Grounding line retreat of Totten Glacier, East Antarctica, 1996 to 2013
© 2015. American Geophysical Union. All Rights Reserved. Totten Glacier, East Antarctica, a glacier that holds a 3.9 m sea level change equivalent, has thinned and lost mass for decades. We map its grounding line positions in 1996 and 2013 using differential radar interferometry (InSAR) data and dev...
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Online Access: | https://escholarship.org/uc/item/0rh48089 https://escholarship.org/content/qt0rh48089/qt0rh48089.pdf https://doi.org/10.1002/2015gl065701 |
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ftcdlib:oai:escholarship.org:ark:/13030/qt0rh48089 2024-09-15T17:41:50+00:00 Grounding line retreat of Totten Glacier, East Antarctica, 1996 to 2013 Li, Xin Rignot, Eric Morlighem, Mathieu Mouginot, Jeremie Scheuchl, Bernd 8049 - 8056 2015-10-16 application/pdf https://escholarship.org/uc/item/0rh48089 https://escholarship.org/content/qt0rh48089/qt0rh48089.pdf https://doi.org/10.1002/2015gl065701 unknown eScholarship, University of California qt0rh48089 https://escholarship.org/uc/item/0rh48089 https://escholarship.org/content/qt0rh48089/qt0rh48089.pdf doi:10.1002/2015gl065701 public Geophysical Research Letters, vol 42, iss 19 Climate Action Antarctica grounding line radar interferometry radar sounding remote sensing glaciology Meteorology & Atmospheric Sciences article 2015 ftcdlib https://doi.org/10.1002/2015gl065701 2024-06-28T06:28:20Z © 2015. American Geophysical Union. All Rights Reserved. Totten Glacier, East Antarctica, a glacier that holds a 3.9 m sea level change equivalent, has thinned and lost mass for decades. We map its grounding line positions in 1996 and 2013 using differential radar interferometry (InSAR) data and develop precise, high-resolution topographies of its ice surface and ice draft using NASA Operation IceBridge data, InSAR data, and a mass conservation method. We detect a 1 to 3 km retreat of the grounding line in 17 years. The retreat is asymmetrical along a two-lobe pattern, where ice is only grounded a few 10 m above sea level, or ice plain, which may unground further with only modest amounts of ice thinning. The pattern of retreat indicates ice thinning of 12 m in 17 years or 0.7±0.1 m/yr at the grounding line on average. Sustained thinning will cause further grounding line retreat but may not be conducive to a marine instability. Article in Journal/Newspaper Antarc* Antarctica East Antarctica Totten Glacier University of California: eScholarship Geophysical Research Letters 42 19 8049 8056 |
institution |
Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
unknown |
topic |
Climate Action Antarctica grounding line radar interferometry radar sounding remote sensing glaciology Meteorology & Atmospheric Sciences |
spellingShingle |
Climate Action Antarctica grounding line radar interferometry radar sounding remote sensing glaciology Meteorology & Atmospheric Sciences Li, Xin Rignot, Eric Morlighem, Mathieu Mouginot, Jeremie Scheuchl, Bernd Grounding line retreat of Totten Glacier, East Antarctica, 1996 to 2013 |
topic_facet |
Climate Action Antarctica grounding line radar interferometry radar sounding remote sensing glaciology Meteorology & Atmospheric Sciences |
description |
© 2015. American Geophysical Union. All Rights Reserved. Totten Glacier, East Antarctica, a glacier that holds a 3.9 m sea level change equivalent, has thinned and lost mass for decades. We map its grounding line positions in 1996 and 2013 using differential radar interferometry (InSAR) data and develop precise, high-resolution topographies of its ice surface and ice draft using NASA Operation IceBridge data, InSAR data, and a mass conservation method. We detect a 1 to 3 km retreat of the grounding line in 17 years. The retreat is asymmetrical along a two-lobe pattern, where ice is only grounded a few 10 m above sea level, or ice plain, which may unground further with only modest amounts of ice thinning. The pattern of retreat indicates ice thinning of 12 m in 17 years or 0.7±0.1 m/yr at the grounding line on average. Sustained thinning will cause further grounding line retreat but may not be conducive to a marine instability. |
format |
Article in Journal/Newspaper |
author |
Li, Xin Rignot, Eric Morlighem, Mathieu Mouginot, Jeremie Scheuchl, Bernd |
author_facet |
Li, Xin Rignot, Eric Morlighem, Mathieu Mouginot, Jeremie Scheuchl, Bernd |
author_sort |
Li, Xin |
title |
Grounding line retreat of Totten Glacier, East Antarctica, 1996 to 2013 |
title_short |
Grounding line retreat of Totten Glacier, East Antarctica, 1996 to 2013 |
title_full |
Grounding line retreat of Totten Glacier, East Antarctica, 1996 to 2013 |
title_fullStr |
Grounding line retreat of Totten Glacier, East Antarctica, 1996 to 2013 |
title_full_unstemmed |
Grounding line retreat of Totten Glacier, East Antarctica, 1996 to 2013 |
title_sort |
grounding line retreat of totten glacier, east antarctica, 1996 to 2013 |
publisher |
eScholarship, University of California |
publishDate |
2015 |
url |
https://escholarship.org/uc/item/0rh48089 https://escholarship.org/content/qt0rh48089/qt0rh48089.pdf https://doi.org/10.1002/2015gl065701 |
op_coverage |
8049 - 8056 |
genre |
Antarc* Antarctica East Antarctica Totten Glacier |
genre_facet |
Antarc* Antarctica East Antarctica Totten Glacier |
op_source |
Geophysical Research Letters, vol 42, iss 19 |
op_relation |
qt0rh48089 https://escholarship.org/uc/item/0rh48089 https://escholarship.org/content/qt0rh48089/qt0rh48089.pdf doi:10.1002/2015gl065701 |
op_rights |
public |
op_doi |
https://doi.org/10.1002/2015gl065701 |
container_title |
Geophysical Research Letters |
container_volume |
42 |
container_issue |
19 |
container_start_page |
8049 |
op_container_end_page |
8056 |
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1810488110905032704 |