Basal melt of the southern Filchner Ice Shelf, Antarctica
Basal melt of ice shelves is a key factor governing discharge of ice from the Antarctic Ice Sheet as a result of its effects on buttressing. Here, we use radio echo sounding to determine the spatial variability of the basal melt rate of the southern Filchner Ice Shelf, Antarctica, along the inflow o...
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fttriple:oai:gotriple.eu:oai:doaj.org/article:c8adc12bf3354e3398435f5084f10799 2023-05-15T13:36:21+02:00 Basal melt of the southern Filchner Ice Shelf, Antarctica O. Zeising D. Steinhage K. W. Nicholls H. F. J. Corr C. L. Stewart A. Humbert 2022-04-01 https://doi.org/10.5194/tc-16-1469-2022 https://tc.copernicus.org/articles/16/1469/2022/tc-16-1469-2022.pdf https://doaj.org/article/c8adc12bf3354e3398435f5084f10799 en eng Copernicus Publications doi:10.5194/tc-16-1469-2022 1994-0416 1994-0424 https://tc.copernicus.org/articles/16/1469/2022/tc-16-1469-2022.pdf https://doaj.org/article/c8adc12bf3354e3398435f5084f10799 undefined The Cryosphere, Vol 16, Pp 1469-1482 (2022) geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2022 fttriple https://doi.org/10.5194/tc-16-1469-2022 2023-01-22T19:19:14Z Basal melt of ice shelves is a key factor governing discharge of ice from the Antarctic Ice Sheet as a result of its effects on buttressing. Here, we use radio echo sounding to determine the spatial variability of the basal melt rate of the southern Filchner Ice Shelf, Antarctica, along the inflow of Support Force Glacier. We find moderate melt rates with a maximum of 1.13 m a−1 about 50 km downstream of the grounding line. The variability of the melt rates over distances of a few kilometres is low (all but one < 0.15 m a−1 at < 2 km distance), indicating that measurements on coarse observational grids are able to yield a representative melt rate distribution. A comparison with remote-sensing-based melt rates revealed that, for the study area, large differences were due to inaccuracies in the estimation of vertical strain rates from remote sensing velocity fields. These inaccuracies can be overcome by using modern velocity fields. Article in Journal/Newspaper Antarc* Antarctic Antarctica Ice Sheet Ice Shelf Ice Shelves Support Force Glacier The Cryosphere Unknown Antarctic Filchner Ice Shelf ENVELOPE(-40.000,-40.000,-79.000,-79.000) Support Force Glacier ENVELOPE(-47.500,-47.500,-83.083,-83.083) The Antarctic The Cryosphere 16 4 1469 1482 |
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English |
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geo envir |
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geo envir O. Zeising D. Steinhage K. W. Nicholls H. F. J. Corr C. L. Stewart A. Humbert Basal melt of the southern Filchner Ice Shelf, Antarctica |
topic_facet |
geo envir |
description |
Basal melt of ice shelves is a key factor governing discharge of ice from the Antarctic Ice Sheet as a result of its effects on buttressing. Here, we use radio echo sounding to determine the spatial variability of the basal melt rate of the southern Filchner Ice Shelf, Antarctica, along the inflow of Support Force Glacier. We find moderate melt rates with a maximum of 1.13 m a−1 about 50 km downstream of the grounding line. The variability of the melt rates over distances of a few kilometres is low (all but one < 0.15 m a−1 at < 2 km distance), indicating that measurements on coarse observational grids are able to yield a representative melt rate distribution. A comparison with remote-sensing-based melt rates revealed that, for the study area, large differences were due to inaccuracies in the estimation of vertical strain rates from remote sensing velocity fields. These inaccuracies can be overcome by using modern velocity fields. |
format |
Article in Journal/Newspaper |
author |
O. Zeising D. Steinhage K. W. Nicholls H. F. J. Corr C. L. Stewart A. Humbert |
author_facet |
O. Zeising D. Steinhage K. W. Nicholls H. F. J. Corr C. L. Stewart A. Humbert |
author_sort |
O. Zeising |
title |
Basal melt of the southern Filchner Ice Shelf, Antarctica |
title_short |
Basal melt of the southern Filchner Ice Shelf, Antarctica |
title_full |
Basal melt of the southern Filchner Ice Shelf, Antarctica |
title_fullStr |
Basal melt of the southern Filchner Ice Shelf, Antarctica |
title_full_unstemmed |
Basal melt of the southern Filchner Ice Shelf, Antarctica |
title_sort |
basal melt of the southern filchner ice shelf, antarctica |
publisher |
Copernicus Publications |
publishDate |
2022 |
url |
https://doi.org/10.5194/tc-16-1469-2022 https://tc.copernicus.org/articles/16/1469/2022/tc-16-1469-2022.pdf https://doaj.org/article/c8adc12bf3354e3398435f5084f10799 |
long_lat |
ENVELOPE(-40.000,-40.000,-79.000,-79.000) ENVELOPE(-47.500,-47.500,-83.083,-83.083) |
geographic |
Antarctic Filchner Ice Shelf Support Force Glacier The Antarctic |
geographic_facet |
Antarctic Filchner Ice Shelf Support Force Glacier The Antarctic |
genre |
Antarc* Antarctic Antarctica Ice Sheet Ice Shelf Ice Shelves Support Force Glacier The Cryosphere |
genre_facet |
Antarc* Antarctic Antarctica Ice Sheet Ice Shelf Ice Shelves Support Force Glacier The Cryosphere |
op_source |
The Cryosphere, Vol 16, Pp 1469-1482 (2022) |
op_relation |
doi:10.5194/tc-16-1469-2022 1994-0416 1994-0424 https://tc.copernicus.org/articles/16/1469/2022/tc-16-1469-2022.pdf https://doaj.org/article/c8adc12bf3354e3398435f5084f10799 |
op_rights |
undefined |
op_doi |
https://doi.org/10.5194/tc-16-1469-2022 |
container_title |
The Cryosphere |
container_volume |
16 |
container_issue |
4 |
container_start_page |
1469 |
op_container_end_page |
1482 |
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1766077597704257536 |