Hot rocks in a cold place: high sub-glacial heat flow in East Antarctica

Autor:	Donald D. Blankenship, Jason L. Roberts, Sandra McLaren, CJ Carson, Steven D. Boger
Rok vydání:	2013
Předmět:	geography geography.geographical_feature_category Ice stream Antarctic ice sheet Geology Antarctic sea ice Geophysics Ice-sheet model Sea ice growth processes Sea ice Cryosphere Ice sheet Petrology
Zdroj:	Journal of the Geological Society. 171:9-12
ISSN:	2041-479X 0016-7649
DOI:	10.1144/jgs2013-030
Popis:	Numerical models are the primary predictive tools for understanding the dynamic behaviour of the Antarctic ice sheet. However, a key boundary parameter, sub-glacial heat flow, remains poorly constrained. We show that variations in abundance and distribution of heat-producing elements within the Antarctic continental crust result in greater and more variable regional sub-glacial heat flows than currently assumed in ice modelling studies. Such elevated heat flows would have a fundamental effect on ice sheet behaviour and highlight that geological controls on heat flow must be considered to obtain more accurate and refined predictions of ice mass balance and sea-level change. Supplementary materials: Heat flow and heat production definitions, heat production data, and details of the 2D model of the gross geometry of the continental lithosphere for a section through Prydz Bay are available at www.geolsoc.org.uk/SUP18690.
Databáze:	OpenAIRE
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