Grounding line, ice frontal position and coastal ice masks for the Marie Byrd Land Sector of West Antarctica, 2003-2015
Over the past 20 years satellite remote sensing has captured significant downwasting of glaciers that drain the West Antarctic Ice Sheet into the ocean, particularly across the Amundsen Sea Sector. Along the neighbouring Marie Byrd Land Sector, situated west of Thwaites Glacier to Ross Ice Shelf, gl...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.884782 2023-05-15T13:24:10+02:00 Grounding line, ice frontal position and coastal ice masks for the Marie Byrd Land Sector of West Antarctica, 2003-2015 Christie, Frazer D W Bingham, Robert G Bisset, Rosie R MEDIAN LATITUDE: -75.391665 * MEDIAN LONGITUDE: -136.266670 * SOUTH-BOUND LATITUDE: -77.500000 * WEST-BOUND LONGITUDE: -158.416670 * NORTH-BOUND LATITUDE: -73.283330 * EAST-BOUND LONGITUDE: -114.116670 2018-01-11 application/zip, 2 datasets https://doi.pangaea.de/10.1594/PANGAEA.884782 https://doi.org/10.1594/PANGAEA.884782 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.884782 https://doi.org/10.1594/PANGAEA.884782 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Christie, Frazer D W; Bingham, Robert G; Gourmelen, Noel; Steig, Eric J; Bisset, Rosie R; Pritchard, Hamish D; Snow, Kate; Tett, Simon F B (2018): Glacier change along West Antarctica's Marie Byrd Land Sector and links to inter-decadal atmosphere-ocean variability. The Cryosphere, 12(7), 2461-2479, https://doi.org/10.5194/tc-12-2461-2018 Antarctic MarieByrdLand MULT Multiple investigations Dataset 2018 ftpangaea https://doi.org/10.1594/PANGAEA.884782 https://doi.org/10.5194/tc-12-2461-2018 2023-01-20T07:34:05Z Over the past 20 years satellite remote sensing has captured significant downwasting of glaciers that drain the West Antarctic Ice Sheet into the ocean, particularly across the Amundsen Sea Sector. Along the neighbouring Marie Byrd Land Sector, situated west of Thwaites Glacier to Ross Ice Shelf, glaciological change has been only sparsely monitored. Here, we use optical satellite imagery to track grounding-line migration along the Marie Byrd Land Sector between 2003 and 2015, and compare observed changes with ICESat and CryoSat-2-derived surface elevation and thickness change records. During the observational period, 33% of the grounding line underwent retreat. The greatest retreat rates were observed along the 650-km-long Getz Ice Shelf, further west of which only minor retreat occurred. The relative glaciological stability west of Getz Ice Shelf can be attributed to a divergence of the Antarctic Circumpolar Current from the continental-shelf break at 135° W, coincident with a transition in the morphology of the continental shelf. Along Getz Ice Shelf, grounding-line retreat reduced by 68% during the CryoSat-2 era relative to earlier observations. This slowdown is a likely response to reduced oceanic forcing, as inferred from climate reanalysis data. Collectively, our findings underscore the importance of spatial and inter-decadal variability in climate and ocean interactions in moderating glaciological change around Antarctica. Dataset Amundsen Sea Antarc* Antarctic Antarctica Getz Ice Shelf Ice Sheet Ice Shelf Marie Byrd Land Ross Ice Shelf The Cryosphere Thwaites Glacier West Antarctica PANGAEA - Data Publisher for Earth & Environmental Science Antarctic The Antarctic West Antarctica Amundsen Sea West Antarctic Ice Sheet Ross Ice Shelf Byrd Marie Byrd Land ENVELOPE(-130.000,-130.000,-78.000,-78.000) Thwaites Glacier ENVELOPE(-106.750,-106.750,-75.500,-75.500) Getz ENVELOPE(-145.217,-145.217,-76.550,-76.550) Getz Ice Shelf ENVELOPE(-126.500,-126.500,-74.250,-74.250) ENVELOPE(-158.416670,-114.116670,-73.283330,-77.500000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Antarctic MarieByrdLand MULT Multiple investigations |
spellingShingle |
Antarctic MarieByrdLand MULT Multiple investigations Christie, Frazer D W Bingham, Robert G Bisset, Rosie R Grounding line, ice frontal position and coastal ice masks for the Marie Byrd Land Sector of West Antarctica, 2003-2015 |
topic_facet |
Antarctic MarieByrdLand MULT Multiple investigations |
description |
Over the past 20 years satellite remote sensing has captured significant downwasting of glaciers that drain the West Antarctic Ice Sheet into the ocean, particularly across the Amundsen Sea Sector. Along the neighbouring Marie Byrd Land Sector, situated west of Thwaites Glacier to Ross Ice Shelf, glaciological change has been only sparsely monitored. Here, we use optical satellite imagery to track grounding-line migration along the Marie Byrd Land Sector between 2003 and 2015, and compare observed changes with ICESat and CryoSat-2-derived surface elevation and thickness change records. During the observational period, 33% of the grounding line underwent retreat. The greatest retreat rates were observed along the 650-km-long Getz Ice Shelf, further west of which only minor retreat occurred. The relative glaciological stability west of Getz Ice Shelf can be attributed to a divergence of the Antarctic Circumpolar Current from the continental-shelf break at 135° W, coincident with a transition in the morphology of the continental shelf. Along Getz Ice Shelf, grounding-line retreat reduced by 68% during the CryoSat-2 era relative to earlier observations. This slowdown is a likely response to reduced oceanic forcing, as inferred from climate reanalysis data. Collectively, our findings underscore the importance of spatial and inter-decadal variability in climate and ocean interactions in moderating glaciological change around Antarctica. |
format |
Dataset |
author |
Christie, Frazer D W Bingham, Robert G Bisset, Rosie R |
author_facet |
Christie, Frazer D W Bingham, Robert G Bisset, Rosie R |
author_sort |
Christie, Frazer D W |
title |
Grounding line, ice frontal position and coastal ice masks for the Marie Byrd Land Sector of West Antarctica, 2003-2015 |
title_short |
Grounding line, ice frontal position and coastal ice masks for the Marie Byrd Land Sector of West Antarctica, 2003-2015 |
title_full |
Grounding line, ice frontal position and coastal ice masks for the Marie Byrd Land Sector of West Antarctica, 2003-2015 |
title_fullStr |
Grounding line, ice frontal position and coastal ice masks for the Marie Byrd Land Sector of West Antarctica, 2003-2015 |
title_full_unstemmed |
Grounding line, ice frontal position and coastal ice masks for the Marie Byrd Land Sector of West Antarctica, 2003-2015 |
title_sort |
grounding line, ice frontal position and coastal ice masks for the marie byrd land sector of west antarctica, 2003-2015 |
publisher |
PANGAEA |
publishDate |
2018 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.884782 https://doi.org/10.1594/PANGAEA.884782 |
op_coverage |
MEDIAN LATITUDE: -75.391665 * MEDIAN LONGITUDE: -136.266670 * SOUTH-BOUND LATITUDE: -77.500000 * WEST-BOUND LONGITUDE: -158.416670 * NORTH-BOUND LATITUDE: -73.283330 * EAST-BOUND LONGITUDE: -114.116670 |
long_lat |
ENVELOPE(-130.000,-130.000,-78.000,-78.000) ENVELOPE(-106.750,-106.750,-75.500,-75.500) ENVELOPE(-145.217,-145.217,-76.550,-76.550) ENVELOPE(-126.500,-126.500,-74.250,-74.250) ENVELOPE(-158.416670,-114.116670,-73.283330,-77.500000) |
geographic |
Antarctic The Antarctic West Antarctica Amundsen Sea West Antarctic Ice Sheet Ross Ice Shelf Byrd Marie Byrd Land Thwaites Glacier Getz Getz Ice Shelf |
geographic_facet |
Antarctic The Antarctic West Antarctica Amundsen Sea West Antarctic Ice Sheet Ross Ice Shelf Byrd Marie Byrd Land Thwaites Glacier Getz Getz Ice Shelf |
genre |
Amundsen Sea Antarc* Antarctic Antarctica Getz Ice Shelf Ice Sheet Ice Shelf Marie Byrd Land Ross Ice Shelf The Cryosphere Thwaites Glacier West Antarctica |
genre_facet |
Amundsen Sea Antarc* Antarctic Antarctica Getz Ice Shelf Ice Sheet Ice Shelf Marie Byrd Land Ross Ice Shelf The Cryosphere Thwaites Glacier West Antarctica |
op_source |
Supplement to: Christie, Frazer D W; Bingham, Robert G; Gourmelen, Noel; Steig, Eric J; Bisset, Rosie R; Pritchard, Hamish D; Snow, Kate; Tett, Simon F B (2018): Glacier change along West Antarctica's Marie Byrd Land Sector and links to inter-decadal atmosphere-ocean variability. The Cryosphere, 12(7), 2461-2479, https://doi.org/10.5194/tc-12-2461-2018 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.884782 https://doi.org/10.1594/PANGAEA.884782 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.884782 https://doi.org/10.5194/tc-12-2461-2018 |
_version_ |
1766377822454022144 |