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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
Abstract
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.
Metadata
Authors/Creators: |
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Keywords: | geomorphology; glacial debris; glacier dynamics; holocene; ice retreat; moraine; sediment transport; sedimentology; topography |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Environment (Leeds) > School of Geography (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 16 Jan 2015 11:24 |
Last Modified: | 16 Jan 2015 11:24 |
Published Version: | http://dx.doi.org/10.3189/2012JoG11J148 |
Status: | Published |
Publisher: | International Glaciological Society |
Identification Number: | https://doi.org/10.3189/2012JoG11J148 |
Related URLs: |
Available Versions of this Item
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Late-Holocene changes in character and behaviour of land-terminating glaciers on James Ross Island, Antarctica. (deposited 30 Jul 2013 09:46)
- Late-Holocene changes in character and behaviour of land-terminating glaciers on James Ross Island, Antarctica. (deposited 16 Jan 2015 11:24) [Currently Displayed]