Observations of Buried Lake Drainage on the Antarctic Ice Sheet
Between 1992 and 2017, the Antarctic Ice Sheet (AIS) lost ice equivalent to 7.6 ± 3.9 mm of sea level rise. AIS mass loss is mitigated by ice shelves that provide a buttress by regulating ice flow from tributary glaciers. However, ice-shelf stability is threatened by meltwater ponding, which may ini...
Published in: | Geophysical Research Letters |
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2020
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fttudelft:oai:tudelft.nl:uuid:27f2180b-367b-4dd2-8f4f-66636b105f3a 2024-04-28T08:02:45+00:00 Observations of Buried Lake Drainage on the Antarctic Ice Sheet Dunmire, D. (author) Lenaerts, J.T.M. (author) Banwell, Alison (author) Wever, N. (author) Shragge, J. (author) Lhermitte, S.L.M. (author) Drews, R. (author) Pattyn, F. (author) Hansen, J.S.S. (author) Willis, I.C. (author) Miller, J. (author) Keenan, E. (author) 2020 http://resolver.tudelft.nl/uuid:27f2180b-367b-4dd2-8f4f-66636b105f3a https://doi.org/10.1029/2020GL087970 en eng http://www.scopus.com/inward/record.url?scp=85089391394&partnerID=8YFLogxK Geophysical Research Letters--0094-8276--06456208-fd35-4a1a-bb03-32af520213ad http://resolver.tudelft.nl/uuid:27f2180b-367b-4dd2-8f4f-66636b105f3a https://doi.org/10.1029/2020GL087970 © 2020 D. Dunmire, J.T.M. Lenaerts, Alison Banwell, N. Wever, J. Shragge, S.L.M. Lhermitte, R. Drews, F. Pattyn, J.S.S. Hansen, I.C. Willis, J. Miller, E. Keenan Antartica glaciology GPR hydrofracture hydrology meltwater journal article 2020 fttudelft https://doi.org/10.1029/2020GL087970 2024-04-10T00:01:42Z Between 1992 and 2017, the Antarctic Ice Sheet (AIS) lost ice equivalent to 7.6 ± 3.9 mm of sea level rise. AIS mass loss is mitigated by ice shelves that provide a buttress by regulating ice flow from tributary glaciers. However, ice-shelf stability is threatened by meltwater ponding, which may initiate, or reactivate preexisting, fractures, currently poorly understood processes. Here, through ground penetrating radar (GPR) analysis over a buried lake in the grounding zone of an East Antarctic ice shelf, we present the first field observations of a lake drainage event in Antarctica via vertical fractures. Concurrent with the lake drainage event, we observe a decrease in surface elevation and an increase in Sentinel-1 backscatter. Finally, we suggest that fractures that are initiated or reactivated by lake drainage events in a grounding zone will propagate with ice flow onto the ice shelf itself, where they may have implications for its stability. Mathematical Geodesy and Positioning Article in Journal/Newspaper Antarc* Antarctic Antarctica antartic* Ice Sheet Ice Shelf Ice Shelves Delft University of Technology: Institutional Repository Geophysical Research Letters 47 15 |
institution |
Open Polar |
collection |
Delft University of Technology: Institutional Repository |
op_collection_id |
fttudelft |
language |
English |
topic |
Antartica glaciology GPR hydrofracture hydrology meltwater |
spellingShingle |
Antartica glaciology GPR hydrofracture hydrology meltwater Dunmire, D. (author) Lenaerts, J.T.M. (author) Banwell, Alison (author) Wever, N. (author) Shragge, J. (author) Lhermitte, S.L.M. (author) Drews, R. (author) Pattyn, F. (author) Hansen, J.S.S. (author) Willis, I.C. (author) Miller, J. (author) Keenan, E. (author) Observations of Buried Lake Drainage on the Antarctic Ice Sheet |
topic_facet |
Antartica glaciology GPR hydrofracture hydrology meltwater |
description |
Between 1992 and 2017, the Antarctic Ice Sheet (AIS) lost ice equivalent to 7.6 ± 3.9 mm of sea level rise. AIS mass loss is mitigated by ice shelves that provide a buttress by regulating ice flow from tributary glaciers. However, ice-shelf stability is threatened by meltwater ponding, which may initiate, or reactivate preexisting, fractures, currently poorly understood processes. Here, through ground penetrating radar (GPR) analysis over a buried lake in the grounding zone of an East Antarctic ice shelf, we present the first field observations of a lake drainage event in Antarctica via vertical fractures. Concurrent with the lake drainage event, we observe a decrease in surface elevation and an increase in Sentinel-1 backscatter. Finally, we suggest that fractures that are initiated or reactivated by lake drainage events in a grounding zone will propagate with ice flow onto the ice shelf itself, where they may have implications for its stability. Mathematical Geodesy and Positioning |
format |
Article in Journal/Newspaper |
author |
Dunmire, D. (author) Lenaerts, J.T.M. (author) Banwell, Alison (author) Wever, N. (author) Shragge, J. (author) Lhermitte, S.L.M. (author) Drews, R. (author) Pattyn, F. (author) Hansen, J.S.S. (author) Willis, I.C. (author) Miller, J. (author) Keenan, E. (author) |
author_facet |
Dunmire, D. (author) Lenaerts, J.T.M. (author) Banwell, Alison (author) Wever, N. (author) Shragge, J. (author) Lhermitte, S.L.M. (author) Drews, R. (author) Pattyn, F. (author) Hansen, J.S.S. (author) Willis, I.C. (author) Miller, J. (author) Keenan, E. (author) |
author_sort |
Dunmire, D. (author) |
title |
Observations of Buried Lake Drainage on the Antarctic Ice Sheet |
title_short |
Observations of Buried Lake Drainage on the Antarctic Ice Sheet |
title_full |
Observations of Buried Lake Drainage on the Antarctic Ice Sheet |
title_fullStr |
Observations of Buried Lake Drainage on the Antarctic Ice Sheet |
title_full_unstemmed |
Observations of Buried Lake Drainage on the Antarctic Ice Sheet |
title_sort |
observations of buried lake drainage on the antarctic ice sheet |
publishDate |
2020 |
url |
http://resolver.tudelft.nl/uuid:27f2180b-367b-4dd2-8f4f-66636b105f3a https://doi.org/10.1029/2020GL087970 |
genre |
Antarc* Antarctic Antarctica antartic* Ice Sheet Ice Shelf Ice Shelves |
genre_facet |
Antarc* Antarctic Antarctica antartic* Ice Sheet Ice Shelf Ice Shelves |
op_relation |
http://www.scopus.com/inward/record.url?scp=85089391394&partnerID=8YFLogxK Geophysical Research Letters--0094-8276--06456208-fd35-4a1a-bb03-32af520213ad http://resolver.tudelft.nl/uuid:27f2180b-367b-4dd2-8f4f-66636b105f3a https://doi.org/10.1029/2020GL087970 |
op_rights |
© 2020 D. Dunmire, J.T.M. Lenaerts, Alison Banwell, N. Wever, J. Shragge, S.L.M. Lhermitte, R. Drews, F. Pattyn, J.S.S. Hansen, I.C. Willis, J. Miller, E. Keenan |
op_doi |
https://doi.org/10.1029/2020GL087970 |
container_title |
Geophysical Research Letters |
container_volume |
47 |
container_issue |
15 |
_version_ |
1797574031172435968 |