nerc.ac.uk

A new heat flux model for the Antarctic Peninsula incorporating spatially variable upper crustal radiogenic heat production

Burton-Johnson, A.; Halpin, J.A.; Whittaker, J.M.; Graham, F.S.; Watson, S.J.. 2017 A new heat flux model for the Antarctic Peninsula incorporating spatially variable upper crustal radiogenic heat production. Geophysical Research Letters, 44 (11). 5436-5446. 10.1002/2017GL073596

Before downloading, please read NORA policies.
[img] Text
Copyright American Geophysical Union
Burton-Johnson 2017 - A new heat flux model.pdf
Restricted to NORA staff only until 15 November 2017.

Download (1MB) | Request a copy

Abstract/Summary

A new method for modelling heat flux shows the upper crust contributes up to 70% of the Antarctic Peninsula's subglacial heat flux, and that heat flux values are more variable at smaller spatial resolutions than geophysical methods can resolve. Results indicate a higher heat flux on the east and south of the Peninsula (mean 81 mWm-2) where silicic rocks predominate, than on the west and north (mean 67 mWm-2) where volcanic arc and quartzose sediments are dominant. Whilst the data supports the contribution of HPE-enriched granitic rocks to high heat flux values, sedimentary rocks can be of comparative importance dependent on their provenance and petrography. Models of subglacial heat flux must utilize a heterogeneous upper crust with variable radioactive heat production if they are to accurately predict basal conditions of the ice sheet. Our new methodology and dataset facilitate improved numerical model simulations of ice sheet dynamics.

Item Type: Publication - Article
Digital Object Identifier (DOI): 10.1002/2017GL073596
Programmes: BAS Programmes > BAS Programmes 2015 > Geology and Geophysics
ISSN: 0094-8276
Date made live: 24 May 2017 13:47 +0 (UTC)
URI: http://nora.nerc.ac.uk/id/eprint/516715

Actions (login required)

View Item View Item

Document Downloads

Downloads for past 30 days

Downloads per month over past year

More statistics for this item...