hydrology of the former Barents Sea Ice Sheet. (Doctoral thesis). <a href=https://hdl.handle.net/10037/25064>https://hdl.handle.net/10037/25064</a>
dc.relation.journalJournal of Glaciology
dc.relation.projectIDNorges forskningsråd: 223259en_US
dc.relation.projectIDinfo:eu-repo/grantAgreement/RCN/PETROMAKS2/200672/Norway/Glaciations in the Barents Sea area//en_US
dc.relation.projectIDinfo:eu-repo/grantAgreement/RCN/SFF/223259/Norway/Centre for Arctic Gas Hydrate, Environment and Climate/CAGE/en_US
dc.rights.accessRightsopenAccessen_US
dc.subjectglacier hydrologyen_US
dc.subjectice dynamicsen_US
dc.subjectice-sheet modellingen_US
dc.subjectsubglacial lakesen_US
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Geofag: 450en_US
dc.subjectVDP::Mathematics and natural science: 400::Geosciences: 450en_US
dc.titleEurasian ice-sheet dynamics and sensitivity to subglacial hydrologyen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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