Bathymetry of the Amundsen Sea Embayment sector of West Antarctica from Operation IceBridge gravity and other data
We employ airborne gravity data from NASA's Operation IceBridge collected in 2009–2014 to infer the bathymetry of sub–ice shelf cavities in front of Pine Island, Thwaites, Smith, and Kohler glaciers, West Antarctica. We use a three-dimensional inversion constrained by multibeam echo sounding da...
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ftcdlib:oai:escholarship.org/ark:/13030/qt9jq0j78c 2023-05-15T13:24:00+02:00 Bathymetry of the Amundsen Sea Embayment sector of West Antarctica from Operation IceBridge gravity and other data Millan, R Rignot, E Bernier, V Morlighem, M Dutrieux, P 1360 - 1368 2017-02-16 application/pdf https://escholarship.org/uc/item/9jq0j78c unknown eScholarship, University of California qt9jq0j78c https://escholarship.org/uc/item/9jq0j78c public Geophysical Research Letters, vol 44, iss 3 Meteorology & Atmospheric Sciences article 2017 ftcdlib 2021-05-30T17:54:37Z We employ airborne gravity data from NASA's Operation IceBridge collected in 2009–2014 to infer the bathymetry of sub–ice shelf cavities in front of Pine Island, Thwaites, Smith, and Kohler glaciers, West Antarctica. We use a three-dimensional inversion constrained by multibeam echo sounding data offshore and bed topography from a mass conservation reconstruction on land. The seamless bed elevation data refine details of the Pine Island sub–ice shelf cavity, a slightly thinner cavity beneath Thwaites, and previously unknown deep (>1200m) channels beneath the Crosson and Dotson ice shelves that shallow (500m and 750m, respectively) near the ice shelf fronts. These sub–ice shelf channels define the natural pathways for warm, circumpolar deep water to reach the glacier grounding lines, melt the ice shelves from below, and constrain the pattern of past and future glacial retreat. Article in Journal/Newspaper Amundsen Sea Antarc* Antarctica Ice Shelf Ice Shelves Pine Island West Antarctica University of California: eScholarship West Antarctica Amundsen Sea |
institution |
Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
unknown |
topic |
Meteorology & Atmospheric Sciences |
spellingShingle |
Meteorology & Atmospheric Sciences Millan, R Rignot, E Bernier, V Morlighem, M Dutrieux, P Bathymetry of the Amundsen Sea Embayment sector of West Antarctica from Operation IceBridge gravity and other data |
topic_facet |
Meteorology & Atmospheric Sciences |
description |
We employ airborne gravity data from NASA's Operation IceBridge collected in 2009–2014 to infer the bathymetry of sub–ice shelf cavities in front of Pine Island, Thwaites, Smith, and Kohler glaciers, West Antarctica. We use a three-dimensional inversion constrained by multibeam echo sounding data offshore and bed topography from a mass conservation reconstruction on land. The seamless bed elevation data refine details of the Pine Island sub–ice shelf cavity, a slightly thinner cavity beneath Thwaites, and previously unknown deep (>1200m) channels beneath the Crosson and Dotson ice shelves that shallow (500m and 750m, respectively) near the ice shelf fronts. These sub–ice shelf channels define the natural pathways for warm, circumpolar deep water to reach the glacier grounding lines, melt the ice shelves from below, and constrain the pattern of past and future glacial retreat. |
format |
Article in Journal/Newspaper |
author |
Millan, R Rignot, E Bernier, V Morlighem, M Dutrieux, P |
author_facet |
Millan, R Rignot, E Bernier, V Morlighem, M Dutrieux, P |
author_sort |
Millan, R |
title |
Bathymetry of the Amundsen Sea Embayment sector of West Antarctica from Operation IceBridge gravity and other data |
title_short |
Bathymetry of the Amundsen Sea Embayment sector of West Antarctica from Operation IceBridge gravity and other data |
title_full |
Bathymetry of the Amundsen Sea Embayment sector of West Antarctica from Operation IceBridge gravity and other data |
title_fullStr |
Bathymetry of the Amundsen Sea Embayment sector of West Antarctica from Operation IceBridge gravity and other data |
title_full_unstemmed |
Bathymetry of the Amundsen Sea Embayment sector of West Antarctica from Operation IceBridge gravity and other data |
title_sort |
bathymetry of the amundsen sea embayment sector of west antarctica from operation icebridge gravity and other data |
publisher |
eScholarship, University of California |
publishDate |
2017 |
url |
https://escholarship.org/uc/item/9jq0j78c |
op_coverage |
1360 - 1368 |
geographic |
West Antarctica Amundsen Sea |
geographic_facet |
West Antarctica Amundsen Sea |
genre |
Amundsen Sea Antarc* Antarctica Ice Shelf Ice Shelves Pine Island West Antarctica |
genre_facet |
Amundsen Sea Antarc* Antarctica Ice Shelf Ice Shelves Pine Island West Antarctica |
op_source |
Geophysical Research Letters, vol 44, iss 3 |
op_relation |
qt9jq0j78c https://escholarship.org/uc/item/9jq0j78c |
op_rights |
public |
_version_ |
1766376917377744896 |