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Combining interpolated and locally observed contributions to heat flow models


Reading, A and Staal, T and Halpin, J and Whittaker, J, Combining interpolated and locally observed contributions to heat flow models, TACtical Workshop Abstracts, 21-23 March 2018, Hobart, Tasmania (2018) [Conference Extract]

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The spatial variation of heat supplied to ice sheets is an important input model parameter in ice sheet models. Continental models of heat flow (usually referred to in the cryosphere research community as heat flux density, abbreviated to heat flux) may be calculated using seismic wavespeed tomography maps or by inference from other geophysical observables. These broadscale maps are interpolated, smoothed representations. Upper crustal models, in contrast, are generated directly from measuring the heat production of dominant or particularly radiogenic lithologies.

In this contribution, we combine interpolated and locally observed contributions to heat flow models with a focus on East Antarctica, including the continental interior which is covered by ice of several kilometres thickness. We review alternative approaches to combining low resolution information on the deeper lithosphere with broad spatial coverage, and high resolution information with very limited spatial coverage relating to the present day upper crust. Providing effective estimates of the heat supplied by the upper crust is an important research goal due to the significance of small pockets of elevated heat flow on ice sheet models. Alternative approaches inform future probabilistic solid Earth constraints for ice sheet models.

Item Details

Item Type:Conference Extract
Keywords:Antarctica, heat flow, ice sheet modelling
Research Division:Earth Sciences
Research Group:Geophysics
Research Field:Seismology and seismic exploration
Objective Division:Environmental Policy, Climate Change and Natural Hazards
Objective Group:Understanding climate change
Objective Field:Effects of climate change on Antarctic and sub-Antarctic environments (excl. social impacts)
UTAS Author:Reading, A (Professor Anya Reading)
UTAS Author:Staal, T (Dr Tobias Staal)
UTAS Author:Halpin, J (Dr Jacqueline Halpin)
UTAS Author:Whittaker, J (Associate Professor Jo Whittaker)
ID Code:131200
Year Published:2018
Deposited By:Oceans and Cryosphere
Deposited On:2019-03-06
Last Modified:2019-03-06

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