Improved magnetic anomalies of the Antarctic lithosphere from satellite and near-surface data
The Antarctic magnetic anomaly map compiled marine and airborne surveys collected south of 60 degrees S through 1999 and used Magsat data to help fill in the regional gaps between the surveys. Orsted and CHAMP satellite magnetic observations with greatly improved measurement accuracies and temporal...
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Online Access: | http://nora.nerc.ac.uk/id/eprint/11766/ |
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ftnerc:oai:nora.nerc.ac.uk:11766 2024-02-11T09:57:53+01:00 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 2007 http://nora.nerc.ac.uk/id/eprint/11766/ unknown Blackwell Kim, Hyung Rae; von Frese, Ralph R.B.; Taylor, Patrick T.; Golynsky, Alexander V.; Gaya-Piqué, Luis R.; Ferraccioli, Fausto orcid:0000-0002-9347-4736 . 2007 Improved magnetic anomalies of the Antarctic lithosphere from satellite and near-surface data. Geophysical Journal International, 171 (1). 119-126. https://doi.org/10.1111/j.1365-246X.2007.03516.x <https://doi.org/10.1111/j.1365-246X.2007.03516.x> Earth Sciences Electronics Engineering and Technology Publication - Article PeerReviewed 2007 ftnerc https://doi.org/10.1111/j.1365-246X.2007.03516.x 2024-01-12T00:03:13Z The Antarctic magnetic anomaly map compiled marine and airborne surveys collected south of 60 degrees S through 1999 and used Magsat data to help fill in the regional gaps between the surveys. Orsted 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 Natural Environment Research Council: NERC Open Research Archive Antarctic The Antarctic Geophysical Journal International 171 1 119 126 |
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Open Polar |
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Natural Environment Research Council: NERC Open Research Archive |
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ftnerc |
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unknown |
topic |
Earth Sciences Electronics Engineering and Technology |
spellingShingle |
Earth Sciences Electronics Engineering and Technology 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 |
Earth Sciences Electronics Engineering and Technology |
description |
The Antarctic magnetic anomaly map compiled marine and airborne surveys collected south of 60 degrees S through 1999 and used Magsat data to help fill in the regional gaps between the surveys. Orsted 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. |
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 |
Blackwell |
publishDate |
2007 |
url |
http://nora.nerc.ac.uk/id/eprint/11766/ |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
Kim, Hyung Rae; von Frese, Ralph R.B.; Taylor, Patrick T.; Golynsky, Alexander V.; Gaya-Piqué, Luis R.; Ferraccioli, Fausto orcid:0000-0002-9347-4736 . 2007 Improved magnetic anomalies of the Antarctic lithosphere from satellite and near-surface data. Geophysical Journal International, 171 (1). 119-126. https://doi.org/10.1111/j.1365-246X.2007.03516.x <https://doi.org/10.1111/j.1365-246X.2007.03516.x> |
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_ |
1790593435057520640 |