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dc.date.accessioned2019-02-07T16:59:20Z
dc.date.created2018-08-01T10:57:19Z
dc.date.issued2018
dc.identifier.citationMedvedev, Sergei Hartz, Ebbe Hvidegård Faleide, Jan Inge . Erosion-driven vertical motions of the circum Arctic: Comparative analysis of modern topography. Journal of Geodynamics. 2018, 119, 62-81
dc.identifier.urihttp://hdl.handle.net/10852/66442
dc.description.abstractDeep and complex geodynamic processes, including the effects of plumes, heat, plate tectonics, and local tectonics control the Earth’s surface. In the Arctic these deep processes are masked by extensive glaciations and associated or roughly synchronous erosion. In this study we aim to reveal these hidden geodynamic processes by modeling erosion backward in time by numerically restoring eroded material and calculating the flexural isostatic response repeatedly iteratively until eroded features are filled. This method estimates erosion recorded in the modern topography and models the influence of that erosion. Although the obvious topographic response to erosion is a lowering of the elevation, our coupled erosion-isostatic response method results in dramatic vertical motions leading to km-scale uplift in fjord carved areas of Scandinavia, Greenland, and Canadian Arctic Archipelago and supporting ancient orogenic belts of northern Siberia and northern Alaska to stay at high elevation. Sensitivity testing confirms the utility of our method over a range of effective elastic plate thicknesses as well as for laterally varying elastic thickness. Comparison of modelling results with observed gravity anomalies shows that our method is valid for both glacial and fluvial affected landscapes but more importantly links surface and deep Earth dynamics. Combined analysis of the gravity anomalies and model results also explains erosion as one of the main mechanisms responsible for gravity signal for tectonically inactive regions and illustrates the interaction of short wavelength erosional processes and large scale, regional processes like active orogenesis and dynamic topography. © 2018. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/en_US
dc.languageEN
dc.language.isoenen_US
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/
dc.titleErosion-driven vertical motions of the circum Arctic: Comparative analysis of modern topographyen_US
dc.typeJournal articleen_US
dc.creator.authorMedvedev, Sergei
dc.creator.authorHartz, Ebbe Hvidegård
dc.creator.authorFaleide, Jan Inge
dc.date.embargoenddate2020-04-30
cristin.unitcode185,15,22,40
cristin.unitnameSenter for Jordens utvikling og dynamikk
cristin.ispublishedtrue
cristin.fulltextpostprint
cristin.qualitycode1
dc.identifier.cristin1599297
dc.identifier.bibliographiccitationinfo:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Journal of Geodynamics&rft.volume=119&rft.spage=62&rft.date=2018
dc.identifier.jtitleJournal of Geodynamics
dc.identifier.volume119
dc.identifier.startpage62
dc.identifier.endpage81
dc.identifier.doihttp://dx.doi.org/10.1016/j.jog.2018.04.003
dc.identifier.urnURN:NBN:no-69643
dc.type.documentTidsskriftartikkelen_US
dc.type.peerreviewedPeer reviewed
dc.source.issn0264-3707
dc.identifier.fulltextFulltext https://www.duo.uio.no/bitstream/handle/10852/66442/1/Medvedev_etal_2018_Cristin.pdf
dc.type.versionAcceptedVersion
dc.relation.projectNFR/223272


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