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dc.contributor.authorShackleton, Calvin
dc.contributor.authorPatton, Henry
dc.contributor.authorHubbard, Alun Lloyd
dc.contributor.authorWinsborrow, Monica
dc.contributor.authorKingslake, Jonathan
dc.contributor.authorEsteves, Mariana da Silveira Ramos
dc.contributor.authorAndreassen, Karin
dc.contributor.authorGreenwood, Sarah L.
dc.date.accessioned2018-11-05T08:35:30Z
dc.date.available2018-11-05T08:35:30Z
dc.date.issued2018-10-17
dc.description.abstractSubglacial hydrology modulates how ice sheets flow, respond to climate, and deliver meltwater, sediment and nutrients to proglacial and marine environments. Here, we investigate the development of subglacial lakes and drainage networks beneath the Fennoscandian and Barents Sea ice sheets over the Late Weichselian. Utilizing an established coupled climate/ice flow model, we calculate high-resolution, spatio-temporal changes in subglacial hydraulic potential from ice sheet build-up (∼37 ka BP) to complete deglaciation (∼10 ka BP). Our analysis predicts up to 3500 potential subglacial lakes, the largest of which was 658 km2, and over 70% of which had surface areas <10 km2, comparable with subglacial lake-size distributions beneath the Antarctic Ice Sheet. Asynchronous evolution of the Fennoscandian Ice Sheet into the flatter relief of northeast Europe affected patterns of subglacial drainage, with up to 100 km3 more water impounded within subglacial lakes during ice build-up compared to retreat. Furthermore, we observe frequent fill/drain cycles within clusters of subglacial lakes at the onset zones and margins of ice streams that would have affected their dynamics. Our results resonate with mapping of large subglacial channel networks indicative of high-discharge meltwater drainage through the Gulf of Bothnia and central Barents Sea. By tracking the migration of meltwater drainage outlets during deglaciation, we constrain locations most susceptible to focussed discharge, including the western continental shelf-break where subglacial sediment delivery led to the development of major trough-mouth fans. Maps of hydraulic potential minima that persist throughout the Late Weichselian reveal potential sites for preserved subglacial lake sediments, thereby defining useful targets for further field-investigation.en_US
dc.descriptionAccepted manuscript version. Published version available at <a href=https://doi.org/10.1016/j.quascirev.2018.10.007> https://doi.org/10.1016/j.quascirev.2018.10.007</a>. Licensed <a href=http://creativecommons.org/licenses/by-nc-nd/4.0/> CC BY-NC-ND 4.0.</a>en_US
dc.identifier.citationShackleton, C., Patton, H., Hubbard, A.L., Winsborrow, M., Kingslake, J., Esteves, M.d.S.R., ... Greenwood, S.L. (2018). Subglacial water storage and drainage beneath the Fennoscandian and Barents Sea ice sheets. Quaternary Science Reviews, 201, 13-28. https://doi.org/10.1016/j.quascirev.2018.10.007en_US
dc.identifier.cristinIDFRIDAID 1623468
dc.identifier.doi10.1016/j.quascirev.2018.10.007
dc.identifier.issn0277-3791
dc.identifier.issn1873-457X
dc.identifier.urihttps://hdl.handle.net/10037/14088
dc.language.isoengen_US
dc.publisherElsevieren_US
dc.relation.journalQuaternary Science Reviews
dc.relation.projectIDinfo:eu-repo/grantAgreement/RCN/SFF/223259/Norway/Centre for Arctic Gas Hydrate, Environment and Climate/CAGE/en_US
dc.relation.projectIDinfo:eu-repo/grantAgreement/RCN/PETROMAKS2/200672/Norway/Glaciations in the Barents Sea area//en_US
dc.rights.accessRightsopenAccessen_US
dc.subjectVDP::Mathematics and natural science: 400::Geosciences: 450::Hydrogeology: 467en_US
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Hydrogeologi: 467en_US
dc.subjectSubglacial lakesen_US
dc.subjectBasal hydrologyen_US
dc.subjectMeltwater drainageen_US
dc.subjectFennoscandian ice sheeten_US
dc.subjectBarents sea ice sheeten_US
dc.subjectEurasian ice sheet complexen_US
dc.subjectlate Weichselian deglaciationen_US
dc.subjectlate Weichselianen_US
dc.subjectLast glacial maximumen_US
dc.subjectGlacial geologyen_US
dc.subjectGlaciationen_US
dc.titleSubglacial water storage and drainage beneath the Fennoscandian and Barents Sea ice sheetsen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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