Increased ice flow in Western Palmer Land linked to ocean melting
A decrease in the mass and volume of Western Palmer Land has raised the prospect that ice speed has increased in this marine-based sector of Antarctica. To assess this possibility, we measure ice velocity over 25 years using satellite imagery and an optimized modeling approach. More than 30 unnamed...
Published in: | Geophysical Research Letters |
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Online Access: | https://hdl.handle.net/1983/e1c95eba-4425-4612-9501-23931da2fe33 https://research-information.bris.ac.uk/en/publications/e1c95eba-4425-4612-9501-23931da2fe33 https://doi.org/10.1002/2016GL072110 https://research-information.bris.ac.uk/ws/files/115557514/Full_text_PDF_final_published_version_.pdf |
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ftubristolcris:oai:research-information.bris.ac.uk:publications/e1c95eba-4425-4612-9501-23931da2fe33 2024-04-28T07:57:53+00:00 Increased ice flow in Western Palmer Land linked to ocean melting Hogg, Anna E. Shepherd, Andrew Cornford, Stephen L. Briggs, Kate H. Gourmelen, Noel Graham, Jennifer A. Joughin, Ian Mouginot, Jeremie Nagler, Thomas Payne, Antony J. Rignot, Eric Wuite, Jan 2017-05-16 application/pdf https://hdl.handle.net/1983/e1c95eba-4425-4612-9501-23931da2fe33 https://research-information.bris.ac.uk/en/publications/e1c95eba-4425-4612-9501-23931da2fe33 https://doi.org/10.1002/2016GL072110 https://research-information.bris.ac.uk/ws/files/115557514/Full_text_PDF_final_published_version_.pdf eng eng https://research-information.bris.ac.uk/en/publications/e1c95eba-4425-4612-9501-23931da2fe33 info:eu-repo/semantics/openAccess Hogg , A E , Shepherd , A , Cornford , S L , Briggs , K H , Gourmelen , N , Graham , J A , Joughin , I , Mouginot , J , Nagler , T , Payne , A J , Rignot , E & Wuite , J 2017 , ' Increased ice flow in Western Palmer Land linked to ocean melting ' , Geophysical Research Letters , vol. 44 , no. 9 , pp. 4159 - 4167 . https://doi.org/10.1002/2016GL072110 Antarctic Peninsula Dynamic imbalance Ice velocity Ocean warming article 2017 ftubristolcris https://doi.org/10.1002/2016GL072110 2024-04-10T00:01:20Z A decrease in the mass and volume of Western Palmer Land has raised the prospect that ice speed has increased in this marine-based sector of Antarctica. To assess this possibility, we measure ice velocity over 25 years using satellite imagery and an optimized modeling approach. More than 30 unnamed outlet glaciers drain the 800 km coastline of Western Palmer Land at speeds ranging from 0.5 to 2.5 m/d, interspersed with near-stagnant ice. Between 1992 and 2015, most of the outlet glaciers sped up by 0.2 to 0.3 m/d, leading to a 13% increase in ice flow and a 15 km 3 /yr increase in ice discharge across the sector as a whole. Speedup is greatest where glaciers are grounded more than 300 m below sea level, consistent with a loss of buttressing caused by ice shelf thinning in a region of shoaling warm circumpolar water. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Ice Shelf Palmer Land University of Bristol: Bristol Research Geophysical Research Letters 44 9 4159 4167 |
institution |
Open Polar |
collection |
University of Bristol: Bristol Research |
op_collection_id |
ftubristolcris |
language |
English |
topic |
Antarctic Peninsula Dynamic imbalance Ice velocity Ocean warming |
spellingShingle |
Antarctic Peninsula Dynamic imbalance Ice velocity Ocean warming Hogg, Anna E. Shepherd, Andrew Cornford, Stephen L. Briggs, Kate H. Gourmelen, Noel Graham, Jennifer A. Joughin, Ian Mouginot, Jeremie Nagler, Thomas Payne, Antony J. Rignot, Eric Wuite, Jan Increased ice flow in Western Palmer Land linked to ocean melting |
topic_facet |
Antarctic Peninsula Dynamic imbalance Ice velocity Ocean warming |
description |
A decrease in the mass and volume of Western Palmer Land has raised the prospect that ice speed has increased in this marine-based sector of Antarctica. To assess this possibility, we measure ice velocity over 25 years using satellite imagery and an optimized modeling approach. More than 30 unnamed outlet glaciers drain the 800 km coastline of Western Palmer Land at speeds ranging from 0.5 to 2.5 m/d, interspersed with near-stagnant ice. Between 1992 and 2015, most of the outlet glaciers sped up by 0.2 to 0.3 m/d, leading to a 13% increase in ice flow and a 15 km 3 /yr increase in ice discharge across the sector as a whole. Speedup is greatest where glaciers are grounded more than 300 m below sea level, consistent with a loss of buttressing caused by ice shelf thinning in a region of shoaling warm circumpolar water. |
format |
Article in Journal/Newspaper |
author |
Hogg, Anna E. Shepherd, Andrew Cornford, Stephen L. Briggs, Kate H. Gourmelen, Noel Graham, Jennifer A. Joughin, Ian Mouginot, Jeremie Nagler, Thomas Payne, Antony J. Rignot, Eric Wuite, Jan |
author_facet |
Hogg, Anna E. Shepherd, Andrew Cornford, Stephen L. Briggs, Kate H. Gourmelen, Noel Graham, Jennifer A. Joughin, Ian Mouginot, Jeremie Nagler, Thomas Payne, Antony J. Rignot, Eric Wuite, Jan |
author_sort |
Hogg, Anna E. |
title |
Increased ice flow in Western Palmer Land linked to ocean melting |
title_short |
Increased ice flow in Western Palmer Land linked to ocean melting |
title_full |
Increased ice flow in Western Palmer Land linked to ocean melting |
title_fullStr |
Increased ice flow in Western Palmer Land linked to ocean melting |
title_full_unstemmed |
Increased ice flow in Western Palmer Land linked to ocean melting |
title_sort |
increased ice flow in western palmer land linked to ocean melting |
publishDate |
2017 |
url |
https://hdl.handle.net/1983/e1c95eba-4425-4612-9501-23931da2fe33 https://research-information.bris.ac.uk/en/publications/e1c95eba-4425-4612-9501-23931da2fe33 https://doi.org/10.1002/2016GL072110 https://research-information.bris.ac.uk/ws/files/115557514/Full_text_PDF_final_published_version_.pdf |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Ice Shelf Palmer Land |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Ice Shelf Palmer Land |
op_source |
Hogg , A E , Shepherd , A , Cornford , S L , Briggs , K H , Gourmelen , N , Graham , J A , Joughin , I , Mouginot , J , Nagler , T , Payne , A J , Rignot , E & Wuite , J 2017 , ' Increased ice flow in Western Palmer Land linked to ocean melting ' , Geophysical Research Letters , vol. 44 , no. 9 , pp. 4159 - 4167 . https://doi.org/10.1002/2016GL072110 |
op_relation |
https://research-information.bris.ac.uk/en/publications/e1c95eba-4425-4612-9501-23931da2fe33 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1002/2016GL072110 |
container_title |
Geophysical Research Letters |
container_volume |
44 |
container_issue |
9 |
container_start_page |
4159 |
op_container_end_page |
4167 |
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1797590788086956032 |