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Heat and groundwater transport between the Antarctic Ice Sheet and subglacial sedimentary basins from electromagnetic geophysical measurements
conference contribution
posted on 2023-05-23, 14:47 authored by Kulessa, B, Key, K, Sarah ThompsonSarah Thompson, Siegert, MNumerical 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.
History
Publication title
SEG Technical Program Expanded AbstractsPagination
4819-4823ISSN
1052-3812Department/School
Institute for Marine and Antarctic StudiesPublisher
Society of Exploration GeophysicistsPlace of publication
USAEvent title
SEG International Exposition and 89th Annual MeetingEvent Venue
San Antonio, USADate of Event (Start Date)
2019-09-15Date of Event (End Date)
2019-09-20Rights statement
Copyright 2019 SEGRepository Status
- Restricted