A new heat flux model for the Antarctic Peninsula incorporating spatially variable upper crustal radiogenic heat production
A new method for modeling heat flux shows that 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...
Published in: | Geophysical Research Letters |
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Amer Geophysical Union
2017
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Online Access: | https://eprints.utas.edu.au/38859/ https://eprints.utas.edu.au/38859/1/116816%20-%20Burton-Johnson_et_al-2017-Geophysical_Research_Letters.pdf https://doi.org/10.1002/2017GL073596 |
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ftunivtasmania:oai:eprints.utas.edu.au:38859 2023-05-15T13:42:39+02:00 A new heat flux model for the Antarctic Peninsula incorporating spatially variable upper crustal radiogenic heat production Burton-Johnson, A Halpin, JA Whittaker, JM Graham, FS Watson, SJ 2017 application/pdf https://eprints.utas.edu.au/38859/ https://eprints.utas.edu.au/38859/1/116816%20-%20Burton-Johnson_et_al-2017-Geophysical_Research_Letters.pdf https://doi.org/10.1002/2017GL073596 en eng Amer Geophysical Union https://eprints.utas.edu.au/38859/1/116816%20-%20Burton-Johnson_et_al-2017-Geophysical_Research_Letters.pdf Burton-Johnson, A, Halpin, JA orcid:0000-0002-4992-8681 , Whittaker, JM orcid:0000-0002-3170-3935 , Graham, FS orcid:0000-0002-2324-2120 and Watson, SJ 2017 , 'A new heat flux model for the Antarctic Peninsula incorporating spatially variable upper crustal radiogenic heat production' , Geophysical Research Letters, vol. 44, no. 11 , pp. 5436-5446 , doi:10.1002/2017GL073596 <http://dx.doi.org/10.1002/2017GL073596>. Antarctic geothermal heat flux radiogenic heat production upper crust Article PeerReviewed 2017 ftunivtasmania https://doi.org/10.1002/2017GL073596 2021-12-13T23:17:53Z A new method for modeling heat flux shows that 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 mW m−2) where silicic rocks predominate, than on the west and north (mean 67 mW m−2) where volcanic arc and quartzose sediments are dominant. While the data supports the contribution of heat-producing element-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 data set facilitate improved numerical model simulations of ice sheet dynamics. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Ice Sheet University of Tasmania: UTas ePrints Antarctic Antarctic Peninsula The Antarctic Geophysical Research Letters 44 11 5436 5446 |
institution |
Open Polar |
collection |
University of Tasmania: UTas ePrints |
op_collection_id |
ftunivtasmania |
language |
English |
topic |
Antarctic geothermal heat flux radiogenic heat production upper crust |
spellingShingle |
Antarctic geothermal heat flux radiogenic heat production upper crust Burton-Johnson, A Halpin, JA Whittaker, JM Graham, FS Watson, SJ A new heat flux model for the Antarctic Peninsula incorporating spatially variable upper crustal radiogenic heat production |
topic_facet |
Antarctic geothermal heat flux radiogenic heat production upper crust |
description |
A new method for modeling heat flux shows that 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 mW m−2) where silicic rocks predominate, than on the west and north (mean 67 mW m−2) where volcanic arc and quartzose sediments are dominant. While the data supports the contribution of heat-producing element-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 data set facilitate improved numerical model simulations of ice sheet dynamics. |
format |
Article in Journal/Newspaper |
author |
Burton-Johnson, A Halpin, JA Whittaker, JM Graham, FS Watson, SJ |
author_facet |
Burton-Johnson, A Halpin, JA Whittaker, JM Graham, FS Watson, SJ |
author_sort |
Burton-Johnson, A |
title |
A new heat flux model for the Antarctic Peninsula incorporating spatially variable upper crustal radiogenic heat production |
title_short |
A new heat flux model for the Antarctic Peninsula incorporating spatially variable upper crustal radiogenic heat production |
title_full |
A new heat flux model for the Antarctic Peninsula incorporating spatially variable upper crustal radiogenic heat production |
title_fullStr |
A new heat flux model for the Antarctic Peninsula incorporating spatially variable upper crustal radiogenic heat production |
title_full_unstemmed |
A new heat flux model for the Antarctic Peninsula incorporating spatially variable upper crustal radiogenic heat production |
title_sort |
new heat flux model for the antarctic peninsula incorporating spatially variable upper crustal radiogenic heat production |
publisher |
Amer Geophysical Union |
publishDate |
2017 |
url |
https://eprints.utas.edu.au/38859/ https://eprints.utas.edu.au/38859/1/116816%20-%20Burton-Johnson_et_al-2017-Geophysical_Research_Letters.pdf https://doi.org/10.1002/2017GL073596 |
geographic |
Antarctic Antarctic Peninsula The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula The Antarctic |
genre |
Antarc* Antarctic Antarctic Peninsula Ice Sheet |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Ice Sheet |
op_relation |
https://eprints.utas.edu.au/38859/1/116816%20-%20Burton-Johnson_et_al-2017-Geophysical_Research_Letters.pdf Burton-Johnson, A, Halpin, JA orcid:0000-0002-4992-8681 , Whittaker, JM orcid:0000-0002-3170-3935 , Graham, FS orcid:0000-0002-2324-2120 and Watson, SJ 2017 , 'A new heat flux model for the Antarctic Peninsula incorporating spatially variable upper crustal radiogenic heat production' , Geophysical Research Letters, vol. 44, no. 11 , pp. 5436-5446 , doi:10.1002/2017GL073596 <http://dx.doi.org/10.1002/2017GL073596>. |
op_doi |
https://doi.org/10.1002/2017GL073596 |
container_title |
Geophysical Research Letters |
container_volume |
44 |
container_issue |
11 |
container_start_page |
5436 |
op_container_end_page |
5446 |
_version_ |
1766170723701751808 |