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dc.contributor.authorPatton, Henry Jared
dc.contributor.authorAlexandropoulou, Nikolitsa
dc.contributor.authorLasabuda, Amando P. E.
dc.contributor.authorKnies, Jochen Manfred
dc.contributor.authorAndreassen, Karin Marie
dc.contributor.authorWinsborrow, Monica Caroline Mackay
dc.contributor.authorLaberg, Jan Sverre
dc.contributor.authorHubbard, Alun Lloyd
dc.date.accessioned2024-10-02T12:33:40Z
dc.date.available2024-10-02T12:33:40Z
dc.date.issued2024-09-19
dc.description.abstractMultiple ice age cycles spanning the last three million years have fundamentally transformed the Arctic landscape. The cadence, intensity and pattern of this glacial modification underpin the stability of Arctic geosystems over geologic time scales, including its hydrology, circulation patterns, slope stability, hydrocarbon fluid flow, geochemical/sediment cycling and nutrient supply. The Barents Shelf provides a unique arena to investigate long-term landscape evolution as it has undergone significant glacial modification during the Quaternary and has an extensive stratigraphic data repository motivated by decades of hydrocarbon seismic and well exploration. Here, we assimilate new geological datasets with ice sheet erosion modelling to incrementally reconstruct the geomorphic evolution of the Eurasian Arctic domain over each of the 47 glaciations since the intensification of Northern Hemisphere glaciation ~2.74 Ma. We utilise this time-transgressive framework to review hypotheses regarding the heterogenous development of the Barents Shelf and the timing of key topographic reconfiguration episodes. Our results demonstrate that up to 2.6 km of bedrock was glacially removed to the shelf margins, and though the mean rate of erosion declines over the Quaternary, the efficacy of glacial erosion has a more complex timeline. Initially, erosion was highly effective as large expanses of the Eurasian Arctic switched from subaerial exposure to marine conditions around 2 Ma. Thereafter, erosional efficacy decreased as the landscape desensitised to successive glaciations but, after 1 Ma, it increased as a dynamic, marine-based ice sheet drained by ice streams expanded, selectively eroding large outlet troughs to the shelf edge. Critically for Arctic climate, at ~0.69 Ma this episode of enhanced preferential erosion opened up the Barents Seaway establishing a new circulation pathway between the Atlantic and Arctic Oceans. Our 4D landscape reconstruction provides key boundary conditions for paleoclimate models and establishes a new framework for assessing the profound impact of late-Cenozoic glaciation on the Eurasian Arctic landscape.en_US
dc.identifier.citationPatton H, Alexandropoulou N, Lasabuda AL, Knies J, Andreassen K, Winsborrow M, Laberg JS, Hubbard AL. Glacial erosion and quaternary landscape development of the Eurasian Arctic. Earth-Science Reviews. 2024;258en_US
dc.identifier.cristinIDFRIDAID 2299981
dc.identifier.doi10.1016/j.earscirev.2024.104936
dc.identifier.issn0012-8252
dc.identifier.issn1872-6828
dc.identifier.urihttps://hdl.handle.net/10037/34976
dc.language.isoengen_US
dc.publisherElsevieren_US
dc.relation.journalEarth-Science Reviews
dc.relation.projectIDinfo:eu-repo/grantAgreement/EC/H2020/101102324/EU/Barents Sea Arctic Cenozoic Evolution and Paleogeographical Reconstructions/BRAVO/en_US
dc.rights.accessRightsopenAccessen_US
dc.rights.holderCopyright 2024 The Author(s)en_US
dc.rights.urihttps://creativecommons.org/licenses/by/4.0en_US
dc.rightsAttribution 4.0 International (CC BY 4.0)en_US
dc.titleGlacial erosion and quaternary landscape development of the Eurasian Arcticen_US
dc.type.versionpublishedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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Attribution 4.0 International (CC BY 4.0)
Med mindre det står noe annet, er denne innførselens lisens beskrevet som Attribution 4.0 International (CC BY 4.0)