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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ftjpolarres:oai:journals.openacademia.net:article/3377 2023-05-15T14:01:21+02:00 Subglacial discharge weakens the stability of the Ross Ice Shelf around the grounding line Li, Yan Shi, Hongling Lu, Yang Zhang, Zizhan Xi, Hui 2021-01-22 text/html application/pdf application/epub+zip text/xml https://polarresearch.net/index.php/polar/article/view/3377 https://doi.org/10.33265/polar.v40.3377 eng eng Norwegian Polar Institute https://polarresearch.net/index.php/polar/article/view/3377/13307 https://polarresearch.net/index.php/polar/article/view/3377/13305 https://polarresearch.net/index.php/polar/article/view/3377/13306 https://polarresearch.net/index.php/polar/article/view/3377/13308 https://polarresearch.net/index.php/polar/article/view/3377 doi:10.33265/polar.v40.3377 Copyright (c) 2021 Yan Li, Hongling Shi, Yang Lu, Zizhan Zhang, Hui Xi https://creativecommons.org/licenses/by-nd/4.0 CC-BY-ND Polar Research; Vol. 40 (2021) 1751-8369 Antarctic subglacial lakes water storage change satellite altimetry remote sensing hydraulic potential method info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2021 ftjpolarres https://doi.org/10.33265/polar.v40.3377 2021-11-11T19:14:06Z 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 km3of 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 km3of 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 Polar Research (E-Journal) Antarctic Ross Ice Shelf West Antarctica Polar Research 40 |
institution |
Open Polar |
collection |
Polar Research (E-Journal) |
op_collection_id |
ftjpolarres |
language |
English |
topic |
Antarctic subglacial lakes water storage change satellite altimetry remote sensing hydraulic potential method |
spellingShingle |
Antarctic subglacial lakes water storage change satellite altimetry remote sensing hydraulic potential method Li, Yan Shi, Hongling Lu, Yang Zhang, Zizhan Xi, Hui 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 |
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 km3of 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 km3of 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 |
Li, Yan Shi, Hongling Lu, Yang Zhang, Zizhan Xi, Hui |
author_facet |
Li, Yan Shi, Hongling Lu, Yang Zhang, Zizhan Xi, Hui |
author_sort |
Li, Yan |
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://polarresearch.net/index.php/polar/article/view/3377 https://doi.org/10.33265/polar.v40.3377 |
geographic |
Antarctic Ross Ice Shelf West Antarctica |
geographic_facet |
Antarctic Ross Ice Shelf West Antarctica |
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 (2021) 1751-8369 |
op_relation |
https://polarresearch.net/index.php/polar/article/view/3377/13307 https://polarresearch.net/index.php/polar/article/view/3377/13305 https://polarresearch.net/index.php/polar/article/view/3377/13306 https://polarresearch.net/index.php/polar/article/view/3377/13308 https://polarresearch.net/index.php/polar/article/view/3377 doi:10.33265/polar.v40.3377 |
op_rights |
Copyright (c) 2021 Yan Li, Hongling Shi, Yang Lu, Zizhan Zhang, Hui Xi https://creativecommons.org/licenses/by-nd/4.0 |
op_rightsnorm |
CC-BY-ND |
op_doi |
https://doi.org/10.33265/polar.v40.3377 |
container_title |
Polar Research |
container_volume |
40 |
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1766271097629573120 |