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

J. M. Torta; A. De Santis; M. Chiappini; R. R.B. Von Frese

doi:10.1016/S0040-1951(01)00244-X

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

J. M. Torta, A. De Santis, M. Chiappini, R. R.B. Von Frese

Research output: Indexed journal article › Article › peer-review

9 Citations (Scopus)

Abstract

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 wavelenghts 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.

Original language	English
Pages (from-to)	179-187
Number of pages	9
Journal	Tectonophysics
Volume	347
Issue number	1-3
DOIs	https://doi.org/10.1016/S0040-1951(01)00244-X
Publication status	Published - 2002
Externally published	Yes

Keywords

Antarctica
Geomagnetic secular variation
Magnetic mapping
Magnetic surveys
Spherical cap harmonic analysis

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/S0040-1951(01)00244-X

Cite this

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title = "A model of the secular change of the geomagnetic field for Antarctica",

abstract = "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 wavelenghts 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.",

keywords = "Antarctica, Geomagnetic secular variation, Magnetic mapping, Magnetic surveys, Spherical cap harmonic analysis",

author = "Torta, {J. M.} and {De Santis}, A. and M. Chiappini and {Von Frese}, {R. R.B.}",

note = "Funding Information: The authors thank the Geological Survey of Canada for the codes to perform the SCHA by modeling main field differences, and G.V. Haines for correcting some bugs that appeared in the application of the code to a spherical cap at the South Pole. The observatory data were made available from the World Data Centre C1 for Geomagnetism (Edinburgh). The comments of J.M. Quinn, T.J. Sabaka and L. Newitt considerably improved the manuscript. This research was partially funded by the Italian Programma Nazionale di Ricerche in Antartide (PNRA) and by the Spanish Programa Nacional de Investigaci{\'o}n en la Ant{\'a}rtida (PNIA, CICYT, Project No. ANT98-0886).",

year = "2002",

doi = "10.1016/S0040-1951(01)00244-X",

language = "English",

volume = "347",

pages = "179--187",

journal = "Tectonophysics",

issn = "0040-1951",

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number = "1-3",

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T1 - A model of the secular change of the geomagnetic field for Antarctica

AU - Torta, J. M.

AU - De Santis, A.

AU - Chiappini, M.

AU - Von Frese, R. R.B.

N1 - Funding Information: The authors thank the Geological Survey of Canada for the codes to perform the SCHA by modeling main field differences, and G.V. Haines for correcting some bugs that appeared in the application of the code to a spherical cap at the South Pole. The observatory data were made available from the World Data Centre C1 for Geomagnetism (Edinburgh). The comments of J.M. Quinn, T.J. Sabaka and L. Newitt considerably improved the manuscript. 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).

PY - 2002

Y1 - 2002

N2 - 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 wavelenghts 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.

AB - 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 wavelenghts 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.

KW - Antarctica

KW - Geomagnetic secular variation

KW - Magnetic mapping

KW - Magnetic surveys

KW - Spherical cap harmonic analysis

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DO - 10.1016/S0040-1951(01)00244-X

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SN - 0040-1951

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SP - 179

EP - 187

JO - Tectonophysics

JF - Tectonophysics

IS - 1-3

ER -

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

Abstract

Keywords

UN SDGs

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