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

In: Handbook of Geomathematics

Author

Listed:
  • Nils Olsen
  • 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)

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.

Suggested Citation

  • Nils Olsen & Gauthier Hulot & Terence J. Sabaka, 2010. "Sources of the Geomagnetic Field and the Modern Data That EnableTheir Investigation," Springer Books, in: Willi Freeden & M. Zuhair Nashed & Thomas Sonar (ed.), Handbook of Geomathematics, chapter 5, pages 105-124, Springer.
    • Handle: RePEc:spr:sprchp:978-3-642-01546-5_5
    DOI: 10.1007/978-3-642-01546-5_5
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