The triggers of the disaggregation of Voyeykov Ice Shelf (2007), Wilkes Land, East Antarctica, and its subsequent evolution
The weakening and/or removal of floating ice shelves in Antarctica can induce inland ice flow acceleration. Numerical modelling suggests these processes will play an important role in Antarctica's future sea-level contribution, but our understanding of the mechanisms that lead to ice tongue/she...
Published in: | Journal of Glaciology |
---|---|
Main Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Cambridge University Press
2021
|
Subjects: | |
Online Access: | https://doi.org/10.1017/jog.2021.45 https://doaj.org/article/b22d24c7a3874b7a8224ca6dda6a8934 |
id |
ftdoajarticles:oai:doaj.org/article:b22d24c7a3874b7a8224ca6dda6a8934 |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:b22d24c7a3874b7a8224ca6dda6a8934 2023-05-15T13:47:11+02:00 The triggers of the disaggregation of Voyeykov Ice Shelf (2007), Wilkes Land, East Antarctica, and its subsequent evolution Jennifer F. Arthur Chris R. Stokes Stewart S. R. Jamieson Bertie W. J. Miles J. Rachel Carr Amber A. Leeson 2021-10-01T00:00:00Z https://doi.org/10.1017/jog.2021.45 https://doaj.org/article/b22d24c7a3874b7a8224ca6dda6a8934 EN eng Cambridge University Press https://www.cambridge.org/core/product/identifier/S0022143021000459/type/journal_article https://doaj.org/toc/0022-1430 https://doaj.org/toc/1727-5652 doi:10.1017/jog.2021.45 0022-1430 1727-5652 https://doaj.org/article/b22d24c7a3874b7a8224ca6dda6a8934 Journal of Glaciology, Vol 67, Pp 933-951 (2021) Ice/atmosphere interactions ice/ocean interactions ice-shelf break-up melt-surface sea-ice/ice-shelf interactions Environmental sciences GE1-350 Meteorology. Climatology QC851-999 article 2021 ftdoajarticles https://doi.org/10.1017/jog.2021.45 2023-03-12T01:30:57Z The weakening and/or removal of floating ice shelves in Antarctica can induce inland ice flow acceleration. Numerical modelling suggests these processes will play an important role in Antarctica's future sea-level contribution, but our understanding of the mechanisms that lead to ice tongue/shelf collapse is incomplete and largely based on observations from the Antarctic Peninsula and West Antarctica. Here, we use remote sensing of structural glaciology and ice velocity from 2001 to 2020 and analyse potential ocean-climate forcings to identify mechanisms that triggered the rapid disintegration of ~2445 km2 of ice mélange and part of the Voyeykov Ice Shelf in Wilkes Land, East Antarctica between 27 March and 28 May 2007. Results show disaggregation was pre-conditioned by weakening of the ice tongue's structural integrity and was triggered by mélange removal driven by a regional atmospheric circulation anomaly and a less extensive latent-heat polynya. Disaggregation did not induce inland ice flow acceleration, but our observations highlight an important mechanism through which floating termini can be removed, whereby the break-out of mélange and multiyear landfast sea ice triggers disaggregation of a structurally-weak ice shelf. These observations highlight the need for numerical ice-sheet models to account for interactions between sea-ice, mélange and ice shelves. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica East Antarctica Ice Sheet Ice Shelf Ice Shelves Journal of Glaciology Sea ice Voyeykov Ice Shelf West Antarctica Wilkes Land Directory of Open Access Journals: DOAJ Articles Antarctic Antarctic Peninsula East Antarctica The Antarctic Voyeykov Ice Shelf ENVELOPE(124.633,124.633,-66.333,-66.333) West Antarctica Wilkes Land ENVELOPE(120.000,120.000,-69.000,-69.000) Journal of Glaciology 67 265 933 951 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Ice/atmosphere interactions ice/ocean interactions ice-shelf break-up melt-surface sea-ice/ice-shelf interactions Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
spellingShingle |
Ice/atmosphere interactions ice/ocean interactions ice-shelf break-up melt-surface sea-ice/ice-shelf interactions Environmental sciences GE1-350 Meteorology. Climatology QC851-999 Jennifer F. Arthur Chris R. Stokes Stewart S. R. Jamieson Bertie W. J. Miles J. Rachel Carr Amber A. Leeson The triggers of the disaggregation of Voyeykov Ice Shelf (2007), Wilkes Land, East Antarctica, and its subsequent evolution |
topic_facet |
Ice/atmosphere interactions ice/ocean interactions ice-shelf break-up melt-surface sea-ice/ice-shelf interactions Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
description |
The weakening and/or removal of floating ice shelves in Antarctica can induce inland ice flow acceleration. Numerical modelling suggests these processes will play an important role in Antarctica's future sea-level contribution, but our understanding of the mechanisms that lead to ice tongue/shelf collapse is incomplete and largely based on observations from the Antarctic Peninsula and West Antarctica. Here, we use remote sensing of structural glaciology and ice velocity from 2001 to 2020 and analyse potential ocean-climate forcings to identify mechanisms that triggered the rapid disintegration of ~2445 km2 of ice mélange and part of the Voyeykov Ice Shelf in Wilkes Land, East Antarctica between 27 March and 28 May 2007. Results show disaggregation was pre-conditioned by weakening of the ice tongue's structural integrity and was triggered by mélange removal driven by a regional atmospheric circulation anomaly and a less extensive latent-heat polynya. Disaggregation did not induce inland ice flow acceleration, but our observations highlight an important mechanism through which floating termini can be removed, whereby the break-out of mélange and multiyear landfast sea ice triggers disaggregation of a structurally-weak ice shelf. These observations highlight the need for numerical ice-sheet models to account for interactions between sea-ice, mélange and ice shelves. |
format |
Article in Journal/Newspaper |
author |
Jennifer F. Arthur Chris R. Stokes Stewart S. R. Jamieson Bertie W. J. Miles J. Rachel Carr Amber A. Leeson |
author_facet |
Jennifer F. Arthur Chris R. Stokes Stewart S. R. Jamieson Bertie W. J. Miles J. Rachel Carr Amber A. Leeson |
author_sort |
Jennifer F. Arthur |
title |
The triggers of the disaggregation of Voyeykov Ice Shelf (2007), Wilkes Land, East Antarctica, and its subsequent evolution |
title_short |
The triggers of the disaggregation of Voyeykov Ice Shelf (2007), Wilkes Land, East Antarctica, and its subsequent evolution |
title_full |
The triggers of the disaggregation of Voyeykov Ice Shelf (2007), Wilkes Land, East Antarctica, and its subsequent evolution |
title_fullStr |
The triggers of the disaggregation of Voyeykov Ice Shelf (2007), Wilkes Land, East Antarctica, and its subsequent evolution |
title_full_unstemmed |
The triggers of the disaggregation of Voyeykov Ice Shelf (2007), Wilkes Land, East Antarctica, and its subsequent evolution |
title_sort |
triggers of the disaggregation of voyeykov ice shelf (2007), wilkes land, east antarctica, and its subsequent evolution |
publisher |
Cambridge University Press |
publishDate |
2021 |
url |
https://doi.org/10.1017/jog.2021.45 https://doaj.org/article/b22d24c7a3874b7a8224ca6dda6a8934 |
long_lat |
ENVELOPE(124.633,124.633,-66.333,-66.333) ENVELOPE(120.000,120.000,-69.000,-69.000) |
geographic |
Antarctic Antarctic Peninsula East Antarctica The Antarctic Voyeykov Ice Shelf West Antarctica Wilkes Land |
geographic_facet |
Antarctic Antarctic Peninsula East Antarctica The Antarctic Voyeykov Ice Shelf West Antarctica Wilkes Land |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica East Antarctica Ice Sheet Ice Shelf Ice Shelves Journal of Glaciology Sea ice Voyeykov Ice Shelf West Antarctica Wilkes Land |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica East Antarctica Ice Sheet Ice Shelf Ice Shelves Journal of Glaciology Sea ice Voyeykov Ice Shelf West Antarctica Wilkes Land |
op_source |
Journal of Glaciology, Vol 67, Pp 933-951 (2021) |
op_relation |
https://www.cambridge.org/core/product/identifier/S0022143021000459/type/journal_article https://doaj.org/toc/0022-1430 https://doaj.org/toc/1727-5652 doi:10.1017/jog.2021.45 0022-1430 1727-5652 https://doaj.org/article/b22d24c7a3874b7a8224ca6dda6a8934 |
op_doi |
https://doi.org/10.1017/jog.2021.45 |
container_title |
Journal of Glaciology |
container_volume |
67 |
container_issue |
265 |
container_start_page |
933 |
op_container_end_page |
951 |
_version_ |
1766246744136351744 |