Rapid Holocene thinning of an East Antarctic outlet glacier driven by marine ice sheet instability ...
Outlet glaciers grounded on a bed that deepens inland and extends below sea level are potentially vulnerable to ‘marine ice sheet instability’. This instability, which may lead to runaway ice loss, has been simulated in models, but its consequences have not been directly observed in geological recor...
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Online Access: | https://dx.doi.org/10.3929/ethz-b-000107979 http://hdl.handle.net/20.500.11850/107979 |
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ftdatacite:10.3929/ethz-b-000107979 2024-04-28T07:59:56+00:00 Rapid Holocene thinning of an East Antarctic outlet glacier driven by marine ice sheet instability ... Jones, R.S. Mackintosh, Andrew N. Norton, Kevin P. Golledge, Nicholas R. Fogwill, Chris J. Kubik, Peter W. Christl, Marcus Greenwood, Sarah L. 2015 application/pdf https://dx.doi.org/10.3929/ethz-b-000107979 http://hdl.handle.net/20.500.11850/107979 en eng ETH Zurich info:eu-repo/semantics/openAccess Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 article-journal Text ScholarlyArticle Journal Article 2015 ftdatacite https://doi.org/10.3929/ethz-b-000107979 2024-04-02T12:33:25Z Outlet glaciers grounded on a bed that deepens inland and extends below sea level are potentially vulnerable to ‘marine ice sheet instability’. This instability, which may lead to runaway ice loss, has been simulated in models, but its consequences have not been directly observed in geological records. Here we provide new surface-exposure ages from an outlet of the East Antarctic Ice Sheet that reveal rapid glacier thinning occurred approximately 7,000 years ago, in the absence of large environmental changes. Glacier thinning persisted for more than two and a half centuries, resulting in hundreds of metres of ice loss. Numerical simulations indicate that ice surface drawdown accelerated when the otherwise steadily retreating glacier encountered a bedrock trough. Together, the geological reconstruction and numerical simulations suggest that centennial-scale glacier thinning arose from unstable grounding line retreat. Capturing these instability processes in ice sheet models is important for predicting ... : Nature Communications, 6 ... Article in Journal/Newspaper Antarc* Antarctic Ice Sheet DataCite Metadata Store (German National Library of Science and Technology) |
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Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
description |
Outlet glaciers grounded on a bed that deepens inland and extends below sea level are potentially vulnerable to ‘marine ice sheet instability’. This instability, which may lead to runaway ice loss, has been simulated in models, but its consequences have not been directly observed in geological records. Here we provide new surface-exposure ages from an outlet of the East Antarctic Ice Sheet that reveal rapid glacier thinning occurred approximately 7,000 years ago, in the absence of large environmental changes. Glacier thinning persisted for more than two and a half centuries, resulting in hundreds of metres of ice loss. Numerical simulations indicate that ice surface drawdown accelerated when the otherwise steadily retreating glacier encountered a bedrock trough. Together, the geological reconstruction and numerical simulations suggest that centennial-scale glacier thinning arose from unstable grounding line retreat. Capturing these instability processes in ice sheet models is important for predicting ... : Nature Communications, 6 ... |
format |
Article in Journal/Newspaper |
author |
Jones, R.S. Mackintosh, Andrew N. Norton, Kevin P. Golledge, Nicholas R. Fogwill, Chris J. Kubik, Peter W. Christl, Marcus Greenwood, Sarah L. |
spellingShingle |
Jones, R.S. Mackintosh, Andrew N. Norton, Kevin P. Golledge, Nicholas R. Fogwill, Chris J. Kubik, Peter W. Christl, Marcus Greenwood, Sarah L. Rapid Holocene thinning of an East Antarctic outlet glacier driven by marine ice sheet instability ... |
author_facet |
Jones, R.S. Mackintosh, Andrew N. Norton, Kevin P. Golledge, Nicholas R. Fogwill, Chris J. Kubik, Peter W. Christl, Marcus Greenwood, Sarah L. |
author_sort |
Jones, R.S. |
title |
Rapid Holocene thinning of an East Antarctic outlet glacier driven by marine ice sheet instability ... |
title_short |
Rapid Holocene thinning of an East Antarctic outlet glacier driven by marine ice sheet instability ... |
title_full |
Rapid Holocene thinning of an East Antarctic outlet glacier driven by marine ice sheet instability ... |
title_fullStr |
Rapid Holocene thinning of an East Antarctic outlet glacier driven by marine ice sheet instability ... |
title_full_unstemmed |
Rapid Holocene thinning of an East Antarctic outlet glacier driven by marine ice sheet instability ... |
title_sort |
rapid holocene thinning of an east antarctic outlet glacier driven by marine ice sheet instability ... |
publisher |
ETH Zurich |
publishDate |
2015 |
url |
https://dx.doi.org/10.3929/ethz-b-000107979 http://hdl.handle.net/20.500.11850/107979 |
genre |
Antarc* Antarctic Ice Sheet |
genre_facet |
Antarc* Antarctic Ice Sheet |
op_rights |
info:eu-repo/semantics/openAccess Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 |
op_doi |
https://doi.org/10.3929/ethz-b-000107979 |
_version_ |
1797572401485053952 |