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Heat and groundwater transport between the Antarctic Ice Sheet and subglacial sedimentary basins from electromagnetic geophysical measurements

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Kulessa, B, Key, K, Thompson, S ORCID: 0000-0001-9112-6933 and Siegert, M 2019 , 'Heat and groundwater transport between the Antarctic Ice Sheet and subglacial sedimentary basins from electromagnetic geophysical measurements', in SEG Technical Program Expanded Abstracts , Society of Exploration Geophysicists, USA, pp. 4819-4823 , doi: 10.1190/segam2019-3215566.1.

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Abstract

Numerical models of contemporary as well as paleo-ice sheets suggest that groundwater and heat exchanges between subglacial sedimentary basins and the ice sheet above, can be substantial and influence the flow of ice above. So far, an approach for the measurement and assessment of such heat fluxes has not been available. Here, we summarise existing evidence for groundwater and heat exchanges between contemporary and paleo ice sheets and the substrate below. We then explain the utility of electromagnetic geophysical measurements in elucidating such exchanges, and present magnetotelluric synthetic models of the deep sedimentary basin beneath the Institute Ice Stream in West Antarctica by way of illustration. Finally, we propose a simple empirical model by which heat exchanges between subglacial sedimentary basins and the overlying ice sheet can be estimated to first-order from electromagnetic data.

Item Type: Conference Publication
Authors/Creators:Kulessa, B and Key, K and Thompson, S and Siegert, M
Keywords: Antarctica, ground heat transport, sedimentary basins
Journal or Publication Title: SEG Technical Program Expanded Abstracts
Publisher: Society of Exploration Geophysicists
ISSN: 1052-3812
DOI / ID Number: 10.1190/segam2019-3215566.1
Copyright Information:

Copyright 2019 SEG

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