Calving cycle of the Brunt Ice Shelf, Antarctica, driven by changes in ice shelf geometry
Despite the potentially detrimental impact of large-scale calving events on the geometry and ice flow of the Antarctic Ice Sheet, little is known about the processes that drive rift formation prior to calving, or what controls the timing of these events. The Brunt Ice Shelf in East Antarctica presen...
Published in: | The Cryosphere |
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Copernicus Publications
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Online Access: | https://doi.org/10.5194/tc-13-2771-2019 https://www.the-cryosphere.net/13/2771/2019/tc-13-2771-2019.pdf https://doaj.org/article/f88276ff47184b5a8cbf66f33acb0049 |
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fttriple:oai:gotriple.eu:oai:doaj.org/article:f88276ff47184b5a8cbf66f33acb0049 2023-05-15T13:32:56+02:00 Calving cycle of the Brunt Ice Shelf, Antarctica, driven by changes in ice shelf geometry J. De Rydt G. H. Gudmundsson T. Nagler J. Wuite 2019-10-01 https://doi.org/10.5194/tc-13-2771-2019 https://www.the-cryosphere.net/13/2771/2019/tc-13-2771-2019.pdf https://doaj.org/article/f88276ff47184b5a8cbf66f33acb0049 en eng Copernicus Publications doi:10.5194/tc-13-2771-2019 1994-0416 1994-0424 https://www.the-cryosphere.net/13/2771/2019/tc-13-2771-2019.pdf https://doaj.org/article/f88276ff47184b5a8cbf66f33acb0049 undefined The Cryosphere, Vol 13, Pp 2771-2787 (2019) geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2019 fttriple https://doi.org/10.5194/tc-13-2771-2019 2023-01-22T19:30:47Z Despite the potentially detrimental impact of large-scale calving events on the geometry and ice flow of the Antarctic Ice Sheet, little is known about the processes that drive rift formation prior to calving, or what controls the timing of these events. The Brunt Ice Shelf in East Antarctica presents a rare natural laboratory to study these processes, following the recent formation of two rifts, each now exceeding 50 km in length. Here we use 2 decades of in situ and remote sensing observations, together with numerical modelling, to reveal how slow changes in ice shelf geometry over time caused build-up of mechanical tension far upstream of the ice front, and culminated in rift formation and a significant speed-up of the ice shelf. These internal feedbacks, whereby ice shelves generate the very conditions that lead to their own (partial) disintegration, are currently missing from ice flow models, which severely limits their ability to accurately predict future sea level rise. Article in Journal/Newspaper Antarc* Antarctic Antarctica Brunt Ice Shelf East Antarctica Ice Sheet Ice Shelf Ice Shelves The Cryosphere Unknown Antarctic Brunt Ice Shelf ENVELOPE(-22.500,-22.500,-74.750,-74.750) East Antarctica The Antarctic The Cryosphere 13 10 2771 2787 |
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language |
English |
topic |
geo envir |
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geo envir J. De Rydt G. H. Gudmundsson T. Nagler J. Wuite Calving cycle of the Brunt Ice Shelf, Antarctica, driven by changes in ice shelf geometry |
topic_facet |
geo envir |
description |
Despite the potentially detrimental impact of large-scale calving events on the geometry and ice flow of the Antarctic Ice Sheet, little is known about the processes that drive rift formation prior to calving, or what controls the timing of these events. The Brunt Ice Shelf in East Antarctica presents a rare natural laboratory to study these processes, following the recent formation of two rifts, each now exceeding 50 km in length. Here we use 2 decades of in situ and remote sensing observations, together with numerical modelling, to reveal how slow changes in ice shelf geometry over time caused build-up of mechanical tension far upstream of the ice front, and culminated in rift formation and a significant speed-up of the ice shelf. These internal feedbacks, whereby ice shelves generate the very conditions that lead to their own (partial) disintegration, are currently missing from ice flow models, which severely limits their ability to accurately predict future sea level rise. |
format |
Article in Journal/Newspaper |
author |
J. De Rydt G. H. Gudmundsson T. Nagler J. Wuite |
author_facet |
J. De Rydt G. H. Gudmundsson T. Nagler J. Wuite |
author_sort |
J. De Rydt |
title |
Calving cycle of the Brunt Ice Shelf, Antarctica, driven by changes in ice shelf geometry |
title_short |
Calving cycle of the Brunt Ice Shelf, Antarctica, driven by changes in ice shelf geometry |
title_full |
Calving cycle of the Brunt Ice Shelf, Antarctica, driven by changes in ice shelf geometry |
title_fullStr |
Calving cycle of the Brunt Ice Shelf, Antarctica, driven by changes in ice shelf geometry |
title_full_unstemmed |
Calving cycle of the Brunt Ice Shelf, Antarctica, driven by changes in ice shelf geometry |
title_sort |
calving cycle of the brunt ice shelf, antarctica, driven by changes in ice shelf geometry |
publisher |
Copernicus Publications |
publishDate |
2019 |
url |
https://doi.org/10.5194/tc-13-2771-2019 https://www.the-cryosphere.net/13/2771/2019/tc-13-2771-2019.pdf https://doaj.org/article/f88276ff47184b5a8cbf66f33acb0049 |
long_lat |
ENVELOPE(-22.500,-22.500,-74.750,-74.750) |
geographic |
Antarctic Brunt Ice Shelf East Antarctica The Antarctic |
geographic_facet |
Antarctic Brunt Ice Shelf East Antarctica The Antarctic |
genre |
Antarc* Antarctic Antarctica Brunt Ice Shelf East Antarctica Ice Sheet Ice Shelf Ice Shelves The Cryosphere |
genre_facet |
Antarc* Antarctic Antarctica Brunt Ice Shelf East Antarctica Ice Sheet Ice Shelf Ice Shelves The Cryosphere |
op_source |
The Cryosphere, Vol 13, Pp 2771-2787 (2019) |
op_relation |
doi:10.5194/tc-13-2771-2019 1994-0416 1994-0424 https://www.the-cryosphere.net/13/2771/2019/tc-13-2771-2019.pdf https://doaj.org/article/f88276ff47184b5a8cbf66f33acb0049 |
op_rights |
undefined |
op_doi |
https://doi.org/10.5194/tc-13-2771-2019 |
container_title |
The Cryosphere |
container_volume |
13 |
container_issue |
10 |
container_start_page |
2771 |
op_container_end_page |
2787 |
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1766037032442789888 |