A new approach to assess isostatic compensation of topography in continental domain from GOCE gravity gradients
International audience Estimating how topography is maintained provides insights into the different factors responsible for surface deformations and their relative roles. Here, we develop a new and simple approach to assess the degree of isostatic compensation of continental topography at regional s...
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Online Access: | https://hal.science/hal-01467540 https://hal.science/hal-01467540/document https://hal.science/hal-01467540/file/cadioGJI2016.pdf https://doi.org/10.1093/gji/ggw281 |
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ftinsu:oai:HAL:hal-01467540v1 2023-06-18T03:42:20+02:00 A new approach to assess isostatic compensation of topography in continental domain from GOCE gravity gradients Cadio, Cecilia Saraswati, Anita Cattin, Rodolphe Mazzotti, Stephane Géosciences Montpellier Institut national des sciences de l'Univers (INSU - CNRS)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA) 2016-11 https://hal.science/hal-01467540 https://hal.science/hal-01467540/document https://hal.science/hal-01467540/file/cadioGJI2016.pdf https://doi.org/10.1093/gji/ggw281 en eng HAL CCSD Oxford University Press (OUP) info:eu-repo/semantics/altIdentifier/doi/10.1093/gji/ggw281 hal-01467540 https://hal.science/hal-01467540 https://hal.science/hal-01467540/document https://hal.science/hal-01467540/file/cadioGJI2016.pdf doi:10.1093/gji/ggw281 info:eu-repo/semantics/OpenAccess ISSN: 0956-540X EISSN: 1365-246X Geophysical Journal International https://hal.science/hal-01467540 Geophysical Journal International, 2016, 207 (2), pp.645-654. ⟨10.1093/gji/ggw281⟩ Satellite geodesy Gravity anomalies and Earth structure Continental margins: convergent North America Numerical approximations and analysis [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [SDE.MCG]Environmental Sciences/Global Changes info:eu-repo/semantics/article Journal articles 2016 ftinsu https://doi.org/10.1093/gji/ggw281 2023-06-06T00:49:47Z International audience Estimating how topography is maintained provides insights into the different factors responsible for surface deformations and their relative roles. Here, we develop a new and simple approach to assess the degree of isostatic compensation of continental topography at regional scale from GOCE gravity gradients. We calculate the ratio between the radial gradient observed by GOCE and that calculated from topography only. From analytical and statistical formulations, simple relationships between this ratio and the degree of compensation are obtained under the Airy–Heiskanen isostasy hypothesis. Then, a value of degree of compensation at each point of study area can be easily deduced. We apply our method to the Alaska-Canada Cordillera and validate our results by comparison with a standard isostatic gravity anomaly model and additional geophysical information for this area. Both our GOCE-based results and the isostatic anomaly show that Airy–Heiskanen isostasy prevails for the Yukon Plateau whereas additional mechanisms are required to support topography below the Northwest Territories Craton and the Yakutat collision zone. Article in Journal/Newspaper Northwest Territories Yakutat Alaska Yukon Institut national des sciences de l'Univers: HAL-INSU Canada Northwest Territories Yukon Yukon Plateau ENVELOPE(-137.254,-137.254,62.249,62.249) Geophysical Journal International 207 2 645 654 |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
Satellite geodesy Gravity anomalies and Earth structure Continental margins: convergent North America Numerical approximations and analysis [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [SDE.MCG]Environmental Sciences/Global Changes |
spellingShingle |
Satellite geodesy Gravity anomalies and Earth structure Continental margins: convergent North America Numerical approximations and analysis [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [SDE.MCG]Environmental Sciences/Global Changes Cadio, Cecilia Saraswati, Anita Cattin, Rodolphe Mazzotti, Stephane A new approach to assess isostatic compensation of topography in continental domain from GOCE gravity gradients |
topic_facet |
Satellite geodesy Gravity anomalies and Earth structure Continental margins: convergent North America Numerical approximations and analysis [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [SDE.MCG]Environmental Sciences/Global Changes |
description |
International audience Estimating how topography is maintained provides insights into the different factors responsible for surface deformations and their relative roles. Here, we develop a new and simple approach to assess the degree of isostatic compensation of continental topography at regional scale from GOCE gravity gradients. We calculate the ratio between the radial gradient observed by GOCE and that calculated from topography only. From analytical and statistical formulations, simple relationships between this ratio and the degree of compensation are obtained under the Airy–Heiskanen isostasy hypothesis. Then, a value of degree of compensation at each point of study area can be easily deduced. We apply our method to the Alaska-Canada Cordillera and validate our results by comparison with a standard isostatic gravity anomaly model and additional geophysical information for this area. Both our GOCE-based results and the isostatic anomaly show that Airy–Heiskanen isostasy prevails for the Yukon Plateau whereas additional mechanisms are required to support topography below the Northwest Territories Craton and the Yakutat collision zone. |
author2 |
Géosciences Montpellier Institut national des sciences de l'Univers (INSU - CNRS)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA) |
format |
Article in Journal/Newspaper |
author |
Cadio, Cecilia Saraswati, Anita Cattin, Rodolphe Mazzotti, Stephane |
author_facet |
Cadio, Cecilia Saraswati, Anita Cattin, Rodolphe Mazzotti, Stephane |
author_sort |
Cadio, Cecilia |
title |
A new approach to assess isostatic compensation of topography in continental domain from GOCE gravity gradients |
title_short |
A new approach to assess isostatic compensation of topography in continental domain from GOCE gravity gradients |
title_full |
A new approach to assess isostatic compensation of topography in continental domain from GOCE gravity gradients |
title_fullStr |
A new approach to assess isostatic compensation of topography in continental domain from GOCE gravity gradients |
title_full_unstemmed |
A new approach to assess isostatic compensation of topography in continental domain from GOCE gravity gradients |
title_sort |
new approach to assess isostatic compensation of topography in continental domain from goce gravity gradients |
publisher |
HAL CCSD |
publishDate |
2016 |
url |
https://hal.science/hal-01467540 https://hal.science/hal-01467540/document https://hal.science/hal-01467540/file/cadioGJI2016.pdf https://doi.org/10.1093/gji/ggw281 |
long_lat |
ENVELOPE(-137.254,-137.254,62.249,62.249) |
geographic |
Canada Northwest Territories Yukon Yukon Plateau |
geographic_facet |
Canada Northwest Territories Yukon Yukon Plateau |
genre |
Northwest Territories Yakutat Alaska Yukon |
genre_facet |
Northwest Territories Yakutat Alaska Yukon |
op_source |
ISSN: 0956-540X EISSN: 1365-246X Geophysical Journal International https://hal.science/hal-01467540 Geophysical Journal International, 2016, 207 (2), pp.645-654. ⟨10.1093/gji/ggw281⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1093/gji/ggw281 hal-01467540 https://hal.science/hal-01467540 https://hal.science/hal-01467540/document https://hal.science/hal-01467540/file/cadioGJI2016.pdf doi:10.1093/gji/ggw281 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1093/gji/ggw281 |
container_title |
Geophysical Journal International |
container_volume |
207 |
container_issue |
2 |
container_start_page |
645 |
op_container_end_page |
654 |
_version_ |
1769008230489391104 |