A new heat flux model for the Antarctic Peninsula incorporating variable crustal radiogenic heat production
We present findings recently published in GRL (Burton-Johnson et al., 2017) on the variability of Antarctic sub-glacial heat flux and the impact from upper crustal geology.A new method reveals that the upper crust contributes up to 70% of the Antarctic Peninsulas subglacial heat flux, and that heat...
Main Authors: | , , , , |
---|---|
Format: | Conference Object |
Language: | English |
Published: |
.
2018
|
Subjects: | |
Online Access: | http://www.conferences.com.au/2018tactical/program/ http://ecite.utas.edu.au/126741 |
id |
ftunivtasecite:oai:ecite.utas.edu.au:126741 |
---|---|
record_format |
openpolar |
spelling |
ftunivtasecite:oai:ecite.utas.edu.au:126741 2023-05-15T13:55:18+02:00 A new heat flux model for the Antarctic Peninsula incorporating variable crustal radiogenic heat production Burton-Johnson, A Halpin, JA Whittaker, J Graham, F Watson, S 2018 application/pdf http://www.conferences.com.au/2018tactical/program/ http://ecite.utas.edu.au/126741 en eng . http://ecite.utas.edu.au/126741/1/TACTical-Abstract-Book-.pdf Burton-Johnson, A and Halpin, JA and Whittaker, J and Graham, F and Watson, S, A new heat flux model for the Antarctic Peninsula incorporating variable crustal radiogenic heat production, TACtical Workshop: Taking the Temperature of the Antarctic Continent Abstract book, 21-23 March, Hobart, Tasmania (2018) [Conference Extract] http://ecite.utas.edu.au/126741 Earth Sciences Geology Geology not elsewhere classified Conference Extract NonPeerReviewed 2018 ftunivtasecite 2019-12-13T22:25:09Z We present findings recently published in GRL (Burton-Johnson et al., 2017) on the variability of Antarctic sub-glacial heat flux and the impact from upper crustal geology.A new method reveals that the upper crust contributes up to 70% of the Antarctic Peninsulas 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 heat producing element-enriched granitic rocks to high heat flux values, sedimentary rocks can be comparable 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.The most significant challenge faced remains accurate determination of crustal structure, particularly the depths of the heat producing element-enriched sedimentary basins and the sub-glacial geology away from exposed outcrops. Continuing research (particularly detailed geophysical interpretation) will better constrain these unknowns and the effect of upper crustal geology on the Antarctic ice sheet. Conference Object Antarc* Antarctic Antarctic Peninsula Ice Sheet eCite UTAS (University of Tasmania) Antarctic Antarctic Peninsula Burton ENVELOPE(166.733,166.733,-72.550,-72.550) The Antarctic |
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, J Graham, F Watson, S A new heat flux model for the Antarctic Peninsula incorporating variable crustal radiogenic heat production |
topic_facet |
Earth Sciences Geology Geology not elsewhere classified |
description |
We present findings recently published in GRL (Burton-Johnson et al., 2017) on the variability of Antarctic sub-glacial heat flux and the impact from upper crustal geology.A new method reveals that the upper crust contributes up to 70% of the Antarctic Peninsulas 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 heat producing element-enriched granitic rocks to high heat flux values, sedimentary rocks can be comparable 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.The most significant challenge faced remains accurate determination of crustal structure, particularly the depths of the heat producing element-enriched sedimentary basins and the sub-glacial geology away from exposed outcrops. Continuing research (particularly detailed geophysical interpretation) will better constrain these unknowns and the effect of upper crustal geology on the Antarctic ice sheet. |
format |
Conference Object |
author |
Burton-Johnson, A Halpin, JA Whittaker, J Graham, F Watson, S |
author_facet |
Burton-Johnson, A Halpin, JA Whittaker, J Graham, F Watson, S |
author_sort |
Burton-Johnson, A |
title |
A new heat flux model for the Antarctic Peninsula incorporating variable crustal radiogenic heat production |
title_short |
A new heat flux model for the Antarctic Peninsula incorporating variable crustal radiogenic heat production |
title_full |
A new heat flux model for the Antarctic Peninsula incorporating variable crustal radiogenic heat production |
title_fullStr |
A new heat flux model for the Antarctic Peninsula incorporating variable crustal radiogenic heat production |
title_full_unstemmed |
A new heat flux model for the Antarctic Peninsula incorporating variable crustal radiogenic heat production |
title_sort |
new heat flux model for the antarctic peninsula incorporating variable crustal radiogenic heat production |
publisher |
. |
publishDate |
2018 |
url |
http://www.conferences.com.au/2018tactical/program/ http://ecite.utas.edu.au/126741 |
long_lat |
ENVELOPE(166.733,166.733,-72.550,-72.550) |
geographic |
Antarctic Antarctic Peninsula Burton The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula Burton The Antarctic |
genre |
Antarc* Antarctic Antarctic Peninsula Ice Sheet |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Ice Sheet |
op_relation |
http://ecite.utas.edu.au/126741/1/TACTical-Abstract-Book-.pdf Burton-Johnson, A and Halpin, JA and Whittaker, J and Graham, F and Watson, S, A new heat flux model for the Antarctic Peninsula incorporating variable crustal radiogenic heat production, TACtical Workshop: Taking the Temperature of the Antarctic Continent Abstract book, 21-23 March, Hobart, Tasmania (2018) [Conference Extract] http://ecite.utas.edu.au/126741 |
_version_ |
1766261678056407040 |