Trends in Antarctic Ice Sheet Elevation and Mass
Fluctuations in Antarctic Ice Sheet elevation and mass occur over a variety of time scales, owing to changes in snowfall and ice flow. Here we disentangle these signals by combining 25 years of satellite radar altimeter observations and a regional climate model. From these measurements, patterns of...
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American Geophysical Union
2019
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ftleedsuniv:oai:eprints.whiterose.ac.uk:149529 2023-05-15T13:34:43+02:00 Trends in Antarctic Ice Sheet Elevation and Mass Shepherd, A Gilbert, L Muir, AS Konrad, H McMillan, M Slater, T Briggs, KH Sundal, AV Hogg, AE Engdahl, ME 2019-08-12 text https://eprints.whiterose.ac.uk/149529/ https://eprints.whiterose.ac.uk/149529/7/Shepherd_et_al-2019-Geophysical_Research_Letters.pdf en eng American Geophysical Union https://eprints.whiterose.ac.uk/149529/7/Shepherd_et_al-2019-Geophysical_Research_Letters.pdf Shepherd, A orcid.org/0000-0002-4914-1299 , Gilbert, L, Muir, AS et al. (7 more authors) (2019) Trends in Antarctic Ice Sheet Elevation and Mass. Geophysical Research Letters, 46 (14). pp. 8174-8183. ISSN 0094-8276 cc_by_4 CC-BY Article NonPeerReviewed 2019 ftleedsuniv 2023-01-30T22:21:25Z Fluctuations in Antarctic Ice Sheet elevation and mass occur over a variety of time scales, owing to changes in snowfall and ice flow. Here we disentangle these signals by combining 25 years of satellite radar altimeter observations and a regional climate model. From these measurements, patterns of change that are strongly associated with glaciological events emerge. While the majority of the ice sheet has remained stable, 24% of West Antarctica is now in a state of dynamical imbalance. Thinning of the Pine Island and Thwaites glacier basins reaches 122 m in places, and their rates of ice loss are now five times greater than at the start of our survey. By partitioning elevation changes into areas of snow and ice variability, we estimate that East and West Antarctica have contributed −1.1 ± 0.4 and +5.7 ± 0.8 mm to global sea level between 1992 and 2017. Article in Journal/Newspaper Antarc* Antarctic Antarctica Ice Sheet Pine Island Thwaites Glacier West Antarctica White Rose Research Online (Universities of Leeds, Sheffield & York) Antarctic West Antarctica Thwaites Glacier ENVELOPE(-106.750,-106.750,-75.500,-75.500) |
institution |
Open Polar |
collection |
White Rose Research Online (Universities of Leeds, Sheffield & York) |
op_collection_id |
ftleedsuniv |
language |
English |
description |
Fluctuations in Antarctic Ice Sheet elevation and mass occur over a variety of time scales, owing to changes in snowfall and ice flow. Here we disentangle these signals by combining 25 years of satellite radar altimeter observations and a regional climate model. From these measurements, patterns of change that are strongly associated with glaciological events emerge. While the majority of the ice sheet has remained stable, 24% of West Antarctica is now in a state of dynamical imbalance. Thinning of the Pine Island and Thwaites glacier basins reaches 122 m in places, and their rates of ice loss are now five times greater than at the start of our survey. By partitioning elevation changes into areas of snow and ice variability, we estimate that East and West Antarctica have contributed −1.1 ± 0.4 and +5.7 ± 0.8 mm to global sea level between 1992 and 2017. |
format |
Article in Journal/Newspaper |
author |
Shepherd, A Gilbert, L Muir, AS Konrad, H McMillan, M Slater, T Briggs, KH Sundal, AV Hogg, AE Engdahl, ME |
spellingShingle |
Shepherd, A Gilbert, L Muir, AS Konrad, H McMillan, M Slater, T Briggs, KH Sundal, AV Hogg, AE Engdahl, ME Trends in Antarctic Ice Sheet Elevation and Mass |
author_facet |
Shepherd, A Gilbert, L Muir, AS Konrad, H McMillan, M Slater, T Briggs, KH Sundal, AV Hogg, AE Engdahl, ME |
author_sort |
Shepherd, A |
title |
Trends in Antarctic Ice Sheet Elevation and Mass |
title_short |
Trends in Antarctic Ice Sheet Elevation and Mass |
title_full |
Trends in Antarctic Ice Sheet Elevation and Mass |
title_fullStr |
Trends in Antarctic Ice Sheet Elevation and Mass |
title_full_unstemmed |
Trends in Antarctic Ice Sheet Elevation and Mass |
title_sort |
trends in antarctic ice sheet elevation and mass |
publisher |
American Geophysical Union |
publishDate |
2019 |
url |
https://eprints.whiterose.ac.uk/149529/ https://eprints.whiterose.ac.uk/149529/7/Shepherd_et_al-2019-Geophysical_Research_Letters.pdf |
long_lat |
ENVELOPE(-106.750,-106.750,-75.500,-75.500) |
geographic |
Antarctic West Antarctica Thwaites Glacier |
geographic_facet |
Antarctic West Antarctica Thwaites Glacier |
genre |
Antarc* Antarctic Antarctica Ice Sheet Pine Island Thwaites Glacier West Antarctica |
genre_facet |
Antarc* Antarctic Antarctica Ice Sheet Pine Island Thwaites Glacier West Antarctica |
op_relation |
https://eprints.whiterose.ac.uk/149529/7/Shepherd_et_al-2019-Geophysical_Research_Letters.pdf Shepherd, A orcid.org/0000-0002-4914-1299 , Gilbert, L, Muir, AS et al. (7 more authors) (2019) Trends in Antarctic Ice Sheet Elevation and Mass. Geophysical Research Letters, 46 (14). pp. 8174-8183. ISSN 0094-8276 |
op_rights |
cc_by_4 |
op_rightsnorm |
CC-BY |
_version_ |
1766056466986303488 |