Sources of the Geomagnetic Field and the Modern Data That EnableTheir Investigation

Nils Olsen, Gauthier Hulot and Terence J. Sabaka
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Gauthier Hulot: Institut de Physique du Globe de Paris, Institut de recherche associé au CNRS et á l’Université, Equipe de Géomagnétisme
Terence J. Sabaka: Planetary Geodynamics Laboratory, Code 698

Chapter 5 in Handbook of Geomathematics, 2010, pp 105-124 from Springer

Abstract: Abstract The geomagnetic field one can measure at the Earth’s surface or on board satellites is the sum of contributions from many different sources. These sources have different physical origins and can be found both below (in the form of electrical currents and magnetized material) and above (only in the form of electrical currents) the Earth’s surface. Each source happens to produce a contribution with rather specific spatiotemporal properties. This fortunate situation is what makes the identification and investigation of the contribution of each source possible, provided appropriate observational data sets are available and analyzed in an adequate way, to produce the so-called geomagnetic field models. Here a general overview of the various sources that contribute to the observed geomagnetic field, and of the modern data that enable their investigation via such procedures is provided.

Keywords: Satellite Data; Remanent Magnetization; Equatorial Electrojet; Spherical Harmonic Degree; Core Field (search for similar items in EconPapers)
Date: 2010
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Persistent link: https://EconPapers.repec.org/RePEc:spr:sprchp:978-3-642-01546-5_5

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DOI: 10.1007/978-3-642-01546-5_5

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