First airborne gravity results over the Thwaites Glacier catchment, West Antarctica
Recent satellite observations of Thwaites Glacier in the Amundsen Sea Embayment, West Antarctica, have shown that the glacier is changing rapidly. The causes of its dynamic behavior are uncertain but are of concern because this glacier has the most negative mass balance of all Antarctic glaciers. To...
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American Geophysical Union
2008
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Online Access: | http://nora.nerc.ac.uk/id/eprint/11442/ http://www.agu.org/journals/gc/gc0804/2007GC001878/2007GC001878.pdf |
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ftnerc:oai:nora.nerc.ac.uk:11442 2023-05-15T13:24:00+02:00 First airborne gravity results over the Thwaites Glacier catchment, West Antarctica Diehl, Theresa M. Holt, John W. Blankenship, Donald D. Young, Duncan A. Jordan, Tom A. Ferraccioli, Fausto 2008 http://nora.nerc.ac.uk/id/eprint/11442/ http://www.agu.org/journals/gc/gc0804/2007GC001878/2007GC001878.pdf unknown American Geophysical Union Diehl, Theresa M.; Holt, John W.; Blankenship, Donald D.; Young, Duncan A.; Jordan, Tom A. orcid:0000-0003-2780-1986 Ferraccioli, Fausto orcid:0000-0002-9347-4736 . 2008 First airborne gravity results over the Thwaites Glacier catchment, West Antarctica. Geochemistry, Geophysics, Geosystems, 9 (4), Q04011. 10, pp. https://doi.org/10.1029/2007GC001878 <https://doi.org/10.1029/2007GC001878> Glaciology Publication - Article PeerReviewed 2008 ftnerc https://doi.org/10.1029/2007GC001878 2023-02-04T19:27:21Z Recent satellite observations of Thwaites Glacier in the Amundsen Sea Embayment, West Antarctica, have shown that the glacier is changing rapidly. The causes of its dynamic behavior are uncertain but are of concern because this glacier has the most negative mass balance of all Antarctic glaciers. To better understand Thwaites Glacier's subglacial setting, we conducted a multi- instrumented aerogeophysical survey of its catchment and present here the first gravity results. We employed a new gravimeter, and it performed well despite extreme conditions and an unusual survey design. The unleveled free- air gravity anomalies have a 2.3 mGal RMS error and a 9 km spatial resolution. Despite slightly higher than standard noise levels, the free- air anomalies correlate well with radar- derived subglacial topography. The new airborne gravity data assist in interpreting radar- identified bedrock features and are an ideal basis for future studies of subglacial geology and its control on the dynamics of Thwaites Glacier. Article in Journal/Newspaper Amundsen Sea Antarc* Antarctic Antarctica Thwaites Glacier West Antarctica Natural Environment Research Council: NERC Open Research Archive Amundsen Sea Antarctic Thwaites Glacier ENVELOPE(-106.750,-106.750,-75.500,-75.500) West Antarctica Geochemistry, Geophysics, Geosystems 9 4 n/a n/a |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
unknown |
topic |
Glaciology |
spellingShingle |
Glaciology Diehl, Theresa M. Holt, John W. Blankenship, Donald D. Young, Duncan A. Jordan, Tom A. Ferraccioli, Fausto First airborne gravity results over the Thwaites Glacier catchment, West Antarctica |
topic_facet |
Glaciology |
description |
Recent satellite observations of Thwaites Glacier in the Amundsen Sea Embayment, West Antarctica, have shown that the glacier is changing rapidly. The causes of its dynamic behavior are uncertain but are of concern because this glacier has the most negative mass balance of all Antarctic glaciers. To better understand Thwaites Glacier's subglacial setting, we conducted a multi- instrumented aerogeophysical survey of its catchment and present here the first gravity results. We employed a new gravimeter, and it performed well despite extreme conditions and an unusual survey design. The unleveled free- air gravity anomalies have a 2.3 mGal RMS error and a 9 km spatial resolution. Despite slightly higher than standard noise levels, the free- air anomalies correlate well with radar- derived subglacial topography. The new airborne gravity data assist in interpreting radar- identified bedrock features and are an ideal basis for future studies of subglacial geology and its control on the dynamics of Thwaites Glacier. |
format |
Article in Journal/Newspaper |
author |
Diehl, Theresa M. Holt, John W. Blankenship, Donald D. Young, Duncan A. Jordan, Tom A. Ferraccioli, Fausto |
author_facet |
Diehl, Theresa M. Holt, John W. Blankenship, Donald D. Young, Duncan A. Jordan, Tom A. Ferraccioli, Fausto |
author_sort |
Diehl, Theresa M. |
title |
First airborne gravity results over the Thwaites Glacier catchment, West Antarctica |
title_short |
First airborne gravity results over the Thwaites Glacier catchment, West Antarctica |
title_full |
First airborne gravity results over the Thwaites Glacier catchment, West Antarctica |
title_fullStr |
First airborne gravity results over the Thwaites Glacier catchment, West Antarctica |
title_full_unstemmed |
First airborne gravity results over the Thwaites Glacier catchment, West Antarctica |
title_sort |
first airborne gravity results over the thwaites glacier catchment, west antarctica |
publisher |
American Geophysical Union |
publishDate |
2008 |
url |
http://nora.nerc.ac.uk/id/eprint/11442/ http://www.agu.org/journals/gc/gc0804/2007GC001878/2007GC001878.pdf |
long_lat |
ENVELOPE(-106.750,-106.750,-75.500,-75.500) |
geographic |
Amundsen Sea Antarctic Thwaites Glacier West Antarctica |
geographic_facet |
Amundsen Sea Antarctic Thwaites Glacier West Antarctica |
genre |
Amundsen Sea Antarc* Antarctic Antarctica Thwaites Glacier West Antarctica |
genre_facet |
Amundsen Sea Antarc* Antarctic Antarctica Thwaites Glacier West Antarctica |
op_relation |
Diehl, Theresa M.; Holt, John W.; Blankenship, Donald D.; Young, Duncan A.; Jordan, Tom A. orcid:0000-0003-2780-1986 Ferraccioli, Fausto orcid:0000-0002-9347-4736 . 2008 First airborne gravity results over the Thwaites Glacier catchment, West Antarctica. Geochemistry, Geophysics, Geosystems, 9 (4), Q04011. 10, pp. https://doi.org/10.1029/2007GC001878 <https://doi.org/10.1029/2007GC001878> |
op_doi |
https://doi.org/10.1029/2007GC001878 |
container_title |
Geochemistry, Geophysics, Geosystems |
container_volume |
9 |
container_issue |
4 |
container_start_page |
n/a |
op_container_end_page |
n/a |
_version_ |
1766376878331920384 |