Widespread increase in dynamic imbalance in the Getz region of Antarctica from 1994 to 2018
The Getz region of West Antarctica is losing ice at an increasing rate; however, the forcing mechanisms remain unclear. Here we use satellite observations and an ice sheet model to measure the change in ice speed and mass balance of the drainage basin over the last 25-years. Our results show a mean...
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ftleedsuniv:oai:eprints.whiterose.ac.uk:172067 2023-05-15T13:37:09+02:00 Widespread increase in dynamic imbalance in the Getz region of Antarctica from 1994 to 2018 Selley, HL Hogg, AE Cornford, S Dutrieux, P Shepherd, A Wuite, J Floricioiu, D Kusk, A Nagler, T Gilbert, L Slater, T Kim, T-W 2021-02-23 text https://eprints.whiterose.ac.uk/172067/ https://eprints.whiterose.ac.uk/172067/1/selley%20et%20al%202021.pdf en eng Nature Research https://eprints.whiterose.ac.uk/172067/1/selley%20et%20al%202021.pdf Selley, HL orcid.org/0000-0002-0793-8144 , Hogg, AE orcid.org/0000-0002-6441-4937 , Cornford, S et al. (9 more authors) (2021) Widespread increase in dynamic imbalance in the Getz region of Antarctica from 1994 to 2018. Nature Communications, 12 (1). 1133. ISSN 2041-1723 cc_by_4 CC-BY Article NonPeerReviewed 2021 ftleedsuniv 2023-01-30T22:37:13Z The Getz region of West Antarctica is losing ice at an increasing rate; however, the forcing mechanisms remain unclear. Here we use satellite observations and an ice sheet model to measure the change in ice speed and mass balance of the drainage basin over the last 25-years. Our results show a mean increase in speed of 23.8 % between 1994 and 2018, with three glaciers accelerating by over 44 %. Speedup across the Getz basin is linear, with speedup and thinning directly correlated confirming the presence of dynamic imbalance. Since 1994, 315 Gt of ice has been lost contributing 0.9 ± 0.6 mm global mean sea level, with increased loss since 2010 caused by a snowfall reduction. Overall, dynamic imbalance accounts for two thirds of the mass loss from this region of West Antarctica over the past 25-years, with a longer-term response to ocean forcing the likely driving mechanism. Article in Journal/Newspaper Antarc* Antarctica Ice Sheet West Antarctica White Rose Research Online (Universities of Leeds, Sheffield & York) West Antarctica Getz ENVELOPE(-145.217,-145.217,-76.550,-76.550) |
institution |
Open Polar |
collection |
White Rose Research Online (Universities of Leeds, Sheffield & York) |
op_collection_id |
ftleedsuniv |
language |
English |
description |
The Getz region of West Antarctica is losing ice at an increasing rate; however, the forcing mechanisms remain unclear. Here we use satellite observations and an ice sheet model to measure the change in ice speed and mass balance of the drainage basin over the last 25-years. Our results show a mean increase in speed of 23.8 % between 1994 and 2018, with three glaciers accelerating by over 44 %. Speedup across the Getz basin is linear, with speedup and thinning directly correlated confirming the presence of dynamic imbalance. Since 1994, 315 Gt of ice has been lost contributing 0.9 ± 0.6 mm global mean sea level, with increased loss since 2010 caused by a snowfall reduction. Overall, dynamic imbalance accounts for two thirds of the mass loss from this region of West Antarctica over the past 25-years, with a longer-term response to ocean forcing the likely driving mechanism. |
format |
Article in Journal/Newspaper |
author |
Selley, HL Hogg, AE Cornford, S Dutrieux, P Shepherd, A Wuite, J Floricioiu, D Kusk, A Nagler, T Gilbert, L Slater, T Kim, T-W |
spellingShingle |
Selley, HL Hogg, AE Cornford, S Dutrieux, P Shepherd, A Wuite, J Floricioiu, D Kusk, A Nagler, T Gilbert, L Slater, T Kim, T-W Widespread increase in dynamic imbalance in the Getz region of Antarctica from 1994 to 2018 |
author_facet |
Selley, HL Hogg, AE Cornford, S Dutrieux, P Shepherd, A Wuite, J Floricioiu, D Kusk, A Nagler, T Gilbert, L Slater, T Kim, T-W |
author_sort |
Selley, HL |
title |
Widespread increase in dynamic imbalance in the Getz region of Antarctica from 1994 to 2018 |
title_short |
Widespread increase in dynamic imbalance in the Getz region of Antarctica from 1994 to 2018 |
title_full |
Widespread increase in dynamic imbalance in the Getz region of Antarctica from 1994 to 2018 |
title_fullStr |
Widespread increase in dynamic imbalance in the Getz region of Antarctica from 1994 to 2018 |
title_full_unstemmed |
Widespread increase in dynamic imbalance in the Getz region of Antarctica from 1994 to 2018 |
title_sort |
widespread increase in dynamic imbalance in the getz region of antarctica from 1994 to 2018 |
publisher |
Nature Research |
publishDate |
2021 |
url |
https://eprints.whiterose.ac.uk/172067/ https://eprints.whiterose.ac.uk/172067/1/selley%20et%20al%202021.pdf |
long_lat |
ENVELOPE(-145.217,-145.217,-76.550,-76.550) |
geographic |
West Antarctica Getz |
geographic_facet |
West Antarctica Getz |
genre |
Antarc* Antarctica Ice Sheet West Antarctica |
genre_facet |
Antarc* Antarctica Ice Sheet West Antarctica |
op_relation |
https://eprints.whiterose.ac.uk/172067/1/selley%20et%20al%202021.pdf Selley, HL orcid.org/0000-0002-0793-8144 , Hogg, AE orcid.org/0000-0002-6441-4937 , Cornford, S et al. (9 more authors) (2021) Widespread increase in dynamic imbalance in the Getz region of Antarctica from 1994 to 2018. Nature Communications, 12 (1). 1133. ISSN 2041-1723 |
op_rights |
cc_by_4 |
op_rightsnorm |
CC-BY |
_version_ |
1766088643503456256 |