Low post-glacial rebound rates in the Weddell Sea due to Late Holocene ice-sheet readvance.
Many ice-sheet reconstructions assume monotonic Holocene retreat for the West Antarctic Ice Sheet, but an increasing number of glaciological observations infer that some portions of the ice sheet may be readvancing, following retreat behind the present-day margin. A readvance in the Weddell Sea regi...
Published in: | Earth and Planetary Science Letters |
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Online Access: | http://dro.dur.ac.uk/14189/ http://dro.dur.ac.uk/14189/1/14189.pdf http://dro.dur.ac.uk/14189/2/14189.pdf https://doi.org/10.1016/j.epsl.2014.12.039 |
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ftunivdurham:oai:dro.dur.ac.uk.OAI2:14189 2023-05-15T13:59:22+02:00 Low post-glacial rebound rates in the Weddell Sea due to Late Holocene ice-sheet readvance. Bradley, S.L. Hindmarsh, R.C.A. Whitehouse, P.L. Bentley, M.J. King, M.A. 2015-03-01 application/pdf http://dro.dur.ac.uk/14189/ http://dro.dur.ac.uk/14189/1/14189.pdf http://dro.dur.ac.uk/14189/2/14189.pdf https://doi.org/10.1016/j.epsl.2014.12.039 unknown Elsevier dro:14189 issn:0012-821X doi:10.1016/j.epsl.2014.12.039 http://dro.dur.ac.uk/14189/ http://dx.doi.org/10.1016/j.epsl.2014.12.039 http://dro.dur.ac.uk/14189/1/14189.pdf http://dro.dur.ac.uk/14189/2/14189.pdf © 2014 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) CC-BY-NC-ND Earth and planetary science letters, 2015, Vol.413, pp.79-89 [Peer Reviewed Journal] Grounding line stability Antarctic Ice sheet Glacial isostatic adjustment Uplift rate Weddell Sea Deglaciation Article PeerReviewed 2015 ftunivdurham https://doi.org/10.1016/j.epsl.2014.12.039 2020-05-28T22:31:47Z Many ice-sheet reconstructions assume monotonic Holocene retreat for the West Antarctic Ice Sheet, but an increasing number of glaciological observations infer that some portions of the ice sheet may be readvancing, following retreat behind the present-day margin. A readvance in the Weddell Sea region can reconcile two outstanding problems: (i) the present-day widespread occurrence of seemingly stable ice streams grounded on beds that deepen inland; and (ii) the inability of models of glacial isostatic adjustment to match present-day uplift rates. By combining a suite of ice loading histories that include a readvance with a model of glacial isostatic adjustment we report substantial improvements to predictions of present-day uplift rates, including reconciling one problematic observation of land sinking. We suggest retreat behind present grounding lines occurred when the bed was lower, and isostatic recovery has since led to shallowing, ice sheet re-grounding and readvance. The paradoxical existence of grounding lines in apparently unstable configurations on reverse bed slopes may be resolved by invoking the process of unstable advance, in accordance with our load modelling. Article in Journal/Newspaper Antarc* Antarctic Ice Sheet Weddell Sea Durham University: Durham Research Online Antarctic Weddell Weddell Sea West Antarctic Ice Sheet Earth and Planetary Science Letters 413 79 89 |
institution |
Open Polar |
collection |
Durham University: Durham Research Online |
op_collection_id |
ftunivdurham |
language |
unknown |
topic |
Grounding line stability Antarctic Ice sheet Glacial isostatic adjustment Uplift rate Weddell Sea Deglaciation |
spellingShingle |
Grounding line stability Antarctic Ice sheet Glacial isostatic adjustment Uplift rate Weddell Sea Deglaciation Bradley, S.L. Hindmarsh, R.C.A. Whitehouse, P.L. Bentley, M.J. King, M.A. Low post-glacial rebound rates in the Weddell Sea due to Late Holocene ice-sheet readvance. |
topic_facet |
Grounding line stability Antarctic Ice sheet Glacial isostatic adjustment Uplift rate Weddell Sea Deglaciation |
description |
Many ice-sheet reconstructions assume monotonic Holocene retreat for the West Antarctic Ice Sheet, but an increasing number of glaciological observations infer that some portions of the ice sheet may be readvancing, following retreat behind the present-day margin. A readvance in the Weddell Sea region can reconcile two outstanding problems: (i) the present-day widespread occurrence of seemingly stable ice streams grounded on beds that deepen inland; and (ii) the inability of models of glacial isostatic adjustment to match present-day uplift rates. By combining a suite of ice loading histories that include a readvance with a model of glacial isostatic adjustment we report substantial improvements to predictions of present-day uplift rates, including reconciling one problematic observation of land sinking. We suggest retreat behind present grounding lines occurred when the bed was lower, and isostatic recovery has since led to shallowing, ice sheet re-grounding and readvance. The paradoxical existence of grounding lines in apparently unstable configurations on reverse bed slopes may be resolved by invoking the process of unstable advance, in accordance with our load modelling. |
format |
Article in Journal/Newspaper |
author |
Bradley, S.L. Hindmarsh, R.C.A. Whitehouse, P.L. Bentley, M.J. King, M.A. |
author_facet |
Bradley, S.L. Hindmarsh, R.C.A. Whitehouse, P.L. Bentley, M.J. King, M.A. |
author_sort |
Bradley, S.L. |
title |
Low post-glacial rebound rates in the Weddell Sea due to Late Holocene ice-sheet readvance. |
title_short |
Low post-glacial rebound rates in the Weddell Sea due to Late Holocene ice-sheet readvance. |
title_full |
Low post-glacial rebound rates in the Weddell Sea due to Late Holocene ice-sheet readvance. |
title_fullStr |
Low post-glacial rebound rates in the Weddell Sea due to Late Holocene ice-sheet readvance. |
title_full_unstemmed |
Low post-glacial rebound rates in the Weddell Sea due to Late Holocene ice-sheet readvance. |
title_sort |
low post-glacial rebound rates in the weddell sea due to late holocene ice-sheet readvance. |
publisher |
Elsevier |
publishDate |
2015 |
url |
http://dro.dur.ac.uk/14189/ http://dro.dur.ac.uk/14189/1/14189.pdf http://dro.dur.ac.uk/14189/2/14189.pdf https://doi.org/10.1016/j.epsl.2014.12.039 |
geographic |
Antarctic Weddell Weddell Sea West Antarctic Ice Sheet |
geographic_facet |
Antarctic Weddell Weddell Sea West Antarctic Ice Sheet |
genre |
Antarc* Antarctic Ice Sheet Weddell Sea |
genre_facet |
Antarc* Antarctic Ice Sheet Weddell Sea |
op_source |
Earth and planetary science letters, 2015, Vol.413, pp.79-89 [Peer Reviewed Journal] |
op_relation |
dro:14189 issn:0012-821X doi:10.1016/j.epsl.2014.12.039 http://dro.dur.ac.uk/14189/ http://dx.doi.org/10.1016/j.epsl.2014.12.039 http://dro.dur.ac.uk/14189/1/14189.pdf http://dro.dur.ac.uk/14189/2/14189.pdf |
op_rights |
© 2014 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) |
op_rightsnorm |
CC-BY-NC-ND |
op_doi |
https://doi.org/10.1016/j.epsl.2014.12.039 |
container_title |
Earth and Planetary Science Letters |
container_volume |
413 |
container_start_page |
79 |
op_container_end_page |
89 |
_version_ |
1766267918856749056 |