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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Copernicus Publications
2022
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Online Access: | https://epic.awi.de/id/eprint/56010/ https://epic.awi.de/id/eprint/56010/1/tc-16-1469-2022.pdf https://hdl.handle.net/10013/epic.abbd7dc0-1d42-40ec-ae54-d2ce6ec27dba https://hdl.handle.net/ |
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ftawi:oai:epic.awi.de:56010 2023-05-15T13:45:22+02:00 Basal melt of the southern Filchner Ice Shelf, Antarctica Zeising, Ole Steinhage, Daniel Nicholls, Keith W. Corr, Hugh F. J. Stewart, Craig L. Humbert, Angelika 2022-04-27 application/pdf https://epic.awi.de/id/eprint/56010/ https://epic.awi.de/id/eprint/56010/1/tc-16-1469-2022.pdf https://hdl.handle.net/10013/epic.abbd7dc0-1d42-40ec-ae54-d2ce6ec27dba https://hdl.handle.net/ unknown Copernicus Publications https://epic.awi.de/id/eprint/56010/1/tc-16-1469-2022.pdf https://hdl.handle.net/ Zeising, O. orcid:0000-0002-1284-8098 , Steinhage, D. orcid:0000-0003-4737-9751 , Nicholls, K. W. , Corr, H. F. J. , Stewart, C. L. and Humbert, A. orcid:0000-0002-0244-8760 (2022) Basal melt of the southern Filchner Ice Shelf, Antarctica , The Cryosphere, 16 , pp. 1469-1482 . doi:10.5194/tc-16-1469-2022 <https://doi.org/10.5194/tc-16-1469-2022> , hdl:10013/epic.abbd7dc0-1d42-40ec-ae54-d2ce6ec27dba EPIC3The Cryosphere, Copernicus Publications, 16, pp. 1469-1482 Article isiRev 2022 ftawi https://doi.org/10.5194/tc-16-1469-2022 2022-05-15T23:10:21Z 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 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 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 Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Antarctic The 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 Cryosphere 16 4 1469 1482 |
institution |
Open Polar |
collection |
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
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 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 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 |
Zeising, Ole Steinhage, Daniel Nicholls, Keith W. Corr, Hugh F. J. Stewart, Craig L. Humbert, Angelika |
spellingShingle |
Zeising, Ole Steinhage, Daniel Nicholls, Keith W. Corr, Hugh F. J. Stewart, Craig L. Humbert, Angelika Basal melt of the southern Filchner Ice Shelf, Antarctica |
author_facet |
Zeising, Ole Steinhage, Daniel Nicholls, Keith W. Corr, Hugh F. J. Stewart, Craig L. Humbert, Angelika |
author_sort |
Zeising, Ole |
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://epic.awi.de/id/eprint/56010/ https://epic.awi.de/id/eprint/56010/1/tc-16-1469-2022.pdf https://hdl.handle.net/10013/epic.abbd7dc0-1d42-40ec-ae54-d2ce6ec27dba https://hdl.handle.net/ |
long_lat |
ENVELOPE(-40.000,-40.000,-79.000,-79.000) ENVELOPE(-47.500,-47.500,-83.083,-83.083) |
geographic |
Antarctic The Antarctic Filchner Ice Shelf Support Force Glacier |
geographic_facet |
Antarctic The Antarctic Filchner Ice Shelf Support Force Glacier |
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 |
EPIC3The Cryosphere, Copernicus Publications, 16, pp. 1469-1482 |
op_relation |
https://epic.awi.de/id/eprint/56010/1/tc-16-1469-2022.pdf https://hdl.handle.net/ Zeising, O. orcid:0000-0002-1284-8098 , Steinhage, D. orcid:0000-0003-4737-9751 , Nicholls, K. W. , Corr, H. F. J. , Stewart, C. L. and Humbert, A. orcid:0000-0002-0244-8760 (2022) Basal melt of the southern Filchner Ice Shelf, Antarctica , The Cryosphere, 16 , pp. 1469-1482 . doi:10.5194/tc-16-1469-2022 <https://doi.org/10.5194/tc-16-1469-2022> , hdl:10013/epic.abbd7dc0-1d42-40ec-ae54-d2ce6ec27dba |
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 |
_version_ |
1766222831142567936 |