Towards Closing the Polar Gap: New Marine Heat Flow Observations in Antarctica and the Arctic Ocean
The thermal state of the lithosphere and related geothermal heat flow (GHF) is a crucial parameter to understand a variety of processes related to cryospheric, geospheric, and/or biospheric interactions. Indirect estimates of GHF in polar regions from magnetic, seismological, or petrological data of...
Published in: | Geosciences |
---|---|
Main Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
MDPI
2020
|
Subjects: | |
Online Access: | https://epic.awi.de/id/eprint/53485/ https://doi.org/10.3390/geosciences11010011 https://hdl.handle.net/10013/epic.3be087b0-9585-4576-806c-8fbd599fb79c |
id |
ftawi:oai:epic.awi.de:53485 |
---|---|
record_format |
openpolar |
spelling |
ftawi:oai:epic.awi.de:53485 2023-05-15T13:45:22+02:00 Towards Closing the Polar Gap: New Marine Heat Flow Observations in Antarctica and the Arctic Ocean Dziadek, Ricarda Doll, Mechthild Warnke, Fynn Schlindwein, Vera 2020-12-27 https://epic.awi.de/id/eprint/53485/ https://doi.org/10.3390/geosciences11010011 https://hdl.handle.net/10013/epic.3be087b0-9585-4576-806c-8fbd599fb79c unknown MDPI Dziadek, R. orcid:0000-0001-8689-9181 , Doll, M. , Warnke, F. orcid:0000-0002-7477-5058 and Schlindwein, V. orcid:0000-0001-5570-2753 (2020) Towards Closing the Polar Gap: New Marine Heat Flow Observations in Antarctica and the Arctic Ocean , Geosciences, 11 (1), pp. 1-19 . doi:10.3390/geosciences11010011 <https://doi.org/10.3390/geosciences11010011> , hdl:10013/epic.3be087b0-9585-4576-806c-8fbd599fb79c EPIC3Geosciences, MDPI, 11(1), pp. 1-19, ISSN: 2076-3263 Article isiRev 2020 ftawi https://doi.org/10.3390/geosciences11010011 2021-12-24T15:46:04Z The thermal state of the lithosphere and related geothermal heat flow (GHF) is a crucial parameter to understand a variety of processes related to cryospheric, geospheric, and/or biospheric interactions. Indirect estimates of GHF in polar regions from magnetic, seismological, or petrological data often show large discrepancies when compared to thermal in situ observations. Here, the lack of in situ data represents a fundamental limitation for both investigating thermal processes of the lithosphere and validating indirect heat flow estimates. During RV Polarstern expeditions PS86 and PS118, we obtained in situ thermal measurements and present the derived GHF in key regions, such as the Antarctic Peninsula and the Gakkel Ridge in the Arctic. By comparison with indirect models, our results indicate (1) elevated geothermal heat flow (75 ± 5 mW m−2 to 139 ± 26 mW m−2) to the west of the Antarctic Peninsula, which should be considered for future investigations of ice-sheet dynamics and the visco-elastic behavior of the crust. (2) The thermal signature of the Powell Basin characteristic for oceanic crust of an age between 32 and 18 Ma. Further, we propose (3) that at different heat sources at the slow-spreading Gakkel Ridge in the Aurora Vent Field region might explain the geothermal heat flow distribution. We conclude that in situ observations are urgently required to ground-truth and fine-tune existing models and that a multidisciplinary approach is of high importance for the scientific community’s understanding of this parameter Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Arctic Arctic Arctic Ocean Ice Sheet Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Arctic Antarctic The Antarctic Arctic Ocean Antarctic Peninsula Gakkel Ridge ENVELOPE(90.000,90.000,87.000,87.000) Powell Basin ENVELOPE(-49.500,-49.500,-62.250,-62.250) Geosciences 11 1 11 |
institution |
Open Polar |
collection |
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
The thermal state of the lithosphere and related geothermal heat flow (GHF) is a crucial parameter to understand a variety of processes related to cryospheric, geospheric, and/or biospheric interactions. Indirect estimates of GHF in polar regions from magnetic, seismological, or petrological data often show large discrepancies when compared to thermal in situ observations. Here, the lack of in situ data represents a fundamental limitation for both investigating thermal processes of the lithosphere and validating indirect heat flow estimates. During RV Polarstern expeditions PS86 and PS118, we obtained in situ thermal measurements and present the derived GHF in key regions, such as the Antarctic Peninsula and the Gakkel Ridge in the Arctic. By comparison with indirect models, our results indicate (1) elevated geothermal heat flow (75 ± 5 mW m−2 to 139 ± 26 mW m−2) to the west of the Antarctic Peninsula, which should be considered for future investigations of ice-sheet dynamics and the visco-elastic behavior of the crust. (2) The thermal signature of the Powell Basin characteristic for oceanic crust of an age between 32 and 18 Ma. Further, we propose (3) that at different heat sources at the slow-spreading Gakkel Ridge in the Aurora Vent Field region might explain the geothermal heat flow distribution. We conclude that in situ observations are urgently required to ground-truth and fine-tune existing models and that a multidisciplinary approach is of high importance for the scientific community’s understanding of this parameter |
format |
Article in Journal/Newspaper |
author |
Dziadek, Ricarda Doll, Mechthild Warnke, Fynn Schlindwein, Vera |
spellingShingle |
Dziadek, Ricarda Doll, Mechthild Warnke, Fynn Schlindwein, Vera Towards Closing the Polar Gap: New Marine Heat Flow Observations in Antarctica and the Arctic Ocean |
author_facet |
Dziadek, Ricarda Doll, Mechthild Warnke, Fynn Schlindwein, Vera |
author_sort |
Dziadek, Ricarda |
title |
Towards Closing the Polar Gap: New Marine Heat Flow Observations in Antarctica and the Arctic Ocean |
title_short |
Towards Closing the Polar Gap: New Marine Heat Flow Observations in Antarctica and the Arctic Ocean |
title_full |
Towards Closing the Polar Gap: New Marine Heat Flow Observations in Antarctica and the Arctic Ocean |
title_fullStr |
Towards Closing the Polar Gap: New Marine Heat Flow Observations in Antarctica and the Arctic Ocean |
title_full_unstemmed |
Towards Closing the Polar Gap: New Marine Heat Flow Observations in Antarctica and the Arctic Ocean |
title_sort |
towards closing the polar gap: new marine heat flow observations in antarctica and the arctic ocean |
publisher |
MDPI |
publishDate |
2020 |
url |
https://epic.awi.de/id/eprint/53485/ https://doi.org/10.3390/geosciences11010011 https://hdl.handle.net/10013/epic.3be087b0-9585-4576-806c-8fbd599fb79c |
long_lat |
ENVELOPE(90.000,90.000,87.000,87.000) ENVELOPE(-49.500,-49.500,-62.250,-62.250) |
geographic |
Arctic Antarctic The Antarctic Arctic Ocean Antarctic Peninsula Gakkel Ridge Powell Basin |
geographic_facet |
Arctic Antarctic The Antarctic Arctic Ocean Antarctic Peninsula Gakkel Ridge Powell Basin |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Arctic Arctic Arctic Ocean Ice Sheet |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Arctic Arctic Arctic Ocean Ice Sheet |
op_source |
EPIC3Geosciences, MDPI, 11(1), pp. 1-19, ISSN: 2076-3263 |
op_relation |
Dziadek, R. orcid:0000-0001-8689-9181 , Doll, M. , Warnke, F. orcid:0000-0002-7477-5058 and Schlindwein, V. orcid:0000-0001-5570-2753 (2020) Towards Closing the Polar Gap: New Marine Heat Flow Observations in Antarctica and the Arctic Ocean , Geosciences, 11 (1), pp. 1-19 . doi:10.3390/geosciences11010011 <https://doi.org/10.3390/geosciences11010011> , hdl:10013/epic.3be087b0-9585-4576-806c-8fbd599fb79c |
op_doi |
https://doi.org/10.3390/geosciences11010011 |
container_title |
Geosciences |
container_volume |
11 |
container_issue |
1 |
container_start_page |
11 |
_version_ |
1766222331824308224 |