Antarctic Geothermal Heat Flow Model: Aq1
Abstract 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 co...
Published in: | Geochemistry, Geophysics, Geosystems |
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2021
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Online Access: | https://doi.org/10.1029/2020GC009428 https://doaj.org/article/1f8d3d45e1384a8a85b10afb92b25778 |
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ftdoajarticles:oai:doaj.org/article:1f8d3d45e1384a8a85b10afb92b25778 2023-12-03T10:13:52+01:00 Antarctic Geothermal Heat Flow Model: Aq1 Tobias Stål Anya M. Reading Jacqueline A. Halpin Joanne M. Whittaker 2021-02-01T00:00:00Z https://doi.org/10.1029/2020GC009428 https://doaj.org/article/1f8d3d45e1384a8a85b10afb92b25778 EN eng Wiley https://doi.org/10.1029/2020GC009428 https://doaj.org/toc/1525-2027 1525-2027 doi:10.1029/2020GC009428 https://doaj.org/article/1f8d3d45e1384a8a85b10afb92b25778 Geochemistry, Geophysics, Geosystems, Vol 22, Iss 2, Pp n/a-n/a (2021) Antarctica heat flow geothermal multivariate Geophysics. Cosmic physics QC801-809 Geology QE1-996.5 article 2021 ftdoajarticles https://doi.org/10.1029/2020GC009428 2023-11-05T01:35:55Z Abstract 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 150 mW m−2. We also map elevated values over 80 mW m−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 mW m−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 Directory of Open Access Journals: DOAJ Articles Antarctic Byrd Coats Land ENVELOPE(-27.500,-27.500,-77.000,-77.000) Marie Byrd Land ENVELOPE(-130.000,-130.000,-78.000,-78.000) Palmer Land ENVELOPE(-65.000,-65.000,-71.500,-71.500) Queen Mary Land ENVELOPE(96.000,96.000,-68.000,-68.000) Thwaites Glacier ENVELOPE(-106.750,-106.750,-75.500,-75.500) Victoria Land Wilkes Land ENVELOPE(120.000,120.000,-69.000,-69.000) Geochemistry, Geophysics, Geosystems 22 2 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Antarctica heat flow geothermal multivariate Geophysics. Cosmic physics QC801-809 Geology QE1-996.5 |
spellingShingle |
Antarctica heat flow geothermal multivariate Geophysics. Cosmic physics QC801-809 Geology QE1-996.5 Tobias Stål Anya M. Reading Jacqueline A. Halpin Joanne M. Whittaker Antarctic Geothermal Heat Flow Model: Aq1 |
topic_facet |
Antarctica heat flow geothermal multivariate Geophysics. Cosmic physics QC801-809 Geology QE1-996.5 |
description |
Abstract 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 150 mW m−2. We also map elevated values over 80 mW m−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 mW m−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 |
Tobias Stål Anya M. Reading Jacqueline A. Halpin Joanne M. Whittaker |
author_facet |
Tobias Stål Anya M. Reading Jacqueline A. Halpin Joanne M. Whittaker |
author_sort |
Tobias Stål |
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 |
Wiley |
publishDate |
2021 |
url |
https://doi.org/10.1029/2020GC009428 https://doaj.org/article/1f8d3d45e1384a8a85b10afb92b25778 |
long_lat |
ENVELOPE(-27.500,-27.500,-77.000,-77.000) ENVELOPE(-130.000,-130.000,-78.000,-78.000) ENVELOPE(-65.000,-65.000,-71.500,-71.500) ENVELOPE(96.000,96.000,-68.000,-68.000) ENVELOPE(-106.750,-106.750,-75.500,-75.500) ENVELOPE(120.000,120.000,-69.000,-69.000) |
geographic |
Antarctic Byrd Coats Land Marie Byrd Land Palmer Land Queen Mary Land Thwaites Glacier Victoria Land Wilkes Land |
geographic_facet |
Antarctic Byrd Coats Land Marie Byrd Land Palmer Land Queen Mary Land Thwaites Glacier Victoria Land Wilkes 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_source |
Geochemistry, Geophysics, Geosystems, Vol 22, Iss 2, Pp n/a-n/a (2021) |
op_relation |
https://doi.org/10.1029/2020GC009428 https://doaj.org/toc/1525-2027 1525-2027 doi:10.1029/2020GC009428 https://doaj.org/article/1f8d3d45e1384a8a85b10afb92b25778 |
op_doi |
https://doi.org/10.1029/2020GC009428 |
container_title |
Geochemistry, Geophysics, Geosystems |
container_volume |
22 |
container_issue |
2 |
_version_ |
1784260823031480320 |