Geomagnetic secular variation of Bransfield Strait (Western Antarctica) from analysis of marine crossover data
Tracking the secular variation of the geomagnetic field in the past is severely limited in some cases by factors relating to the remoteness of the sites. This is maximal in the Antarctic where the remote location and severe climate lead to logistic limitations that make it difficult to keep a contin...
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ftunivcmadrid:oai:www.ucm.es:6030 2023-05-15T14:02:59+02:00 Geomagnetic secular variation of Bransfield Strait (Western Antarctica) from analysis of marine crossover data Catalán, Manuel Agudo, Luis Miguel Muñoz Martín, Alfonso 2005-11-16 application/pdf https://eprints.ucm.es/id/eprint/6030/ https://eprints.ucm.es/id/eprint/6030/1/crossover_Catalan.pdf http://www.blackwellpublishing.com/journal.asp?ref=0956-540X&site=1 es spa Oxford University Press https://eprints.ucm.es/id/eprint/6030/1/crossover_Catalan.pdf info:eu-repo/semantics/openAccess Geofísica Geodinámica info:eu-repo/semantics/article PeerReviewed 2005 ftunivcmadrid 2022-05-12T19:47:58Z Tracking the secular variation of the geomagnetic field in the past is severely limited in some cases by factors relating to the remoteness of the sites. This is maximal in the Antarctic where the remote location and severe climate lead to logistic limitations that make it difficult to keep a continuous record of magnetic field variations. From the magnetic information available from historical marine expeditions, it is possible to infer this time-varying component from the comparison of readings at crossovers. This study focuses on this technique, discusses the impact of the different error sources and proposes a simple mathematical procedure to infer average secular variation rates. The result is validated by comparing it with local data from the Arctowski and Livingston magnetic observatories, sited in the area. Additionally, using a high-quality data set from a local area in the neighbourhood of Deception Island, we have detected a systematic distribution in its secular variation. This dichotomy has been interpreted in terms of a volcano-magnetic signal. This fact and the nature of its principal mechanisms are analysed and discussed. Article in Journal/Newspaper Antarc* Antarctic Antarctica Bransfield Strait Deception Island Universidad Complutense de Madrid (UCM): E-Prints Complutense Antarctic Arctowski ENVELOPE(-58.467,-58.467,-62.167,-62.167) Bransfield Strait Deception Island ENVELOPE(-60.633,-60.633,-62.950,-62.950) The Antarctic |
institution |
Open Polar |
collection |
Universidad Complutense de Madrid (UCM): E-Prints Complutense |
op_collection_id |
ftunivcmadrid |
language |
Spanish |
topic |
Geofísica Geodinámica |
spellingShingle |
Geofísica Geodinámica Catalán, Manuel Agudo, Luis Miguel Muñoz Martín, Alfonso Geomagnetic secular variation of Bransfield Strait (Western Antarctica) from analysis of marine crossover data |
topic_facet |
Geofísica Geodinámica |
description |
Tracking the secular variation of the geomagnetic field in the past is severely limited in some cases by factors relating to the remoteness of the sites. This is maximal in the Antarctic where the remote location and severe climate lead to logistic limitations that make it difficult to keep a continuous record of magnetic field variations. From the magnetic information available from historical marine expeditions, it is possible to infer this time-varying component from the comparison of readings at crossovers. This study focuses on this technique, discusses the impact of the different error sources and proposes a simple mathematical procedure to infer average secular variation rates. The result is validated by comparing it with local data from the Arctowski and Livingston magnetic observatories, sited in the area. Additionally, using a high-quality data set from a local area in the neighbourhood of Deception Island, we have detected a systematic distribution in its secular variation. This dichotomy has been interpreted in terms of a volcano-magnetic signal. This fact and the nature of its principal mechanisms are analysed and discussed. |
format |
Article in Journal/Newspaper |
author |
Catalán, Manuel Agudo, Luis Miguel Muñoz Martín, Alfonso |
author_facet |
Catalán, Manuel Agudo, Luis Miguel Muñoz Martín, Alfonso |
author_sort |
Catalán, Manuel |
title |
Geomagnetic secular variation of Bransfield Strait (Western Antarctica) from analysis of marine crossover data |
title_short |
Geomagnetic secular variation of Bransfield Strait (Western Antarctica) from analysis of marine crossover data |
title_full |
Geomagnetic secular variation of Bransfield Strait (Western Antarctica) from analysis of marine crossover data |
title_fullStr |
Geomagnetic secular variation of Bransfield Strait (Western Antarctica) from analysis of marine crossover data |
title_full_unstemmed |
Geomagnetic secular variation of Bransfield Strait (Western Antarctica) from analysis of marine crossover data |
title_sort |
geomagnetic secular variation of bransfield strait (western antarctica) from analysis of marine crossover data |
publisher |
Oxford University Press |
publishDate |
2005 |
url |
https://eprints.ucm.es/id/eprint/6030/ https://eprints.ucm.es/id/eprint/6030/1/crossover_Catalan.pdf http://www.blackwellpublishing.com/journal.asp?ref=0956-540X&site=1 |
long_lat |
ENVELOPE(-58.467,-58.467,-62.167,-62.167) ENVELOPE(-60.633,-60.633,-62.950,-62.950) |
geographic |
Antarctic Arctowski Bransfield Strait Deception Island The Antarctic |
geographic_facet |
Antarctic Arctowski Bransfield Strait Deception Island The Antarctic |
genre |
Antarc* Antarctic Antarctica Bransfield Strait Deception Island |
genre_facet |
Antarc* Antarctic Antarctica Bransfield Strait Deception Island |
op_relation |
https://eprints.ucm.es/id/eprint/6030/1/crossover_Catalan.pdf |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1766273444070031360 |