Antarctic Geothermal Heat Flow Model: Aq1
We present a refined map of geothermal heat flow for Antarctica, Aq1, based on multiple observables. The map is generated using a similarity detection approach by attributing observables from geophysics and geology to a large number of high‐quality heat flow values ( N =5,792) from other continents....
Published in: | Geochemistry, Geophysics, Geosystems |
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Amer Geophysical Union
2020
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Online Access: | https://doi.org/10.1029/2020GC009428 http://ecite.utas.edu.au/143094 |
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ftunivtasecite:oai:ecite.utas.edu.au:143094 2023-05-15T13:42:40+02:00 Antarctic Geothermal Heat Flow Model: Aq1 Staal, T Reading, AM Halpin, JA Whittaker, J 2020 https://doi.org/10.1029/2020GC009428 http://ecite.utas.edu.au/143094 en eng Amer Geophysical Union http://dx.doi.org/10.1029/2020GC009428 Staal, T and Reading, AM and Halpin, JA and Whittaker, J, Antarctic Geothermal Heat Flow Model: Aq1, Geochemistry, Geophysics, Geosystems, 22, (2) Article e2020GC009428. ISSN 1525-2027 (2020) [Refereed Article] http://ecite.utas.edu.au/143094 Engineering Fluid mechanics and thermal engineering Computational methods in fluid flow heat and mass transfer (incl. computational fluid dynamics) Refereed Article PeerReviewed 2020 ftunivtasecite https://doi.org/10.1029/2020GC009428 2022-08-29T22:18:13Z We present a refined map of geothermal heat flow for Antarctica, Aq1, based on multiple observables. The map is generated using a similarity detection approach by attributing observables from geophysics and geology to a large number of high‐quality heat flow values ( N =5,792) from other continents. Observables from global, continental, and regional datasets for Antarctica are used with a weighting function that allows the degree of similarity to increase with proximity and how similar the observables are. The similarity detection parameters are optimized through cross correlation. For each grid cell in Antarctica, a weighted average heat flow value and uncertainty metrics are calculated. The Aq1 model provides higher spatial resolution in comparison to previous results. High heat flow is shown in the Thwaites Glacier region, with local values over 150mWm −2 . We also map elevated values over 80 mWm −2 in Palmer Land, Marie Byrd Land, Victoria Land and Queen Mary Land. Very low heat flow is shown in the interior of Wilkes Land and Coats Land, with values under 40 mWm −2 . We anticipate that the new geothermal heat flow map, Aq1, and its uncertainty bounds will find extended use in providing boundary conditions for ice sheet modeling and understanding the interactions between the cryosphere and solid Earth. The computational framework and open architecture allow for the model to be reproduced, adapted and updated with additional data, or model subsets to be output at higher resolution for regional studies. Article in Journal/Newspaper Antarc* Antarctic Antarctica Ice Sheet Marie Byrd Land Palmer Land Queen Mary land Thwaites Glacier Victoria Land Wilkes Land eCite UTAS (University of Tasmania) Antarctic Victoria Land Byrd Wilkes Land ENVELOPE(120.000,120.000,-69.000,-69.000) Marie Byrd Land ENVELOPE(-130.000,-130.000,-78.000,-78.000) Thwaites Glacier ENVELOPE(-106.750,-106.750,-75.500,-75.500) Palmer Land ENVELOPE(-65.000,-65.000,-71.500,-71.500) Coats Land ENVELOPE(-27.500,-27.500,-77.000,-77.000) Queen Mary Land ENVELOPE(96.000,96.000,-68.000,-68.000) Geochemistry, Geophysics, Geosystems 22 2 |
institution |
Open Polar |
collection |
eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Engineering Fluid mechanics and thermal engineering Computational methods in fluid flow heat and mass transfer (incl. computational fluid dynamics) |
spellingShingle |
Engineering Fluid mechanics and thermal engineering Computational methods in fluid flow heat and mass transfer (incl. computational fluid dynamics) Staal, T Reading, AM Halpin, JA Whittaker, J Antarctic Geothermal Heat Flow Model: Aq1 |
topic_facet |
Engineering Fluid mechanics and thermal engineering Computational methods in fluid flow heat and mass transfer (incl. computational fluid dynamics) |
description |
We present a refined map of geothermal heat flow for Antarctica, Aq1, based on multiple observables. The map is generated using a similarity detection approach by attributing observables from geophysics and geology to a large number of high‐quality heat flow values ( N =5,792) from other continents. Observables from global, continental, and regional datasets for Antarctica are used with a weighting function that allows the degree of similarity to increase with proximity and how similar the observables are. The similarity detection parameters are optimized through cross correlation. For each grid cell in Antarctica, a weighted average heat flow value and uncertainty metrics are calculated. The Aq1 model provides higher spatial resolution in comparison to previous results. High heat flow is shown in the Thwaites Glacier region, with local values over 150mWm −2 . We also map elevated values over 80 mWm −2 in Palmer Land, Marie Byrd Land, Victoria Land and Queen Mary Land. Very low heat flow is shown in the interior of Wilkes Land and Coats Land, with values under 40 mWm −2 . We anticipate that the new geothermal heat flow map, Aq1, and its uncertainty bounds will find extended use in providing boundary conditions for ice sheet modeling and understanding the interactions between the cryosphere and solid Earth. The computational framework and open architecture allow for the model to be reproduced, adapted and updated with additional data, or model subsets to be output at higher resolution for regional studies. |
format |
Article in Journal/Newspaper |
author |
Staal, T Reading, AM Halpin, JA Whittaker, J |
author_facet |
Staal, T Reading, AM Halpin, JA Whittaker, J |
author_sort |
Staal, T |
title |
Antarctic Geothermal Heat Flow Model: Aq1 |
title_short |
Antarctic Geothermal Heat Flow Model: Aq1 |
title_full |
Antarctic Geothermal Heat Flow Model: Aq1 |
title_fullStr |
Antarctic Geothermal Heat Flow Model: Aq1 |
title_full_unstemmed |
Antarctic Geothermal Heat Flow Model: Aq1 |
title_sort |
antarctic geothermal heat flow model: aq1 |
publisher |
Amer Geophysical Union |
publishDate |
2020 |
url |
https://doi.org/10.1029/2020GC009428 http://ecite.utas.edu.au/143094 |
long_lat |
ENVELOPE(120.000,120.000,-69.000,-69.000) ENVELOPE(-130.000,-130.000,-78.000,-78.000) ENVELOPE(-106.750,-106.750,-75.500,-75.500) ENVELOPE(-65.000,-65.000,-71.500,-71.500) ENVELOPE(-27.500,-27.500,-77.000,-77.000) ENVELOPE(96.000,96.000,-68.000,-68.000) |
geographic |
Antarctic Victoria Land Byrd Wilkes Land Marie Byrd Land Thwaites Glacier Palmer Land Coats Land Queen Mary Land |
geographic_facet |
Antarctic Victoria Land Byrd Wilkes Land Marie Byrd Land Thwaites Glacier Palmer Land Coats Land Queen Mary Land |
genre |
Antarc* Antarctic Antarctica Ice Sheet Marie Byrd Land Palmer Land Queen Mary land Thwaites Glacier Victoria Land Wilkes Land |
genre_facet |
Antarc* Antarctic Antarctica Ice Sheet Marie Byrd Land Palmer Land Queen Mary land Thwaites Glacier Victoria Land Wilkes Land |
op_relation |
http://dx.doi.org/10.1029/2020GC009428 Staal, T and Reading, AM and Halpin, JA and Whittaker, J, Antarctic Geothermal Heat Flow Model: Aq1, Geochemistry, Geophysics, Geosystems, 22, (2) Article e2020GC009428. ISSN 1525-2027 (2020) [Refereed Article] http://ecite.utas.edu.au/143094 |
op_doi |
https://doi.org/10.1029/2020GC009428 |
container_title |
Geochemistry, Geophysics, Geosystems |
container_volume |
22 |
container_issue |
2 |
_version_ |
1766171203156836352 |