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...
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Online Access: | https://doi.org/10.5194/tc-13-2771-2019 https://doaj.org/article/f88276ff47184b5a8cbf66f33acb0049 |
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ftdoajarticles:oai:doaj.org/article:f88276ff47184b5a8cbf66f33acb0049 2023-05-15T14:02:45+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 2019-10-01T00:00:00Z https://doi.org/10.5194/tc-13-2771-2019 https://doaj.org/article/f88276ff47184b5a8cbf66f33acb0049 EN eng Copernicus Publications https://www.the-cryosphere.net/13/2771/2019/tc-13-2771-2019.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 doi:10.5194/tc-13-2771-2019 1994-0416 1994-0424 https://doaj.org/article/f88276ff47184b5a8cbf66f33acb0049 The Cryosphere, Vol 13, Pp 2771-2787 (2019) Environmental sciences GE1-350 Geology QE1-996.5 article 2019 ftdoajarticles https://doi.org/10.5194/tc-13-2771-2019 2023-01-08T01:30:57Z 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 Directory of Open Access Journals: DOAJ Articles Antarctic The Antarctic East Antarctica Brunt Ice Shelf ENVELOPE(-22.500,-22.500,-74.750,-74.750) The Cryosphere 13 10 2771 2787 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental sciences GE1-350 Geology QE1-996.5 |
spellingShingle |
Environmental sciences GE1-350 Geology QE1-996.5 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 |
Environmental sciences GE1-350 Geology QE1-996.5 |
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://doaj.org/article/f88276ff47184b5a8cbf66f33acb0049 |
long_lat |
ENVELOPE(-22.500,-22.500,-74.750,-74.750) |
geographic |
Antarctic The Antarctic East Antarctica Brunt Ice Shelf |
geographic_facet |
Antarctic The Antarctic East Antarctica Brunt Ice Shelf |
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 |
https://www.the-cryosphere.net/13/2771/2019/tc-13-2771-2019.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 doi:10.5194/tc-13-2771-2019 1994-0416 1994-0424 https://doaj.org/article/f88276ff47184b5a8cbf66f33acb0049 |
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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1766273167382282240 |