A topographic hinge-zone divides coastal and inland ice dynamic regimes in East Antarctica

The impact of late Cenozoic climate on the East Antarctic Ice Sheet is uncertain. Poorly constrained patterns of relative ice thinning and thickening impair the reconstruction of past ice-sheet dynamics and global sea-level budgets. Here we quantify long-term ice cover of mountains protruding the ic...

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Published in:Communications Earth & Environment
Main Authors: Andersen, Jane L., Newall, Jennifer C., Fredin, Ola, Glasser, Neil F., Lifton, Nathaniel A., Stuart, Finlay M., Fabel, Derek, Caffee, Marc, Pedersen, Vivi K., Koester, Alexandria J., Suganuma, Yusuke, Harbor, Jonathan M., Stroeven, Arjen P.
Format: Article in Journal/Newspaper
Language:English
Published: Nature Research 2023
Subjects:
Online Access:https://eprints.gla.ac.uk/289279/
https://eprints.gla.ac.uk/289279/1/289279.pdf
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spelling ftuglasgow:oai:eprints.gla.ac.uk:289279 2023-05-15T13:47:28+02:00 A topographic hinge-zone divides coastal and inland ice dynamic regimes in East Antarctica Andersen, Jane L. Newall, Jennifer C. Fredin, Ola Glasser, Neil F. Lifton, Nathaniel A. Stuart, Finlay M. Fabel, Derek Caffee, Marc Pedersen, Vivi K. Koester, Alexandria J. Suganuma, Yusuke Harbor, Jonathan M. Stroeven, Arjen P. 2023-01-05 text https://eprints.gla.ac.uk/289279/ https://eprints.gla.ac.uk/289279/1/289279.pdf en eng Nature Research https://eprints.gla.ac.uk/289279/1/289279.pdf Andersen, J. L. et al. (2023) A topographic hinge-zone divides coastal and inland ice dynamic regimes in East Antarctica. Communications Earth and Environment <https://eprints.gla.ac.uk/view/journal_volume/Communications_Earth_and_Environment.html>, 4(1), 9. (doi:10.1038/s43247-022-00673-6 <https://doi.org/10.1038/s43247-022-00673-6>) cc_by_4 CC-BY Articles PeerReviewed 2023 ftuglasgow https://doi.org/10.1038/s43247-022-00673-6 2023-01-12T23:09:32Z The impact of late Cenozoic climate on the East Antarctic Ice Sheet is uncertain. Poorly constrained patterns of relative ice thinning and thickening impair the reconstruction of past ice-sheet dynamics and global sea-level budgets. Here we quantify long-term ice cover of mountains protruding the ice-sheet surface in western Dronning Maud Land, using cosmogenic Chlorine-36, Aluminium-26, Beryllium-10, and Neon-21 from bedrock in an inverse modeling approach. We find that near-coastal sites experienced ice burial up to 75–97% of time since 1 Ma, while interior sites only experienced brief periods of ice burial, generally <20% of time since 1 Ma. Based on these results, we suggest that the escarpment in Dronning Maud Land acts as a hinge-zone, where ice-dynamic changes driven by grounding-line migration are attenuated inland from the coastal portions of the East Antarctic Ice Sheet, and where precipitation-controlled ice-thickness variations on the polar plateau taper off towards the coast. Article in Journal/Newspaper Antarc* Antarctic Antarctica Dronning Maud Land East Antarctica Ice Sheet University of Glasgow: Enlighten - Publications Antarctic Dronning Maud Land East Antarctic Ice Sheet East Antarctica Polar Plateau ENVELOPE(0.000,0.000,-90.000,-90.000) Communications Earth & Environment 4 1
institution Open Polar
collection University of Glasgow: Enlighten - Publications
op_collection_id ftuglasgow
language English
description The impact of late Cenozoic climate on the East Antarctic Ice Sheet is uncertain. Poorly constrained patterns of relative ice thinning and thickening impair the reconstruction of past ice-sheet dynamics and global sea-level budgets. Here we quantify long-term ice cover of mountains protruding the ice-sheet surface in western Dronning Maud Land, using cosmogenic Chlorine-36, Aluminium-26, Beryllium-10, and Neon-21 from bedrock in an inverse modeling approach. We find that near-coastal sites experienced ice burial up to 75–97% of time since 1 Ma, while interior sites only experienced brief periods of ice burial, generally <20% of time since 1 Ma. Based on these results, we suggest that the escarpment in Dronning Maud Land acts as a hinge-zone, where ice-dynamic changes driven by grounding-line migration are attenuated inland from the coastal portions of the East Antarctic Ice Sheet, and where precipitation-controlled ice-thickness variations on the polar plateau taper off towards the coast.
format Article in Journal/Newspaper
author Andersen, Jane L.
Newall, Jennifer C.
Fredin, Ola
Glasser, Neil F.
Lifton, Nathaniel A.
Stuart, Finlay M.
Fabel, Derek
Caffee, Marc
Pedersen, Vivi K.
Koester, Alexandria J.
Suganuma, Yusuke
Harbor, Jonathan M.
Stroeven, Arjen P.
spellingShingle Andersen, Jane L.
Newall, Jennifer C.
Fredin, Ola
Glasser, Neil F.
Lifton, Nathaniel A.
Stuart, Finlay M.
Fabel, Derek
Caffee, Marc
Pedersen, Vivi K.
Koester, Alexandria J.
Suganuma, Yusuke
Harbor, Jonathan M.
Stroeven, Arjen P.
A topographic hinge-zone divides coastal and inland ice dynamic regimes in East Antarctica
author_facet Andersen, Jane L.
Newall, Jennifer C.
Fredin, Ola
Glasser, Neil F.
Lifton, Nathaniel A.
Stuart, Finlay M.
Fabel, Derek
Caffee, Marc
Pedersen, Vivi K.
Koester, Alexandria J.
Suganuma, Yusuke
Harbor, Jonathan M.
Stroeven, Arjen P.
author_sort Andersen, Jane L.
title A topographic hinge-zone divides coastal and inland ice dynamic regimes in East Antarctica
title_short A topographic hinge-zone divides coastal and inland ice dynamic regimes in East Antarctica
title_full A topographic hinge-zone divides coastal and inland ice dynamic regimes in East Antarctica
title_fullStr A topographic hinge-zone divides coastal and inland ice dynamic regimes in East Antarctica
title_full_unstemmed A topographic hinge-zone divides coastal and inland ice dynamic regimes in East Antarctica
title_sort topographic hinge-zone divides coastal and inland ice dynamic regimes in east antarctica
publisher Nature Research
publishDate 2023
url https://eprints.gla.ac.uk/289279/
https://eprints.gla.ac.uk/289279/1/289279.pdf
long_lat ENVELOPE(0.000,0.000,-90.000,-90.000)
geographic Antarctic
Dronning Maud Land
East Antarctic Ice Sheet
East Antarctica
Polar Plateau
geographic_facet Antarctic
Dronning Maud Land
East Antarctic Ice Sheet
East Antarctica
Polar Plateau
genre Antarc*
Antarctic
Antarctica
Dronning Maud Land
East Antarctica
Ice Sheet
genre_facet Antarc*
Antarctic
Antarctica
Dronning Maud Land
East Antarctica
Ice Sheet
op_relation https://eprints.gla.ac.uk/289279/1/289279.pdf
Andersen, J. L. et al. (2023) A topographic hinge-zone divides coastal and inland ice dynamic regimes in East Antarctica. Communications Earth and Environment <https://eprints.gla.ac.uk/view/journal_volume/Communications_Earth_and_Environment.html>, 4(1), 9. (doi:10.1038/s43247-022-00673-6 <https://doi.org/10.1038/s43247-022-00673-6>)
op_rights cc_by_4
op_rightsnorm CC-BY
op_doi https://doi.org/10.1038/s43247-022-00673-6
container_title Communications Earth & Environment
container_volume 4
container_issue 1
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