A model of the secular change of the geomagnetic field for Antarctica

9 pages, 11 figures, 1 table.-- Available online Nov 7, 2001. An improved model of geomagnetic secular change for the Antarctic was developed using observatory annual mean values measured in Antarctica during the last 40 years. Spherical cap harmonic analysis (SCHA) with a power series time dependen...

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Bibliographic Details
Published in:Tectonophysics
Main Authors: Torta, Joan Miquel, De Santis, A., Chiappini, M., Frese, R. R. B. von
Format: Article in Journal/Newspaper
Language:English
Published: Elsevier 2002
Subjects:
Antarctica
Spherical cap harmonic analysis
Magnetic surveys
Magnetic mapping
Geomagnetic secular variation
Antarctic
The Antarctic
Antarc*
Antártida
Antartide
Online Access:http://hdl.handle.net/10261/12895
https://doi.org/10.1016/S0040-1951(01)00244-X
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Summary:9 pages, 11 figures, 1 table.-- Available online Nov 7, 2001. An improved model of geomagnetic secular change for the Antarctic was developed using observatory annual mean values measured in Antarctica during the last 40 years. Spherical cap harmonic analysis (SCHA) with a power series time dependence was used to model spatial and temporal variations of main field differences at spatial wavelengths from 3000 to 13,000 km. The model was designed to facilitate merging satellite, airborne, marine and terrestrial magnetic data sets recorded at very different epochs in the Antarctic where significant annual geomagnetic changes have occurred. It improves the fit to observatory data by up to about 50% relative to the International Geomagnetic Reference Field. This research was partially funded by the Italian Programma Nazionale di Ricerche in Antartide (PNRA) and by the Spanish Programa Nacional de Investigación en la Antártida (PNIA, CICYT, Project No. ANT98-0886). Peer reviewed

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