Ice flow variations at Polar Record Glacier, East Antarctica
Relatively little is known about the physical mechanisms that drive the dynamics of the East Antarctic outlet glaciers. Here we conduct a remote-sensing investigation of the Polar Record Glacier (PRG), East Antarctica to analyze its ice flow acceleration, ice front variations and ice surface melting...
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Cambridge University Press
2019
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Online Access: | https://doi.org/10.1017/jog.2019.6 https://doaj.org/article/e43cfc29ca7c4472866b46f058c0af55 |
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ftdoajarticles:oai:doaj.org/article:e43cfc29ca7c4472866b46f058c0af55 2023-05-15T13:33:02+02:00 Ice flow variations at Polar Record Glacier, East Antarctica QI LIANG CHUNXIA ZHOU IAN M. HOWAT SEONGSU JEONG RUIXI LIU YIMING CHEN 2019-04-01T00:00:00Z https://doi.org/10.1017/jog.2019.6 https://doaj.org/article/e43cfc29ca7c4472866b46f058c0af55 EN eng Cambridge University Press https://www.cambridge.org/core/product/identifier/S0022143019000066/type/journal_article https://doaj.org/toc/0022-1430 https://doaj.org/toc/1727-5652 doi:10.1017/jog.2019.6 0022-1430 1727-5652 https://doaj.org/article/e43cfc29ca7c4472866b46f058c0af55 Journal of Glaciology, Vol 65, Pp 279-287 (2019) glacier flow ice velocity melt–surface Environmental sciences GE1-350 Meteorology. Climatology QC851-999 article 2019 ftdoajarticles https://doi.org/10.1017/jog.2019.6 2023-03-12T01:30:57Z Relatively little is known about the physical mechanisms that drive the dynamics of the East Antarctic outlet glaciers. Here we conduct a remote-sensing investigation of the Polar Record Glacier (PRG), East Antarctica to analyze its ice flow acceleration, ice front variations and ice surface melting. Ice flow speeds at PRG increased by up to 15% from 2005 to 2015, with substantial interannual fluctuations. The ice velocities also showed seasonal variations, accelerating by up to 9% between September and January. Multiple mechanisms contribute to the observed seasonal variations: the initial acceleration may result from the lost back-stress provided by the sea ice in the austral spring and the later speedup relate to the surface meltwater that leads to weakened ice shelf and shear margins. The sensitivity of the PRG to oceanic forcing is confirmed by comparing the secular ice velocity increases with ocean temperatures. These measurements suggest that the dynamics of East Antarctic ice shelves are sensitive to melt at both the surface and base, at a range of timescales. Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica Ice Shelf Ice Shelves Journal of Glaciology Sea ice Directory of Open Access Journals: DOAJ Articles Antarctic Austral East Antarctica Polar Record Glacier ENVELOPE(75.431,75.431,-69.763,-69.763) Journal of Glaciology 65 250 279 287 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
glacier flow ice velocity melt–surface Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
spellingShingle |
glacier flow ice velocity melt–surface Environmental sciences GE1-350 Meteorology. Climatology QC851-999 QI LIANG CHUNXIA ZHOU IAN M. HOWAT SEONGSU JEONG RUIXI LIU YIMING CHEN Ice flow variations at Polar Record Glacier, East Antarctica |
topic_facet |
glacier flow ice velocity melt–surface Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
description |
Relatively little is known about the physical mechanisms that drive the dynamics of the East Antarctic outlet glaciers. Here we conduct a remote-sensing investigation of the Polar Record Glacier (PRG), East Antarctica to analyze its ice flow acceleration, ice front variations and ice surface melting. Ice flow speeds at PRG increased by up to 15% from 2005 to 2015, with substantial interannual fluctuations. The ice velocities also showed seasonal variations, accelerating by up to 9% between September and January. Multiple mechanisms contribute to the observed seasonal variations: the initial acceleration may result from the lost back-stress provided by the sea ice in the austral spring and the later speedup relate to the surface meltwater that leads to weakened ice shelf and shear margins. The sensitivity of the PRG to oceanic forcing is confirmed by comparing the secular ice velocity increases with ocean temperatures. These measurements suggest that the dynamics of East Antarctic ice shelves are sensitive to melt at both the surface and base, at a range of timescales. |
format |
Article in Journal/Newspaper |
author |
QI LIANG CHUNXIA ZHOU IAN M. HOWAT SEONGSU JEONG RUIXI LIU YIMING CHEN |
author_facet |
QI LIANG CHUNXIA ZHOU IAN M. HOWAT SEONGSU JEONG RUIXI LIU YIMING CHEN |
author_sort |
QI LIANG |
title |
Ice flow variations at Polar Record Glacier, East Antarctica |
title_short |
Ice flow variations at Polar Record Glacier, East Antarctica |
title_full |
Ice flow variations at Polar Record Glacier, East Antarctica |
title_fullStr |
Ice flow variations at Polar Record Glacier, East Antarctica |
title_full_unstemmed |
Ice flow variations at Polar Record Glacier, East Antarctica |
title_sort |
ice flow variations at polar record glacier, east antarctica |
publisher |
Cambridge University Press |
publishDate |
2019 |
url |
https://doi.org/10.1017/jog.2019.6 https://doaj.org/article/e43cfc29ca7c4472866b46f058c0af55 |
long_lat |
ENVELOPE(75.431,75.431,-69.763,-69.763) |
geographic |
Antarctic Austral East Antarctica Polar Record Glacier |
geographic_facet |
Antarctic Austral East Antarctica Polar Record Glacier |
genre |
Antarc* Antarctic Antarctica East Antarctica Ice Shelf Ice Shelves Journal of Glaciology Sea ice |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica Ice Shelf Ice Shelves Journal of Glaciology Sea ice |
op_source |
Journal of Glaciology, Vol 65, Pp 279-287 (2019) |
op_relation |
https://www.cambridge.org/core/product/identifier/S0022143019000066/type/journal_article https://doaj.org/toc/0022-1430 https://doaj.org/toc/1727-5652 doi:10.1017/jog.2019.6 0022-1430 1727-5652 https://doaj.org/article/e43cfc29ca7c4472866b46f058c0af55 |
op_doi |
https://doi.org/10.1017/jog.2019.6 |
container_title |
Journal of Glaciology |
container_volume |
65 |
container_issue |
250 |
container_start_page |
279 |
op_container_end_page |
287 |
_version_ |
1766038014711037952 |