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Retreat of Thwaites Glacier Triggered by its Neighbours

Matt Trevers Orcid Logo, Stephen Cornford Orcid Logo, Antony J Payne, Edward Gasson, Suzanne Bevan Orcid Logo

ESS Open Archive

Swansea University Authors: Stephen Cornford Orcid Logo, Suzanne Bevan Orcid Logo

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DOI (Published version): 10.22541/essoar.170957499.97583808/v1

Abstract

The Amundsen Sea Embayment in West Antarctica is experiencing the most rapid mass loss and grounding line retreat in Antarctica. Its glaciers are vulnerable to retreat through marine ice sheet instability. There is uncertainty over the timing and magnitude of retreat and in particular the response o...

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Published in: ESS Open Archive
Published: Authorea, Inc.
URI: https://cronfa.swan.ac.uk/Record/cronfa66288
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first_indexed 2024-05-03T10:06:31Z
last_indexed 2024-05-03T10:06:31Z
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spelling v2 66288 2024-05-03 Retreat of Thwaites Glacier Triggered by its Neighbours 17ae00ff2346b8c23d7e2b34341610a4 0000-0003-1844-274X Stephen Cornford Stephen Cornford true false 758d19253522c8c306d4eea0e6e484f6 0000-0003-2649-2982 Suzanne Bevan Suzanne Bevan true false 2024-05-03 BGPS The Amundsen Sea Embayment in West Antarctica is experiencing the most rapid mass loss and grounding line retreat in Antarctica. Its glaciers are vulnerable to retreat through marine ice sheet instability. There is uncertainty over the timing and magnitude of retreat and in particular the response of Thwaites Glacier to thinning of its ice shelf and to ocean forced retreat of its neighbouring glaciers. We find that the response of Thwaites to melting of its ice shelf is limited. However, retreat of its neighbours can drive substantial retreat in Thwaites. We examine the impact of ice shelf buttressing on the stability of the grounding line. Further experiments show that extreme ice shelf forcings are required to trigger retreat in Thwaites in isolation. We also demonstrate that long-term stability is sensitive to the treatment of basal stress near the grounding line. Journal Article ESS Open Archive Authorea, Inc. 0 0 0 0001-01-01 10.22541/essoar.170957499.97583808/v1 Preprint article before certification by peer review. COLLEGE NANME Biosciences Geography and Physics School COLLEGE CODE BGPS Swansea University This research was carried out as part of the NSFGEO-NERC Pliocenesea level amplitudes (PLIOAMP) project (NE/T007397/1). MT was also partly funded by the UK NERC Centre for Polar Observation and Modelling (CPOM). 2024-06-27T15:47:11.8099376 2024-05-03T11:02:31.3780747 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Geography Matt Trevers 0000-0003-4199-3945 1 Stephen Cornford 0000-0003-1844-274X 2 Antony J Payne 3 Edward Gasson 4 Suzanne Bevan 0000-0003-2649-2982 5
title Retreat of Thwaites Glacier Triggered by its Neighbours
spellingShingle Retreat of Thwaites Glacier Triggered by its Neighbours
Stephen Cornford
Suzanne Bevan
title_short Retreat of Thwaites Glacier Triggered by its Neighbours
title_full Retreat of Thwaites Glacier Triggered by its Neighbours
title_fullStr Retreat of Thwaites Glacier Triggered by its Neighbours
title_full_unstemmed Retreat of Thwaites Glacier Triggered by its Neighbours
title_sort Retreat of Thwaites Glacier Triggered by its Neighbours
author_id_str_mv 17ae00ff2346b8c23d7e2b34341610a4
758d19253522c8c306d4eea0e6e484f6
author_id_fullname_str_mv 17ae00ff2346b8c23d7e2b34341610a4_***_Stephen Cornford
758d19253522c8c306d4eea0e6e484f6_***_Suzanne Bevan
author Stephen Cornford
Suzanne Bevan
author2 Matt Trevers
Stephen Cornford
Antony J Payne
Edward Gasson
Suzanne Bevan
format Journal article
container_title ESS Open Archive
institution Swansea University
doi_str_mv 10.22541/essoar.170957499.97583808/v1
publisher Authorea, Inc.
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Biosciences, Geography and Physics - Geography{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Biosciences, Geography and Physics - Geography
document_store_str 0
active_str 0
description The Amundsen Sea Embayment in West Antarctica is experiencing the most rapid mass loss and grounding line retreat in Antarctica. Its glaciers are vulnerable to retreat through marine ice sheet instability. There is uncertainty over the timing and magnitude of retreat and in particular the response of Thwaites Glacier to thinning of its ice shelf and to ocean forced retreat of its neighbouring glaciers. We find that the response of Thwaites to melting of its ice shelf is limited. However, retreat of its neighbours can drive substantial retreat in Thwaites. We examine the impact of ice shelf buttressing on the stability of the grounding line. Further experiments show that extreme ice shelf forcings are required to trigger retreat in Thwaites in isolation. We also demonstrate that long-term stability is sensitive to the treatment of basal stress near the grounding line.
published_date 0001-01-01T15:47:11Z
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score 11.013148

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