Exploring the current and future stability of the Antarctic Ice Sheet ...
<!--!introduction!--> Observations of ocean-driven grounding line retreat in the Amundsen Sea Embayment in Antarctica raise the question of an imminent collapse of the West Antarctic Ice Sheet. Here we analyse (1) whether the Antarctic grounding lines are undergoing a Marine Ice Sheet Instabil...
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GFZ German Research Centre for Geosciences
2023
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ftdatacite:10.57757/iugg23-4012 2023-07-23T04:13:20+02:00 Exploring the current and future stability of the Antarctic Ice Sheet ... Reese, Ronja Garbe, Julius Hill, Emily A. Urruty, Benoit Naughten, Kaitlin A. Gagliardini, Olivier Durand, Gael Gillet-Chaulet, Fabien Gudmundsson, G. Hilmar Chandler, David Langebroek, Petra M. Winkelmann, Ricarda 2023 https://dx.doi.org/10.57757/iugg23-4012 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5019839 unknown GFZ German Research Centre for Geosciences Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 Article ConferencePaper Oral 2023 ftdatacite https://doi.org/10.57757/iugg23-4012 2023-07-03T21:58:52Z <!--!introduction!--> Observations of ocean-driven grounding line retreat in the Amundsen Sea Embayment in Antarctica raise the question of an imminent collapse of the West Antarctic Ice Sheet. Here we analyse (1) whether the Antarctic grounding lines are undergoing a Marine Ice Sheet Instability in their current position and (2) the committed evolution of Antarctic grounding lines under the present-day ocean and atmospheric conditions. To this aim, we first calibrate a sub-shelf melt parameterisation, that is derived from an ocean box model, with observed and modelled melt sensitivities to ocean temperature changes, making it suitable for present-day simulations and future sea-level projections. Using the new calibration, we conduct a systematic numerical stability analysis of all the grounding lines of the Antarctic Ice Sheet to determine if they are currently undergoing irreversible retreat. In a second step, we run an ensemble of historical simulations from 1850 to 2015 to create model instances of ... : The 28th IUGG General Assembly (IUGG2023) (Berlin 2023) ... Conference Object Amundsen Sea Antarc* Antarctic Antarctica Ice Sheet DataCite Metadata Store (German National Library of Science and Technology) Antarctic The Antarctic Amundsen Sea West Antarctic Ice Sheet |
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DataCite Metadata Store (German National Library of Science and Technology) |
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description |
<!--!introduction!--> Observations of ocean-driven grounding line retreat in the Amundsen Sea Embayment in Antarctica raise the question of an imminent collapse of the West Antarctic Ice Sheet. Here we analyse (1) whether the Antarctic grounding lines are undergoing a Marine Ice Sheet Instability in their current position and (2) the committed evolution of Antarctic grounding lines under the present-day ocean and atmospheric conditions. To this aim, we first calibrate a sub-shelf melt parameterisation, that is derived from an ocean box model, with observed and modelled melt sensitivities to ocean temperature changes, making it suitable for present-day simulations and future sea-level projections. Using the new calibration, we conduct a systematic numerical stability analysis of all the grounding lines of the Antarctic Ice Sheet to determine if they are currently undergoing irreversible retreat. In a second step, we run an ensemble of historical simulations from 1850 to 2015 to create model instances of ... : The 28th IUGG General Assembly (IUGG2023) (Berlin 2023) ... |
format |
Conference Object |
author |
Reese, Ronja Garbe, Julius Hill, Emily A. Urruty, Benoit Naughten, Kaitlin A. Gagliardini, Olivier Durand, Gael Gillet-Chaulet, Fabien Gudmundsson, G. Hilmar Chandler, David Langebroek, Petra M. Winkelmann, Ricarda |
spellingShingle |
Reese, Ronja Garbe, Julius Hill, Emily A. Urruty, Benoit Naughten, Kaitlin A. Gagliardini, Olivier Durand, Gael Gillet-Chaulet, Fabien Gudmundsson, G. Hilmar Chandler, David Langebroek, Petra M. Winkelmann, Ricarda Exploring the current and future stability of the Antarctic Ice Sheet ... |
author_facet |
Reese, Ronja Garbe, Julius Hill, Emily A. Urruty, Benoit Naughten, Kaitlin A. Gagliardini, Olivier Durand, Gael Gillet-Chaulet, Fabien Gudmundsson, G. Hilmar Chandler, David Langebroek, Petra M. Winkelmann, Ricarda |
author_sort |
Reese, Ronja |
title |
Exploring the current and future stability of the Antarctic Ice Sheet ... |
title_short |
Exploring the current and future stability of the Antarctic Ice Sheet ... |
title_full |
Exploring the current and future stability of the Antarctic Ice Sheet ... |
title_fullStr |
Exploring the current and future stability of the Antarctic Ice Sheet ... |
title_full_unstemmed |
Exploring the current and future stability of the Antarctic Ice Sheet ... |
title_sort |
exploring the current and future stability of the antarctic ice sheet ... |
publisher |
GFZ German Research Centre for Geosciences |
publishDate |
2023 |
url |
https://dx.doi.org/10.57757/iugg23-4012 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5019839 |
geographic |
Antarctic The Antarctic Amundsen Sea West Antarctic Ice Sheet |
geographic_facet |
Antarctic The Antarctic Amundsen Sea West Antarctic Ice Sheet |
genre |
Amundsen Sea Antarc* Antarctic Antarctica Ice Sheet |
genre_facet |
Amundsen Sea Antarc* Antarctic Antarctica Ice Sheet |
op_rights |
Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 |
op_doi |
https://doi.org/10.57757/iugg23-4012 |
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1772178149923094528 |