Show simple item record Hubbard, Alun L. Sugden, David Dugmore, Andrew Norddahl, Hreggvidur Pétursson, Halldór G. 2008-12-10T12:37:53Z 2008-12-10T12:37:53Z 2006-09-01
dc.identifier.citation Hubbard , A L , Sugden , D , Dugmore , A , Norddahl , H & Pétursson , H G 2006 , ' A modelling insight into the Icelandic Last Glacial Maximum ice sheet ' Quaternary Science Reviews , vol 25 , no. 17-18 , pp. 2283-2296 . DOI: 10.1016/j.quascirev.2006.04.001 en
dc.identifier.issn 0277-3971
dc.identifier.other PURE: 94327
dc.identifier.other PURE UUID: a1d535e2-9db6-4c6f-9239-e70b692f0394
dc.identifier.other dspace: 2160/1510
dc.identifier.other DSpace_20121128.csv: row: 1312
dc.identifier.other Scopus: 33747057995
dc.description Hubbard, Alun; Sugden, D.; Dugmore, A.; Norddahl, H., (2006) 'A modelling insight into the Icelandic Last Glacial Maximum ice sheet', Quaternary Science Reviews 25(17-18) pp.2283-2296 RAE2008 en
dc.description.abstract A three-dimensional thermomechanical model is used to investigate the Last Glacial Maximum (LGM) Icelandic ice sheet and the climate responsible for it at . A series of sensitivity experiments reveal that Iceland is susceptible to the onset large-scale glaciation with only a 3 °C cooling perturbation relative to recent (1961–1990) climate. A 5 °C cooling perturbation is enough to force an ice sheet to beyond the present day coastline in virtually all sectors. A suite of 15 experiments driven by a GRIP time-series for 15,000 years from a climatic optimum at 36 ka to 21 ka BP scaled with 5.0–15.0 °C maximum cooling perturbation are initiated in order to identify a best-fit LGM ice sheet configuration compatible with the available empirical evidence. The optimum LGM model isolated requires an annual cooling of 10.0–12.5 °C relative to the recent climatology with over 50% precipitation suppression across the north and yields an extensive offshore ice sheet with an area of and a volume of . Over-extension of ice extent across the northern shelf is addressed by the introduction of strong aridity across this region but otherwise the ice-sheet is well pinned to the continental shelf-break in remaining sectors which tends to decouple it from further climatic forcing. The optimum LGM ice-sheet has a substantial proportion of its base grounded below sea-level and is dominated by basal sliding which activates extensive zones of fast flow. This results in a highly dynamic, low aspect ice sheet with a mean ice thickness of 940 m and a plateau elevation of breached by numerous nunataks and ice-free zones providing potential, but spatially limited and frigid, ecological refugia through the vicissitudes of the LGM. en
dc.format.extent 14 en
dc.language.iso eng
dc.relation.ispartof Quaternary Science Reviews en
dc.rights en
dc.title A modelling insight into the Icelandic Last Glacial Maximum ice sheet en
dc.type /dk/atira/pure/researchoutput/researchoutputtypes/contributiontojournal/article en
dc.contributor.institution Department of Geography and Earth Sciences en
dc.contributor.institution Centre for Glaciology en
dc.description.status Peer reviewed en

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