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Combining upper crust and lithosphere contributions to heat flow models
conference contribution
posted on 2023-05-24, 18:31 authored by Anya ReadingAnya Reading, Tobias StaalTobias Staal, Jacqueline HalpinJacqueline Halpin, Joanne WhittakerJoanne WhittakerGeothermal heat supplied to the base of Antarctic ice sheets, and the spatial variation of supplied heat, 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 generated using seismic wavespeed tomography maps or by inference from other geophysical observables. Upper crustal models, however, are generated directly from measuring the heat production of dominant or particularly radiogenic lithologies. In this contribution, we combine upper crust and lithosphere 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 upper crustal. 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. Our model for East Antarctica represents a step towards future probabilistic approaches to solid Earth constraints for ice sheet models.
History
Publication title
POLAR2018 Open Science Conference Abstract ProceedingsPagination
2479Department/School
School of Natural SciencesEvent title
POLAR2018Event Venue
Davos, SwitzerlandDate of Event (Start Date)
2018-06-19Date of Event (End Date)
2018-06-23Repository Status
- Restricted