Antarctic Pacific sector ice-shelf height anomaly for 1994-2017 from satellite radar altimetry
Satellite observations over the past two decades have revealed increasing loss of grounded ice in West Antarctica, associated with floating ice shelves that have been thinning. Thinning reduces an ice shelf's ability to restrain grounded-ice discharge, yet our understanding of the climate proce...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.882376 2023-05-15T13:24:09+02:00 Antarctic Pacific sector ice-shelf height anomaly for 1994-2017 from satellite radar altimetry Paolo, Fernando S Fricker, Helen Padman, Laurie MEDIAN LATITUDE: -74.400000 * MEDIAN LONGITUDE: -116.750000 * SOUTH-BOUND LATITUDE: -74.400000 * WEST-BOUND LONGITUDE: -134.460000 * NORTH-BOUND LATITUDE: -74.400000 * EAST-BOUND LONGITUDE: -99.040000 2018-01-10 application/zip, 84.3 kBytes https://doi.pangaea.de/10.1594/PANGAEA.882376 https://doi.org/10.1594/PANGAEA.882376 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.882376 https://doi.org/10.1594/PANGAEA.882376 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Paolo, Fernando S; Padman, Laurie; Fricker, Helen; Adusumilli, S; Howard, S; Siegfried, M R (2018): Response of Pacific-sector Antarctic ice shelves to the El Niño/Southern Oscillation. Nature Geoscience, 11, 121-126, https://doi.org/10.1038/s41561-017-0033-0 Antarctica Antarctica_pacific RADAR Radar profile Dataset 2018 ftpangaea https://doi.org/10.1594/PANGAEA.882376 https://doi.org/10.1038/s41561-017-0033-0 2023-01-20T09:09:52Z Satellite observations over the past two decades have revealed increasing loss of grounded ice in West Antarctica, associated with floating ice shelves that have been thinning. Thinning reduces an ice shelf's ability to restrain grounded-ice discharge, yet our understanding of the climate processes that drive mass changes is limited. Here, we use ice-shelf height data from four satellite altimeter missions (1994-2017) to show a direct link between ice-shelf height variability in the Antarctic Pacific sector and changes in regional atmospheric circulation driven by the El Niño/Southern Oscillation. This link is strongest from the Dotson to Ross ice shelves and weaker elsewhere. During intense El Niño years, height increase by accumulation exceeds the height decrease by basal melting, but net ice-shelf mass declines as basal ice loss exceeds ice gain by lower-density snow. Our results demonstrate a substantial response of Amundsen Sea ice shelves to global and regional climate variability, with rates of change in height and mass on interannual timescales that can be comparable to the longer-term trend, and with mass changes from surface accumulation offsetting a significant fraction of the changes in basal melting. This implies that ice-shelf height and mass variability will increase as interannual atmospheric variability increases in a warming climate. Dataset Amundsen Sea Antarc* Antarctic Antarctica Ice Shelf Ice Shelves Sea ice West Antarctica PANGAEA - Data Publisher for Earth & Environmental Science Antarctic The Antarctic West Antarctica Amundsen Sea Pacific ENVELOPE(-134.460000,-99.040000,-74.400000,-74.400000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Antarctica Antarctica_pacific RADAR Radar profile |
spellingShingle |
Antarctica Antarctica_pacific RADAR Radar profile Paolo, Fernando S Fricker, Helen Padman, Laurie Antarctic Pacific sector ice-shelf height anomaly for 1994-2017 from satellite radar altimetry |
topic_facet |
Antarctica Antarctica_pacific RADAR Radar profile |
description |
Satellite observations over the past two decades have revealed increasing loss of grounded ice in West Antarctica, associated with floating ice shelves that have been thinning. Thinning reduces an ice shelf's ability to restrain grounded-ice discharge, yet our understanding of the climate processes that drive mass changes is limited. Here, we use ice-shelf height data from four satellite altimeter missions (1994-2017) to show a direct link between ice-shelf height variability in the Antarctic Pacific sector and changes in regional atmospheric circulation driven by the El Niño/Southern Oscillation. This link is strongest from the Dotson to Ross ice shelves and weaker elsewhere. During intense El Niño years, height increase by accumulation exceeds the height decrease by basal melting, but net ice-shelf mass declines as basal ice loss exceeds ice gain by lower-density snow. Our results demonstrate a substantial response of Amundsen Sea ice shelves to global and regional climate variability, with rates of change in height and mass on interannual timescales that can be comparable to the longer-term trend, and with mass changes from surface accumulation offsetting a significant fraction of the changes in basal melting. This implies that ice-shelf height and mass variability will increase as interannual atmospheric variability increases in a warming climate. |
format |
Dataset |
author |
Paolo, Fernando S Fricker, Helen Padman, Laurie |
author_facet |
Paolo, Fernando S Fricker, Helen Padman, Laurie |
author_sort |
Paolo, Fernando S |
title |
Antarctic Pacific sector ice-shelf height anomaly for 1994-2017 from satellite radar altimetry |
title_short |
Antarctic Pacific sector ice-shelf height anomaly for 1994-2017 from satellite radar altimetry |
title_full |
Antarctic Pacific sector ice-shelf height anomaly for 1994-2017 from satellite radar altimetry |
title_fullStr |
Antarctic Pacific sector ice-shelf height anomaly for 1994-2017 from satellite radar altimetry |
title_full_unstemmed |
Antarctic Pacific sector ice-shelf height anomaly for 1994-2017 from satellite radar altimetry |
title_sort |
antarctic pacific sector ice-shelf height anomaly for 1994-2017 from satellite radar altimetry |
publisher |
PANGAEA |
publishDate |
2018 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.882376 https://doi.org/10.1594/PANGAEA.882376 |
op_coverage |
MEDIAN LATITUDE: -74.400000 * MEDIAN LONGITUDE: -116.750000 * SOUTH-BOUND LATITUDE: -74.400000 * WEST-BOUND LONGITUDE: -134.460000 * NORTH-BOUND LATITUDE: -74.400000 * EAST-BOUND LONGITUDE: -99.040000 |
long_lat |
ENVELOPE(-134.460000,-99.040000,-74.400000,-74.400000) |
geographic |
Antarctic The Antarctic West Antarctica Amundsen Sea Pacific |
geographic_facet |
Antarctic The Antarctic West Antarctica Amundsen Sea Pacific |
genre |
Amundsen Sea Antarc* Antarctic Antarctica Ice Shelf Ice Shelves Sea ice West Antarctica |
genre_facet |
Amundsen Sea Antarc* Antarctic Antarctica Ice Shelf Ice Shelves Sea ice West Antarctica |
op_source |
Supplement to: Paolo, Fernando S; Padman, Laurie; Fricker, Helen; Adusumilli, S; Howard, S; Siegfried, M R (2018): Response of Pacific-sector Antarctic ice shelves to the El Niño/Southern Oscillation. Nature Geoscience, 11, 121-126, https://doi.org/10.1038/s41561-017-0033-0 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.882376 https://doi.org/10.1594/PANGAEA.882376 |
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.882376 https://doi.org/10.1038/s41561-017-0033-0 |
_version_ |
1766377720691818496 |