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A topographic hinge...
A topographic hinge-zone divides coastal and inland ice dynamic regimes in East Antarctica
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- Lund Andersen, Jane, 1986- (author)
- Stockholms universitet,Institutionen för naturgeografi,Aarhus University, Denmark
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- Newall, Jennifer C. (author)
- Stockholms universitet,Institutionen för naturgeografi,Bolincentret för klimatforskning (tills m KTH & SMHI),Purdue University, USA
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Fredin, Ola (author)
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Glasser, Neil F. (author)
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Lifton, Nathaniel A. (author)
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Stuart, Finlay M. (author)
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Fabel, Derek (author)
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Caffee, Marc (author)
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Pedersen, Vivi K. (author)
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Koester, Alexandria J. (author)
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Suganuma, Yusuke (author)
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- Harbor, Jonathan M. (author)
- Stockholms universitet,Institutionen för naturgeografi,Purdue University, USA; Purdue Global, USA
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- Stroeven, Arjen P., 1963- (author)
- Stockholms universitet,Institutionen för naturgeografi,Bolincentret för klimatforskning (tills m KTH & SMHI)
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(creator_code:org_t)
- 2023-01-05
- 2023
- English.
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In: Communications Earth & Environment. - : Springer Science and Business Media LLC. - 2662-4435. ; 4
- Related links:
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
Subject headings
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- 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.
Subject headings
- NATURVETENSKAP -- Geovetenskap och miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences (hsv//eng)
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Lund Andersen, J ...
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Newall, Jennifer ...
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Fredin, Ola
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Glasser, Neil F.
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Lifton, Nathanie ...
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Stuart, Finlay M ...
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show more...
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Fabel, Derek
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Caffee, Marc
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Pedersen, Vivi K ...
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Koester, Alexand ...
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Suganuma, Yusuke
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Harbor, Jonathan ...
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Stroeven, Arjen ...
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- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Earth and Relate ...
- Articles in the publication
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Communications E ...
- By the university
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Stockholm University