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Rapid Variations of Earth’s Core Magnetic Field

Abstract : Abstract Evidence of fast variations in the Earth’s core field are seen both in magnetic observatory and satellite records. We present here how they have been identified at the Earth’s surface from ground-based observatory records and how their spatio-temporal structure is now characterised by satellite data. It is shown how their properties at the core mantle boundary are extracted through localised and global modelling processes, paying particular attention to their time scales. Finally are listed possible types of waves in the liquid outer core, together with their main properties, that may give rise to these observed fast variations.
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https://hal-insu.archives-ouvertes.fr/insu-03525969
Contributor : Vincent Lesur Connect in order to contact the contributor
Submitted on : Friday, January 14, 2022 - 11:34:17 AM
Last modification on : Sunday, January 16, 2022 - 3:30:48 AM

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Distributed under a Creative Commons Attribution 4.0 International License

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V. Lesur, N. Gillet, M. Hammer, M. Mandea. Rapid Variations of Earth’s Core Magnetic Field. Surveys in Geophysics, Springer Verlag (Germany), 2022, ⟨10.1007/s10712-021-09662-4⟩. ⟨insu-03525969⟩

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