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Combining interpolated and locally observed contributions to heat flow models
conference contribution
posted on 2023-05-24, 18:29 authored by Anya ReadingAnya Reading, Tobias StaalTobias Staal, Jacqueline HalpinJacqueline Halpin, Joanne WhittakerJoanne WhittakerThe 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.
History
Publication title
TACtical Workshop AbstractsDepartment/School
School of Natural SciencesEvent title
TACtical WorkshopEvent Venue
Hobart, TasmaniaDate of Event (Start Date)
2018-03-21Date of Event (End Date)
2018-03-23Repository Status
- Restricted