Ice-flow reorganization in West Antarctica 2.5 kyr ago dated using radar-derived englacial flow velocities
We date a recent ice-flow reorganization of an ice divide in the Weddell Sea Sector, West Antarctica, using a novel combination of inverse methods and ice-penetrating radars. We invert for two-dimensional ice flow within an ice divide from data collected with a phase-sensitive ice-penetrating radar...
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ftdatacite:10.7916/d8pz592d 2023-05-15T13:49:48+02:00 Ice-flow reorganization in West Antarctica 2.5 kyr ago dated using radar-derived englacial flow velocities Kingslake, Jonathan Martín, Carlos Arthern, Robert J. Corr, Hugh F. J. King, Edward C. 2016 https://dx.doi.org/10.7916/d8pz592d https://academiccommons.columbia.edu/doi/10.7916/D8PZ592D unknown Columbia University https://dx.doi.org/10.1002/2016gl070278 Ice--Dynamics Glaciology Ice sheets Geophysics Hydrology Text Articles article-journal ScholarlyArticle 2016 ftdatacite https://doi.org/10.7916/d8pz592d https://doi.org/10.1002/2016gl070278 2021-11-05T12:55:41Z We date a recent ice-flow reorganization of an ice divide in the Weddell Sea Sector, West Antarctica, using a novel combination of inverse methods and ice-penetrating radars. We invert for two-dimensional ice flow within an ice divide from data collected with a phase-sensitive ice-penetrating radar while accounting for the effect of firn on radar propagation and ice flow. By comparing isochronal layers simulated using radar-derived flow velocities with internal layers observed with an impulse radar, we show that the divide's internal structure is not in a steady state but underwent a disturbance, potentially implying a regional ice-flow reorganization, 2.5 (1.8–2.9) kyr B.P. Our data are consistent with slow ice flow in this location before the reorganization and the ice divide subsequently remaining stationary. These findings increase our knowledge of the glacial history of a region that lacks dated constraints on late-Holocene ice-sheet retreat and provides a key target for models that reconstruct and predict ice-sheet behavior. Text Antarc* Antarctica Ice Sheet Weddell Sea West Antarctica DataCite Metadata Store (German National Library of Science and Technology) Weddell Sea West Antarctica Weddell |
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collection |
DataCite Metadata Store (German National Library of Science and Technology) |
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language |
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topic |
Ice--Dynamics Glaciology Ice sheets Geophysics Hydrology |
spellingShingle |
Ice--Dynamics Glaciology Ice sheets Geophysics Hydrology Kingslake, Jonathan Martín, Carlos Arthern, Robert J. Corr, Hugh F. J. King, Edward C. Ice-flow reorganization in West Antarctica 2.5 kyr ago dated using radar-derived englacial flow velocities |
topic_facet |
Ice--Dynamics Glaciology Ice sheets Geophysics Hydrology |
description |
We date a recent ice-flow reorganization of an ice divide in the Weddell Sea Sector, West Antarctica, using a novel combination of inverse methods and ice-penetrating radars. We invert for two-dimensional ice flow within an ice divide from data collected with a phase-sensitive ice-penetrating radar while accounting for the effect of firn on radar propagation and ice flow. By comparing isochronal layers simulated using radar-derived flow velocities with internal layers observed with an impulse radar, we show that the divide's internal structure is not in a steady state but underwent a disturbance, potentially implying a regional ice-flow reorganization, 2.5 (1.8–2.9) kyr B.P. Our data are consistent with slow ice flow in this location before the reorganization and the ice divide subsequently remaining stationary. These findings increase our knowledge of the glacial history of a region that lacks dated constraints on late-Holocene ice-sheet retreat and provides a key target for models that reconstruct and predict ice-sheet behavior. |
format |
Text |
author |
Kingslake, Jonathan Martín, Carlos Arthern, Robert J. Corr, Hugh F. J. King, Edward C. |
author_facet |
Kingslake, Jonathan Martín, Carlos Arthern, Robert J. Corr, Hugh F. J. King, Edward C. |
author_sort |
Kingslake, Jonathan |
title |
Ice-flow reorganization in West Antarctica 2.5 kyr ago dated using radar-derived englacial flow velocities |
title_short |
Ice-flow reorganization in West Antarctica 2.5 kyr ago dated using radar-derived englacial flow velocities |
title_full |
Ice-flow reorganization in West Antarctica 2.5 kyr ago dated using radar-derived englacial flow velocities |
title_fullStr |
Ice-flow reorganization in West Antarctica 2.5 kyr ago dated using radar-derived englacial flow velocities |
title_full_unstemmed |
Ice-flow reorganization in West Antarctica 2.5 kyr ago dated using radar-derived englacial flow velocities |
title_sort |
ice-flow reorganization in west antarctica 2.5 kyr ago dated using radar-derived englacial flow velocities |
publisher |
Columbia University |
publishDate |
2016 |
url |
https://dx.doi.org/10.7916/d8pz592d https://academiccommons.columbia.edu/doi/10.7916/D8PZ592D |
geographic |
Weddell Sea West Antarctica Weddell |
geographic_facet |
Weddell Sea West Antarctica Weddell |
genre |
Antarc* Antarctica Ice Sheet Weddell Sea West Antarctica |
genre_facet |
Antarc* Antarctica Ice Sheet Weddell Sea West Antarctica |
op_relation |
https://dx.doi.org/10.1002/2016gl070278 |
op_doi |
https://doi.org/10.7916/d8pz592d https://doi.org/10.1002/2016gl070278 |
_version_ |
1766252300661161984 |