Crustal thickness of Antarctica estimated using data from gravimetric satellites
Computing a better crustal thickness model is still a necessary improvement in Antarctica. In this remote continent where almost all the bedrock is covered by the ice sheet, seismic investigations do not reach a sufficient spatial resolution for geological and geophysical purposes. Here, we present...
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ftdoajarticles:oai:doaj.org/article:293c65615b7446a78891e285f3eb0013 2023-05-15T13:33:51+02:00 Crustal thickness of Antarctica estimated using data from gravimetric satellites M. Llubes L. Seoane S. Bruinsma F. Rémy 2018-04-01T00:00:00Z https://doi.org/10.5194/se-9-457-2018 https://doaj.org/article/293c65615b7446a78891e285f3eb0013 EN eng Copernicus Publications https://www.solid-earth.net/9/457/2018/se-9-457-2018.pdf https://doaj.org/toc/1869-9510 https://doaj.org/toc/1869-9529 doi:10.5194/se-9-457-2018 1869-9510 1869-9529 https://doaj.org/article/293c65615b7446a78891e285f3eb0013 Solid Earth, Vol 9, Pp 457-467 (2018) Geology QE1-996.5 Stratigraphy QE640-699 article 2018 ftdoajarticles https://doi.org/10.5194/se-9-457-2018 2022-12-31T01:02:28Z Computing a better crustal thickness model is still a necessary improvement in Antarctica. In this remote continent where almost all the bedrock is covered by the ice sheet, seismic investigations do not reach a sufficient spatial resolution for geological and geophysical purposes. Here, we present a global map of Antarctic crustal thickness computed from space gravity observations. The DIR5 gravity field model, built from GOCE and GRACE gravimetric data, is inverted with the Parker–Oldenburg iterative algorithm. The BEDMAP products are used to estimate the gravity effect of the ice and the rocky surface. Our result is compared to crustal thickness calculated from seismological studies and the CRUST1.0 and AN1 models. Although the CRUST1.0 model shows a very good agreement with ours, its spatial resolution is larger than the one we obtain with gravimetric data. Finally, we compute a model in which the crust–mantle density contrast is adjusted to fit the Moho depth from the CRUST1.0 model. In East Antarctica, the resulting density contrast clearly shows higher values than in West Antarctica. Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica Ice Sheet West Antarctica Directory of Open Access Journals: DOAJ Articles Antarctic East Antarctica West Antarctica Oldenburg Solid Earth 9 2 457 467 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Geology QE1-996.5 Stratigraphy QE640-699 |
spellingShingle |
Geology QE1-996.5 Stratigraphy QE640-699 M. Llubes L. Seoane S. Bruinsma F. Rémy Crustal thickness of Antarctica estimated using data from gravimetric satellites |
topic_facet |
Geology QE1-996.5 Stratigraphy QE640-699 |
description |
Computing a better crustal thickness model is still a necessary improvement in Antarctica. In this remote continent where almost all the bedrock is covered by the ice sheet, seismic investigations do not reach a sufficient spatial resolution for geological and geophysical purposes. Here, we present a global map of Antarctic crustal thickness computed from space gravity observations. The DIR5 gravity field model, built from GOCE and GRACE gravimetric data, is inverted with the Parker–Oldenburg iterative algorithm. The BEDMAP products are used to estimate the gravity effect of the ice and the rocky surface. Our result is compared to crustal thickness calculated from seismological studies and the CRUST1.0 and AN1 models. Although the CRUST1.0 model shows a very good agreement with ours, its spatial resolution is larger than the one we obtain with gravimetric data. Finally, we compute a model in which the crust–mantle density contrast is adjusted to fit the Moho depth from the CRUST1.0 model. In East Antarctica, the resulting density contrast clearly shows higher values than in West Antarctica. |
format |
Article in Journal/Newspaper |
author |
M. Llubes L. Seoane S. Bruinsma F. Rémy |
author_facet |
M. Llubes L. Seoane S. Bruinsma F. Rémy |
author_sort |
M. Llubes |
title |
Crustal thickness of Antarctica estimated using data from gravimetric satellites |
title_short |
Crustal thickness of Antarctica estimated using data from gravimetric satellites |
title_full |
Crustal thickness of Antarctica estimated using data from gravimetric satellites |
title_fullStr |
Crustal thickness of Antarctica estimated using data from gravimetric satellites |
title_full_unstemmed |
Crustal thickness of Antarctica estimated using data from gravimetric satellites |
title_sort |
crustal thickness of antarctica estimated using data from gravimetric satellites |
publisher |
Copernicus Publications |
publishDate |
2018 |
url |
https://doi.org/10.5194/se-9-457-2018 https://doaj.org/article/293c65615b7446a78891e285f3eb0013 |
geographic |
Antarctic East Antarctica West Antarctica Oldenburg |
geographic_facet |
Antarctic East Antarctica West Antarctica Oldenburg |
genre |
Antarc* Antarctic Antarctica East Antarctica Ice Sheet West Antarctica |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica Ice Sheet West Antarctica |
op_source |
Solid Earth, Vol 9, Pp 457-467 (2018) |
op_relation |
https://www.solid-earth.net/9/457/2018/se-9-457-2018.pdf https://doaj.org/toc/1869-9510 https://doaj.org/toc/1869-9529 doi:10.5194/se-9-457-2018 1869-9510 1869-9529 https://doaj.org/article/293c65615b7446a78891e285f3eb0013 |
op_doi |
https://doi.org/10.5194/se-9-457-2018 |
container_title |
Solid Earth |
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9 |
container_issue |
2 |
container_start_page |
457 |
op_container_end_page |
467 |
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1766046536074002432 |