Late-Holocene changes in character and behaviour of land-terminating glaciers on James Ross Island, Antarctica
Virtually no information is available on the response of land-terminating Antarctic Peninsula glaciers to climate change on a centennial timescale. This paper analyses the topography, geomorphology and sedimentology of prominent moraines on James Ross Island, Antarctica, to determine geometric chang...
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International Glaciological Society
2012
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Online Access: | https://eprints.whiterose.ac.uk/76108/ https://doi.org/10.3189/2012JoG11J148 |
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ftleedsuniv:oai:eprints.whiterose.ac.uk:76108 2024-06-02T07:56:32+00:00 Late-Holocene changes in character and behaviour of land-terminating glaciers on James Ross Island, Antarctica Carrivick, JL Davies, BJ Glasser, NF Nyvlt, D Hambrey, MJ 2012 https://eprints.whiterose.ac.uk/76108/ https://doi.org/10.3189/2012JoG11J148 unknown International Glaciological Society Carrivick, JL, Davies, BJ, Glasser, NF et al. (2 more authors) (2012) Late-Holocene changes in character and behaviour of land-terminating glaciers on James Ross Island, Antarctica. Journal of Glaciology, 58 (212). 1176 - 1190. ISSN 0022-1430 Article NonPeerReviewed 2012 ftleedsuniv https://doi.org/10.3189/2012JoG11J148 2024-05-06T12:39:55Z Virtually no information is available on the response of land-terminating Antarctic Peninsula glaciers to climate change on a centennial timescale. This paper analyses the topography, geomorphology and sedimentology of prominent moraines on James Ross Island, Antarctica, to determine geometric changes and to interpret glacier behaviour. The moraines are very likely due to a late-Holocene phase of advance and featured (1) shearing and thrusting within the snout, (2) shearing and deformation of basal sediment, (3) more supraglacial debris than at present and (4) short distances of sediment transport. Retreat of ∼100m and thinning of 15-20m has produced a loss of 0.1km3 of ice. The pattern of surface lowering is asymmetric. These geometrical changes are suggested most simply to be due to a net negative mass balance caused by a drier climate. Comparisons of the moraines with the current glaciological surface structure of the glaciers permits speculation of a transition from a polythermal to a cold-based thermal regime. Small land-terminating glaciers in the northern Antarctic Peninsula region could be cooling despite a warming climate. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Antarctica Journal James Ross Island Journal of Glaciology Ross Island White Rose Research Online (Universities of Leeds, Sheffield & York) Antarctic Antarctic Peninsula Ross Island Journal of Glaciology 58 212 1176 1190 |
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Open Polar |
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White Rose Research Online (Universities of Leeds, Sheffield & York) |
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ftleedsuniv |
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unknown |
description |
Virtually no information is available on the response of land-terminating Antarctic Peninsula glaciers to climate change on a centennial timescale. This paper analyses the topography, geomorphology and sedimentology of prominent moraines on James Ross Island, Antarctica, to determine geometric changes and to interpret glacier behaviour. The moraines are very likely due to a late-Holocene phase of advance and featured (1) shearing and thrusting within the snout, (2) shearing and deformation of basal sediment, (3) more supraglacial debris than at present and (4) short distances of sediment transport. Retreat of ∼100m and thinning of 15-20m has produced a loss of 0.1km3 of ice. The pattern of surface lowering is asymmetric. These geometrical changes are suggested most simply to be due to a net negative mass balance caused by a drier climate. Comparisons of the moraines with the current glaciological surface structure of the glaciers permits speculation of a transition from a polythermal to a cold-based thermal regime. Small land-terminating glaciers in the northern Antarctic Peninsula region could be cooling despite a warming climate. |
format |
Article in Journal/Newspaper |
author |
Carrivick, JL Davies, BJ Glasser, NF Nyvlt, D Hambrey, MJ |
spellingShingle |
Carrivick, JL Davies, BJ Glasser, NF Nyvlt, D Hambrey, MJ Late-Holocene changes in character and behaviour of land-terminating glaciers on James Ross Island, Antarctica |
author_facet |
Carrivick, JL Davies, BJ Glasser, NF Nyvlt, D Hambrey, MJ |
author_sort |
Carrivick, JL |
title |
Late-Holocene changes in character and behaviour of land-terminating glaciers on James Ross Island, Antarctica |
title_short |
Late-Holocene changes in character and behaviour of land-terminating glaciers on James Ross Island, Antarctica |
title_full |
Late-Holocene changes in character and behaviour of land-terminating glaciers on James Ross Island, Antarctica |
title_fullStr |
Late-Holocene changes in character and behaviour of land-terminating glaciers on James Ross Island, Antarctica |
title_full_unstemmed |
Late-Holocene changes in character and behaviour of land-terminating glaciers on James Ross Island, Antarctica |
title_sort |
late-holocene changes in character and behaviour of land-terminating glaciers on james ross island, antarctica |
publisher |
International Glaciological Society |
publishDate |
2012 |
url |
https://eprints.whiterose.ac.uk/76108/ https://doi.org/10.3189/2012JoG11J148 |
geographic |
Antarctic Antarctic Peninsula Ross Island |
geographic_facet |
Antarctic Antarctic Peninsula Ross Island |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Antarctica Journal James Ross Island Journal of Glaciology Ross Island |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Antarctica Journal James Ross Island Journal of Glaciology Ross Island |
op_relation |
Carrivick, JL, Davies, BJ, Glasser, NF et al. (2 more authors) (2012) Late-Holocene changes in character and behaviour of land-terminating glaciers on James Ross Island, Antarctica. Journal of Glaciology, 58 (212). 1176 - 1190. ISSN 0022-1430 |
op_doi |
https://doi.org/10.3189/2012JoG11J148 |
container_title |
Journal of Glaciology |
container_volume |
58 |
container_issue |
212 |
container_start_page |
1176 |
op_container_end_page |
1190 |
_version_ |
1800756803335618560 |