Solid Earth Uplift Due To Contemporary Ice Melt Above Low‐Viscosity Regions of the Upper Mantle
Abstract Glacial isostatic adjustment explains topographic change in formerly and currently glaciated regions, but the role of small (∼100s km) regions of unusually low‐viscosity mantle is poorly understood. We developed viscoelastic models with low‐viscosity regions in the upper mantle, and measure...
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Online Access: | https://doi.org/10.1029/2022GL099731 https://doaj.org/article/75450111b28e4f10a723807dcf3a8004 |
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ftdoajarticles:oai:doaj.org/article:75450111b28e4f10a723807dcf3a8004 2024-09-15T17:48:13+00:00 Solid Earth Uplift Due To Contemporary Ice Melt Above Low‐Viscosity Regions of the Upper Mantle Maaike F. M. Weerdesteijn Clinton P. Conrad John B. Naliboff 2022-09-01T00:00:00Z https://doi.org/10.1029/2022GL099731 https://doaj.org/article/75450111b28e4f10a723807dcf3a8004 EN eng Wiley https://doi.org/10.1029/2022GL099731 https://doaj.org/toc/0094-8276 https://doaj.org/toc/1944-8007 1944-8007 0094-8276 doi:10.1029/2022GL099731 https://doaj.org/article/75450111b28e4f10a723807dcf3a8004 Geophysical Research Letters, Vol 49, Iss 17, Pp n/a-n/a (2022) glacial isostatic adjustment numerical modeling viscosity variations contemporary ice melt viscous deformation Geophysics. Cosmic physics QC801-809 article 2022 ftdoajarticles https://doi.org/10.1029/2022GL099731 2024-08-05T17:49:10Z Abstract Glacial isostatic adjustment explains topographic change in formerly and currently glaciated regions, but the role of small (∼100s km) regions of unusually low‐viscosity mantle is poorly understood. We developed viscoelastic models with low‐viscosity regions in the upper mantle, and measured the effect of these regions on solid earth uplift resulting from contemporary surface ice melt. We found viscous uplift occurring on decadal timescales above the low‐viscosity region, at rates comparable to or larger than those from elastic uplift or the viscous response to ice age melting. We find that uplift rates are sensitive to the location, dimensions, and viscosity of the low‐viscosity region, and that the largest uncertainty in uplift rates likely comes from the low‐viscosity region's horizontal extent. Rapid viscous ground uplift can impact ice dynamics if the low‐viscosity region is located close to an ice sheet margin, as for Antarctica and Greenland. Article in Journal/Newspaper Antarc* Antarctica Greenland Ice Sheet Directory of Open Access Journals: DOAJ Articles Geophysical Research Letters 49 17 |
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Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
glacial isostatic adjustment numerical modeling viscosity variations contemporary ice melt viscous deformation Geophysics. Cosmic physics QC801-809 |
spellingShingle |
glacial isostatic adjustment numerical modeling viscosity variations contemporary ice melt viscous deformation Geophysics. Cosmic physics QC801-809 Maaike F. M. Weerdesteijn Clinton P. Conrad John B. Naliboff Solid Earth Uplift Due To Contemporary Ice Melt Above Low‐Viscosity Regions of the Upper Mantle |
topic_facet |
glacial isostatic adjustment numerical modeling viscosity variations contemporary ice melt viscous deformation Geophysics. Cosmic physics QC801-809 |
description |
Abstract Glacial isostatic adjustment explains topographic change in formerly and currently glaciated regions, but the role of small (∼100s km) regions of unusually low‐viscosity mantle is poorly understood. We developed viscoelastic models with low‐viscosity regions in the upper mantle, and measured the effect of these regions on solid earth uplift resulting from contemporary surface ice melt. We found viscous uplift occurring on decadal timescales above the low‐viscosity region, at rates comparable to or larger than those from elastic uplift or the viscous response to ice age melting. We find that uplift rates are sensitive to the location, dimensions, and viscosity of the low‐viscosity region, and that the largest uncertainty in uplift rates likely comes from the low‐viscosity region's horizontal extent. Rapid viscous ground uplift can impact ice dynamics if the low‐viscosity region is located close to an ice sheet margin, as for Antarctica and Greenland. |
format |
Article in Journal/Newspaper |
author |
Maaike F. M. Weerdesteijn Clinton P. Conrad John B. Naliboff |
author_facet |
Maaike F. M. Weerdesteijn Clinton P. Conrad John B. Naliboff |
author_sort |
Maaike F. M. Weerdesteijn |
title |
Solid Earth Uplift Due To Contemporary Ice Melt Above Low‐Viscosity Regions of the Upper Mantle |
title_short |
Solid Earth Uplift Due To Contemporary Ice Melt Above Low‐Viscosity Regions of the Upper Mantle |
title_full |
Solid Earth Uplift Due To Contemporary Ice Melt Above Low‐Viscosity Regions of the Upper Mantle |
title_fullStr |
Solid Earth Uplift Due To Contemporary Ice Melt Above Low‐Viscosity Regions of the Upper Mantle |
title_full_unstemmed |
Solid Earth Uplift Due To Contemporary Ice Melt Above Low‐Viscosity Regions of the Upper Mantle |
title_sort |
solid earth uplift due to contemporary ice melt above low‐viscosity regions of the upper mantle |
publisher |
Wiley |
publishDate |
2022 |
url |
https://doi.org/10.1029/2022GL099731 https://doaj.org/article/75450111b28e4f10a723807dcf3a8004 |
genre |
Antarc* Antarctica Greenland Ice Sheet |
genre_facet |
Antarc* Antarctica Greenland Ice Sheet |
op_source |
Geophysical Research Letters, Vol 49, Iss 17, Pp n/a-n/a (2022) |
op_relation |
https://doi.org/10.1029/2022GL099731 https://doaj.org/toc/0094-8276 https://doaj.org/toc/1944-8007 1944-8007 0094-8276 doi:10.1029/2022GL099731 https://doaj.org/article/75450111b28e4f10a723807dcf3a8004 |
op_doi |
https://doi.org/10.1029/2022GL099731 |
container_title |
Geophysical Research Letters |
container_volume |
49 |
container_issue |
17 |
_version_ |
1810289383355449344 |