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Antarctic geothermal heat flow and its implications for tectonics and ice sheets

Citation

Reading, AM and Staal, T and Halpin, JA and Losing, M and Ebbing, J and Shen, W and McCormack, FS and Siddoway, CS and Hasterok, D, Antarctic geothermal heat flow and its implications for tectonics and ice sheets, Nature Reviews. Earth & Environment, 3 pp. 814-831. ISSN 2662-138X (2022) [Refereed Article]


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Springer Nature Limited 2022.

DOI: doi:10.1038/s43017-022-00348-y

Abstract

Geothermal heat flow (GHF) is an elusive physical property, yet it can reveal past and present plate tectonic processes. In Antarctica, GHF has further consequences in predicting the response of ice sheets to climate change. In this Review, we discuss variations in Antarctic GHF models based on geophysical methods and draw insights into tectonics and GHF model usage for ice sheet modelling. The inferred GHF at continental scale for West Antarctica (up to 119 mW m−2, 95th percentile) points to numerous contributing influences, including non-steady state neotectonic processes. Combined influences cause especially high values in the vicinity of the Thwaites Glacier, a location critical for the accurate prediction of accelerated loss of Antarctic ice mass. The inferred variations across East Antarctica are more subtle (up to 66 mW m−2, 95th percentile), where slightly elevated values in some locations correspond to the influence of thinned lithosphere and tectonic units with concentrations of heat-producing elements. Fine-scale anomalies owing to heat-producing elements and horizontal components of heat flow are important for regional modelling. GHF maps comprising central values with these fine-scale anomalies captured within uncertainty bounds can thus enable improved ensemble-based ice sheet model predictions of Antarctic ice loss.

Item Details

Item Type:Refereed Article
Keywords:geothermal heat flow, Antarctic, tectonics, ice sheets
Research Division:Earth Sciences
Research Group:Geophysics
Research Field:Geophysics not elsewhere classified
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the earth sciences
UTAS Author:Reading, AM (Professor Anya Reading)
UTAS Author:Staal, T (Dr Tobias Staal)
UTAS Author:Halpin, JA (Dr Jacqueline Halpin)
ID Code:154143
Year Published:2022
Funding Support:Australian Research Council (DP190100418)
Deposited By:Physics
Deposited On:2022-11-02
Last Modified:2023-01-10
Downloads:0

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