Improved magnetic anomalies of the Antarctic lithosphere from satellite and near-surface data
International audience The Antarctic magnetic anomaly map compiled marine and airborne surveys collected south of 60°S through 1999 and used Magsat data to help fill in the regional gaps between the surveys. Ørsted and CHAMP satellite magnetic observations with greatly improved measurement accuracie...
Published in: | Geophysical Journal International |
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ftunivparis:oai:HAL:insu-03603176v1 2023-06-11T04:05:50+02:00 Improved magnetic anomalies of the Antarctic lithosphere from satellite and near-surface data Kim, Hyung Rae von Frese, Ralph R. B. Taylor, Patrick T. Golynsky, Alexander V. Gaya-Piqué, Luis R. Ferraccioli, Fausto Institut de Physique du Globe de Paris (IPGP) Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Université de La Réunion (UR)-Institut de Physique du Globe de Paris (IPG Paris)-Centre National de la Recherche Scientifique (CNRS) 2007 https://hal-insu.archives-ouvertes.fr/insu-03603176 https://hal-insu.archives-ouvertes.fr/insu-03603176/document https://hal-insu.archives-ouvertes.fr/insu-03603176/file/171-1-119.pdf https://doi.org/10.1111/j.1365-246X.2007.03516.x en eng HAL CCSD Oxford University Press (OUP) info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1365-246X.2007.03516.x insu-03603176 https://hal-insu.archives-ouvertes.fr/insu-03603176 https://hal-insu.archives-ouvertes.fr/insu-03603176/document https://hal-insu.archives-ouvertes.fr/insu-03603176/file/171-1-119.pdf BIBCODE: 2007GeoJI.171.119K doi:10.1111/j.1365-246X.2007.03516.x http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 0956-540X EISSN: 1365-246X Geophysical Journal International https://hal-insu.archives-ouvertes.fr/insu-03603176 Geophysical Journal International, 2007, 171, pp.119-126. ⟨10.1111/j.1365-246X.2007.03516.x⟩ ADMAP Antarctic magnetic anomalies near-surface surveys satellite surveys [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2007 ftunivparis https://doi.org/10.1111/j.1365-246X.2007.03516.x 2023-04-26T16:21:35Z International audience The Antarctic magnetic anomaly map compiled marine and airborne surveys collected south of 60°S through 1999 and used Magsat data to help fill in the regional gaps between the surveys. Ørsted and CHAMP satellite magnetic observations with greatly improved measurement accuracies and temporal and spatial coverage of the Antarctic, have now supplanted the Magsat data. We combined the new satellite observations with the near-surface survey data for an improved magnetic anomaly map of the Antarctic lithosphere. Specifically, we separated the crustal from the core and external field components in the satellite data using crustal thickness variations estimated from the terrain and the satellite-derived free-air gravity observations. Regional gaps in the near-surface surveys were then filled with predictions from crustal magnetization models that jointly satisfied the near-surface and satellite crustal anomalies. Comparisons in some of the regional gaps that also considered newly acquired aeromagnetic data demonstrated the enhanced anomaly estimation capabilities of the predictions over those from conventional minimum curvature and spherical harmonic geomagnetic field models. We also noted that the growing number of regional and world magnetic survey compilations involve coverage gaps where these procedures can contribute effective near-surface crustal anomaly estimates. Article in Journal/Newspaper Antarc* Antarctic Université de Paris: Portail HAL Antarctic The Antarctic Geophysical Journal International 171 1 119 126 |
institution |
Open Polar |
collection |
Université de Paris: Portail HAL |
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ftunivparis |
language |
English |
topic |
ADMAP Antarctic magnetic anomalies near-surface surveys satellite surveys [SDU]Sciences of the Universe [physics] |
spellingShingle |
ADMAP Antarctic magnetic anomalies near-surface surveys satellite surveys [SDU]Sciences of the Universe [physics] Kim, Hyung Rae von Frese, Ralph R. B. Taylor, Patrick T. Golynsky, Alexander V. Gaya-Piqué, Luis R. Ferraccioli, Fausto Improved magnetic anomalies of the Antarctic lithosphere from satellite and near-surface data |
topic_facet |
ADMAP Antarctic magnetic anomalies near-surface surveys satellite surveys [SDU]Sciences of the Universe [physics] |
description |
International audience The Antarctic magnetic anomaly map compiled marine and airborne surveys collected south of 60°S through 1999 and used Magsat data to help fill in the regional gaps between the surveys. Ørsted and CHAMP satellite magnetic observations with greatly improved measurement accuracies and temporal and spatial coverage of the Antarctic, have now supplanted the Magsat data. We combined the new satellite observations with the near-surface survey data for an improved magnetic anomaly map of the Antarctic lithosphere. Specifically, we separated the crustal from the core and external field components in the satellite data using crustal thickness variations estimated from the terrain and the satellite-derived free-air gravity observations. Regional gaps in the near-surface surveys were then filled with predictions from crustal magnetization models that jointly satisfied the near-surface and satellite crustal anomalies. Comparisons in some of the regional gaps that also considered newly acquired aeromagnetic data demonstrated the enhanced anomaly estimation capabilities of the predictions over those from conventional minimum curvature and spherical harmonic geomagnetic field models. We also noted that the growing number of regional and world magnetic survey compilations involve coverage gaps where these procedures can contribute effective near-surface crustal anomaly estimates. |
author2 |
Institut de Physique du Globe de Paris (IPGP) Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Université de La Réunion (UR)-Institut de Physique du Globe de Paris (IPG Paris)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Kim, Hyung Rae von Frese, Ralph R. B. Taylor, Patrick T. Golynsky, Alexander V. Gaya-Piqué, Luis R. Ferraccioli, Fausto |
author_facet |
Kim, Hyung Rae von Frese, Ralph R. B. Taylor, Patrick T. Golynsky, Alexander V. Gaya-Piqué, Luis R. Ferraccioli, Fausto |
author_sort |
Kim, Hyung Rae |
title |
Improved magnetic anomalies of the Antarctic lithosphere from satellite and near-surface data |
title_short |
Improved magnetic anomalies of the Antarctic lithosphere from satellite and near-surface data |
title_full |
Improved magnetic anomalies of the Antarctic lithosphere from satellite and near-surface data |
title_fullStr |
Improved magnetic anomalies of the Antarctic lithosphere from satellite and near-surface data |
title_full_unstemmed |
Improved magnetic anomalies of the Antarctic lithosphere from satellite and near-surface data |
title_sort |
improved magnetic anomalies of the antarctic lithosphere from satellite and near-surface data |
publisher |
HAL CCSD |
publishDate |
2007 |
url |
https://hal-insu.archives-ouvertes.fr/insu-03603176 https://hal-insu.archives-ouvertes.fr/insu-03603176/document https://hal-insu.archives-ouvertes.fr/insu-03603176/file/171-1-119.pdf https://doi.org/10.1111/j.1365-246X.2007.03516.x |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
ISSN: 0956-540X EISSN: 1365-246X Geophysical Journal International https://hal-insu.archives-ouvertes.fr/insu-03603176 Geophysical Journal International, 2007, 171, pp.119-126. ⟨10.1111/j.1365-246X.2007.03516.x⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1365-246X.2007.03516.x insu-03603176 https://hal-insu.archives-ouvertes.fr/insu-03603176 https://hal-insu.archives-ouvertes.fr/insu-03603176/document https://hal-insu.archives-ouvertes.fr/insu-03603176/file/171-1-119.pdf BIBCODE: 2007GeoJI.171.119K doi:10.1111/j.1365-246X.2007.03516.x |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1111/j.1365-246X.2007.03516.x |
container_title |
Geophysical Journal International |
container_volume |
171 |
container_issue |
1 |
container_start_page |
119 |
op_container_end_page |
126 |
_version_ |
1768377501049946112 |