Subglacial discharge weakens the stability of the Ross Ice Shelf around the grounding line
In this paper, we examine potential impact of discharge in Subglacial Lake Engelhardt, West Antarctica, on the stability of the Ross Ice Shelf around the grounding line by combining satellite altimetry and remote sensing images. According to satellite altimetry data from the Ice, Cloud and Land Elev...
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Norwegian Polar Institute
2021
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Online Access: | https://doi.org/10.33265/polar.v40.3377 https://doaj.org/article/531db77ad20c4cbca0063662d5f40f6f |
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fttriple:oai:gotriple.eu:oai:doaj.org/article:531db77ad20c4cbca0063662d5f40f6f 2023-05-15T13:56:28+02:00 Subglacial discharge weakens the stability of the Ross Ice Shelf around the grounding line Yan Li Hongling Shi Yang Lu Zizhan Zhang Hui Xi 2021-01-01 https://doi.org/10.33265/polar.v40.3377 https://doaj.org/article/531db77ad20c4cbca0063662d5f40f6f en eng Norwegian Polar Institute 1751-8369 doi:10.33265/polar.v40.3377 https://doaj.org/article/531db77ad20c4cbca0063662d5f40f6f undefined Polar Research, Vol 40, Iss 0, Pp 1-11 (2021) antarctic subglacial lakes water storage change satellite altimetry remote sensing hydraulic potential method geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2021 fttriple https://doi.org/10.33265/polar.v40.3377 2023-01-22T18:21:08Z In this paper, we examine potential impact of discharge in Subglacial Lake Engelhardt, West Antarctica, on the stability of the Ross Ice Shelf around the grounding line by combining satellite altimetry and remote sensing images. According to satellite altimetry data from the Ice, Cloud and Land Elevation Satellite (ICESat; 2003–06), Subglacial Lake Engelhardt (SLE) discharged ca. 1.91 ± 0.04 km3 of water into the downstream region. The ice-surface record derived from ICESat (2006–09) and CryoSat-2 (2011–17) data shows that the lake gained ca. 2.09 ± 0.05 km3 of water during the refilling event following the drainage event, taking three times as much time to reach the previous water level before the discharge; the calculation demonstrates that water input from an upstream lake is unable to sustain water increase in SLE, indicating that the subglacial, hydrologic system and groundwater flow could have contributed to water increase in SLE via hydrologic networks. Satellite images captured surface depressions and crevasses at the drainage outlet point of hydrologic networks around the grounding line; satellite altimetry data show that the ice surface there is still depressing even though the subglacial discharge has finished, potentially reflecting the long-term impact of subglacial discharge on the stability of the immediate Ross Ice Shelf around the grounding line. Article in Journal/Newspaper Antarc* Antarctic Antarctica Ice Shelf Polar Research Ross Ice Shelf West Antarctica Unknown Antarctic West Antarctica Ross Ice Shelf Polar Research 40 |
institution |
Open Polar |
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Unknown |
op_collection_id |
fttriple |
language |
English |
topic |
antarctic subglacial lakes water storage change satellite altimetry remote sensing hydraulic potential method geo envir |
spellingShingle |
antarctic subglacial lakes water storage change satellite altimetry remote sensing hydraulic potential method geo envir Yan Li Hongling Shi Yang Lu Zizhan Zhang Hui Xi Subglacial discharge weakens the stability of the Ross Ice Shelf around the grounding line |
topic_facet |
antarctic subglacial lakes water storage change satellite altimetry remote sensing hydraulic potential method geo envir |
description |
In this paper, we examine potential impact of discharge in Subglacial Lake Engelhardt, West Antarctica, on the stability of the Ross Ice Shelf around the grounding line by combining satellite altimetry and remote sensing images. According to satellite altimetry data from the Ice, Cloud and Land Elevation Satellite (ICESat; 2003–06), Subglacial Lake Engelhardt (SLE) discharged ca. 1.91 ± 0.04 km3 of water into the downstream region. The ice-surface record derived from ICESat (2006–09) and CryoSat-2 (2011–17) data shows that the lake gained ca. 2.09 ± 0.05 km3 of water during the refilling event following the drainage event, taking three times as much time to reach the previous water level before the discharge; the calculation demonstrates that water input from an upstream lake is unable to sustain water increase in SLE, indicating that the subglacial, hydrologic system and groundwater flow could have contributed to water increase in SLE via hydrologic networks. Satellite images captured surface depressions and crevasses at the drainage outlet point of hydrologic networks around the grounding line; satellite altimetry data show that the ice surface there is still depressing even though the subglacial discharge has finished, potentially reflecting the long-term impact of subglacial discharge on the stability of the immediate Ross Ice Shelf around the grounding line. |
format |
Article in Journal/Newspaper |
author |
Yan Li Hongling Shi Yang Lu Zizhan Zhang Hui Xi |
author_facet |
Yan Li Hongling Shi Yang Lu Zizhan Zhang Hui Xi |
author_sort |
Yan Li |
title |
Subglacial discharge weakens the stability of the Ross Ice Shelf around the grounding line |
title_short |
Subglacial discharge weakens the stability of the Ross Ice Shelf around the grounding line |
title_full |
Subglacial discharge weakens the stability of the Ross Ice Shelf around the grounding line |
title_fullStr |
Subglacial discharge weakens the stability of the Ross Ice Shelf around the grounding line |
title_full_unstemmed |
Subglacial discharge weakens the stability of the Ross Ice Shelf around the grounding line |
title_sort |
subglacial discharge weakens the stability of the ross ice shelf around the grounding line |
publisher |
Norwegian Polar Institute |
publishDate |
2021 |
url |
https://doi.org/10.33265/polar.v40.3377 https://doaj.org/article/531db77ad20c4cbca0063662d5f40f6f |
geographic |
Antarctic West Antarctica Ross Ice Shelf |
geographic_facet |
Antarctic West Antarctica Ross Ice Shelf |
genre |
Antarc* Antarctic Antarctica Ice Shelf Polar Research Ross Ice Shelf West Antarctica |
genre_facet |
Antarc* Antarctic Antarctica Ice Shelf Polar Research Ross Ice Shelf West Antarctica |
op_source |
Polar Research, Vol 40, Iss 0, Pp 1-11 (2021) |
op_relation |
1751-8369 doi:10.33265/polar.v40.3377 https://doaj.org/article/531db77ad20c4cbca0063662d5f40f6f |
op_rights |
undefined |
op_doi |
https://doi.org/10.33265/polar.v40.3377 |
container_title |
Polar Research |
container_volume |
40 |
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1766263981819822080 |