Erosion-driven vertical motions of the circum Arctic: Comparative analysis of modern topography
Deep 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 h...
Published in: | Journal of Geodynamics |
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ftoslouniv:oai:www.duo.uio.no:10852/66442 2023-05-15T14:18:09+02:00 Erosion-driven vertical motions of the circum Arctic: Comparative analysis of modern topography Medvedev, Sergei Hartz, Ebbe Hvidegård Faleide, Jan Inge 2018-08-01T10:57:19Z http://hdl.handle.net/10852/66442 http://urn.nb.no/URN:NBN:no-69643 https://doi.org/10.1016/j.jog.2018.04.003 EN eng NFR/223272 http://urn.nb.no/URN:NBN:no-69643 Medvedev, 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 http://hdl.handle.net/10852/66442 1599297 info: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 Journal of Geodynamics 119 62 81 http://dx.doi.org/10.1016/j.jog.2018.04.003 URN:NBN:no-69643 Fulltext https://www.duo.uio.no/bitstream/handle/10852/66442/1/Medvedev_etal_2018_Cristin.pdf Attribution-NonCommercial-NoDerivatives 4.0 International https://creativecommons.org/licenses/by-nc-nd/4.0/ CC-BY-NC-ND 0264-3707 Journal article Tidsskriftartikkel Peer reviewed AcceptedVersion 2018 ftoslouniv https://doi.org/10.1016/j.jog.2018.04.003 2020-06-21T08:53:07Z Deep 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/ Article in Journal/Newspaper Archipelago Arctic Arctic Archipelago Arctic Canadian Arctic Archipelago Greenland Alaska Siberia Universitet i Oslo: Digitale utgivelser ved UiO (DUO) Arctic Canadian Arctic Archipelago Greenland Journal of Geodynamics 119 62 81 |
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Open Polar |
collection |
Universitet i Oslo: Digitale utgivelser ved UiO (DUO) |
op_collection_id |
ftoslouniv |
language |
English |
description |
Deep 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/ |
format |
Article in Journal/Newspaper |
author |
Medvedev, Sergei Hartz, Ebbe Hvidegård Faleide, Jan Inge |
spellingShingle |
Medvedev, Sergei Hartz, Ebbe Hvidegård Faleide, Jan Inge Erosion-driven vertical motions of the circum Arctic: Comparative analysis of modern topography |
author_facet |
Medvedev, Sergei Hartz, Ebbe Hvidegård Faleide, Jan Inge |
author_sort |
Medvedev, Sergei |
title |
Erosion-driven vertical motions of the circum Arctic: Comparative analysis of modern topography |
title_short |
Erosion-driven vertical motions of the circum Arctic: Comparative analysis of modern topography |
title_full |
Erosion-driven vertical motions of the circum Arctic: Comparative analysis of modern topography |
title_fullStr |
Erosion-driven vertical motions of the circum Arctic: Comparative analysis of modern topography |
title_full_unstemmed |
Erosion-driven vertical motions of the circum Arctic: Comparative analysis of modern topography |
title_sort |
erosion-driven vertical motions of the circum arctic: comparative analysis of modern topography |
publishDate |
2018 |
url |
http://hdl.handle.net/10852/66442 http://urn.nb.no/URN:NBN:no-69643 https://doi.org/10.1016/j.jog.2018.04.003 |
geographic |
Arctic Canadian Arctic Archipelago Greenland |
geographic_facet |
Arctic Canadian Arctic Archipelago Greenland |
genre |
Archipelago Arctic Arctic Archipelago Arctic Canadian Arctic Archipelago Greenland Alaska Siberia |
genre_facet |
Archipelago Arctic Arctic Archipelago Arctic Canadian Arctic Archipelago Greenland Alaska Siberia |
op_source |
0264-3707 |
op_relation |
NFR/223272 http://urn.nb.no/URN:NBN:no-69643 Medvedev, 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 http://hdl.handle.net/10852/66442 1599297 info: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 Journal of Geodynamics 119 62 81 http://dx.doi.org/10.1016/j.jog.2018.04.003 URN:NBN:no-69643 Fulltext https://www.duo.uio.no/bitstream/handle/10852/66442/1/Medvedev_etal_2018_Cristin.pdf |
op_rights |
Attribution-NonCommercial-NoDerivatives 4.0 International https://creativecommons.org/licenses/by-nc-nd/4.0/ |
op_rightsnorm |
CC-BY-NC-ND |
op_doi |
https://doi.org/10.1016/j.jog.2018.04.003 |
container_title |
Journal of Geodynamics |
container_volume |
119 |
container_start_page |
62 |
op_container_end_page |
81 |
_version_ |
1766289859965616128 |