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...
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Online Access: | https://doi.org/10.1002/2017GL073596 http://ecite.utas.edu.au/116816 |
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ftunivtasecite:oai:ecite.utas.edu.au:116816 2023-05-15T13:42:40+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 https://doi.org/10.1002/2017GL073596 http://ecite.utas.edu.au/116816 en eng Amer Geophysical Union http://dx.doi.org/10.1002/2017GL073596 Burton-Johnson, A and Halpin, JA and Whittaker, JM and Graham, FS and Watson, SJ, A new heat flux model for the Antarctic Peninsula incorporating spatially variable upper crustal radiogenic heat production, Geophysical Research Letters, 44, (11) pp. 5436-5446. ISSN 0094-8276 (2017) [Refereed Article] http://ecite.utas.edu.au/116816 Earth Sciences Geology Geology not elsewhere classified Refereed Article PeerReviewed 2017 ftunivtasecite https://doi.org/10.1002/2017GL073596 2022-08-29T22:17:02Z 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 81mWm −2 ) where silicic rocks predominate, than on the west and north (mean 67mWm −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 eCite UTAS (University of Tasmania) Antarctic Antarctic Peninsula The Antarctic Geophysical Research Letters 44 11 5436 5446 |
institution |
Open Polar |
collection |
eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Earth Sciences Geology Geology not elsewhere classified |
spellingShingle |
Earth Sciences Geology Geology not elsewhere classified 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 |
Earth Sciences Geology Geology not elsewhere classified |
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 81mWm −2 ) where silicic rocks predominate, than on the west and north (mean 67mWm −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://doi.org/10.1002/2017GL073596 http://ecite.utas.edu.au/116816 |
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 |
http://dx.doi.org/10.1002/2017GL073596 Burton-Johnson, A and Halpin, JA and Whittaker, JM and Graham, FS and Watson, SJ, A new heat flux model for the Antarctic Peninsula incorporating spatially variable upper crustal radiogenic heat production, Geophysical Research Letters, 44, (11) pp. 5436-5446. ISSN 0094-8276 (2017) [Refereed Article] http://ecite.utas.edu.au/116816 |
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_ |
1766171036370337792 |