GHF inferred from in-situ temperature measurements in the Amundsen Sea, West Antarctica
Due to a complex tectonic and magmatic history of West Antarctica, the region is suspected to exhibit strong heterogeneous geothermal heat flux variations. Although the maximum ice extent has retreated from the shelf since the last glacial maximum, the trends of offshore GHF patterns and the overall...
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ftawi:oai:epic.awi.de:46947 2023-05-15T13:23:42+02:00 GHF inferred from in-situ temperature measurements in the Amundsen Sea, West Antarctica Dziadek, Ricarda Gohl, Karsten Kaul, Norbert 2018-03 https://epic.awi.de/id/eprint/46947/ https://hdl.handle.net/10013/epic.07d26992-ada9-4ab9-aee2-f6c566075445 unknown Dziadek, R. , Gohl, K. orcid:0000-0002-9558-2116 and Kaul, N. (2018) GHF inferred from in-situ temperature measurements in the Amundsen Sea, West Antarctica , TACtical Workshop, Hobart, Australia, 21 March 2018 - 23 March 2018 . hdl:10013/epic.07d26992-ada9-4ab9-aee2-f6c566075445 EPIC3TACtical Workshop, Hobart, Australia, 2018-03-21-2018-03-23 Conference notRev 2018 ftawi 2021-12-24T15:43:47Z Due to a complex tectonic and magmatic history of West Antarctica, the region is suspected to exhibit strong heterogeneous geothermal heat flux variations. Although the maximum ice extent has retreated from the shelf since the last glacial maximum, the trends of offshore GHF patterns and the overall order of magnitude are hypothetically related to those areas onshore where the West Antarctic Ice Sheet (WAIS) rests on geologically related structures. High-resolution GHF will aid the understanding of the paleo-retreat of the ice sheet in the Amundsen Sea Sector. This presentation builds on our previous studies in which we discussed geothermal heat flux based on 26 in-situ temperature measurements that were conducted in 2010 in the Amundsen Sea Embayment (ASE) in West Antarctica. We found, that the shallow (3 m) in-situ temperature measurements were likely influenced by inter-annual bottom-water temperature variability, leading to GHF estimates biased towards lower values (mean = 33 mWm-²). During RV Polarstern expedition PS104 in early 2017 we collected additional 28 in-situ temperature measurements in marine sediments (11 m) for deriving geothermal heat flux in the ASE, which will overall improve the spatial coverage of this region. Furthermore, we monitored the vertical temperature profile of the water column at these stations, which allows to map Circumpolar Deep Water (CDW) distributions across the inner Pine Island Shelf with greater detail. Conference Object Amundsen Sea Antarc* Antarctic Antarctica Ice Sheet Pine Island West Antarctica Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Amundsen Sea Antarctic West Antarctic Ice Sheet West Antarctica |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
language |
unknown |
description |
Due to a complex tectonic and magmatic history of West Antarctica, the region is suspected to exhibit strong heterogeneous geothermal heat flux variations. Although the maximum ice extent has retreated from the shelf since the last glacial maximum, the trends of offshore GHF patterns and the overall order of magnitude are hypothetically related to those areas onshore where the West Antarctic Ice Sheet (WAIS) rests on geologically related structures. High-resolution GHF will aid the understanding of the paleo-retreat of the ice sheet in the Amundsen Sea Sector. This presentation builds on our previous studies in which we discussed geothermal heat flux based on 26 in-situ temperature measurements that were conducted in 2010 in the Amundsen Sea Embayment (ASE) in West Antarctica. We found, that the shallow (3 m) in-situ temperature measurements were likely influenced by inter-annual bottom-water temperature variability, leading to GHF estimates biased towards lower values (mean = 33 mWm-²). During RV Polarstern expedition PS104 in early 2017 we collected additional 28 in-situ temperature measurements in marine sediments (11 m) for deriving geothermal heat flux in the ASE, which will overall improve the spatial coverage of this region. Furthermore, we monitored the vertical temperature profile of the water column at these stations, which allows to map Circumpolar Deep Water (CDW) distributions across the inner Pine Island Shelf with greater detail. |
format |
Conference Object |
author |
Dziadek, Ricarda Gohl, Karsten Kaul, Norbert |
spellingShingle |
Dziadek, Ricarda Gohl, Karsten Kaul, Norbert GHF inferred from in-situ temperature measurements in the Amundsen Sea, West Antarctica |
author_facet |
Dziadek, Ricarda Gohl, Karsten Kaul, Norbert |
author_sort |
Dziadek, Ricarda |
title |
GHF inferred from in-situ temperature measurements in the Amundsen Sea, West Antarctica |
title_short |
GHF inferred from in-situ temperature measurements in the Amundsen Sea, West Antarctica |
title_full |
GHF inferred from in-situ temperature measurements in the Amundsen Sea, West Antarctica |
title_fullStr |
GHF inferred from in-situ temperature measurements in the Amundsen Sea, West Antarctica |
title_full_unstemmed |
GHF inferred from in-situ temperature measurements in the Amundsen Sea, West Antarctica |
title_sort |
ghf inferred from in-situ temperature measurements in the amundsen sea, west antarctica |
publishDate |
2018 |
url |
https://epic.awi.de/id/eprint/46947/ https://hdl.handle.net/10013/epic.07d26992-ada9-4ab9-aee2-f6c566075445 |
geographic |
Amundsen Sea Antarctic West Antarctic Ice Sheet West Antarctica |
geographic_facet |
Amundsen Sea Antarctic West Antarctic Ice Sheet West Antarctica |
genre |
Amundsen Sea Antarc* Antarctic Antarctica Ice Sheet Pine Island West Antarctica |
genre_facet |
Amundsen Sea Antarc* Antarctic Antarctica Ice Sheet Pine Island West Antarctica |
op_source |
EPIC3TACtical Workshop, Hobart, Australia, 2018-03-21-2018-03-23 |
op_relation |
Dziadek, R. , Gohl, K. orcid:0000-0002-9558-2116 and Kaul, N. (2018) GHF inferred from in-situ temperature measurements in the Amundsen Sea, West Antarctica , TACtical Workshop, Hobart, Australia, 21 March 2018 - 23 March 2018 . hdl:10013/epic.07d26992-ada9-4ab9-aee2-f6c566075445 |
_version_ |
1766374236139552768 |