Naslov
Geomagnetic Jerks : Rapid Core Field Variations and Core Dynamics

Autori
Mandea, Mioara ; Holme, Richard ; Pais, Alexandra ; Pinheiro, Katia ; Jackson, Andrew ; Verbanac, Giuliana

Vrsta, podvrsta i kategorija rada
Poglavlja u knjigama, znanstveni

Knjiga
Terrestrial Magnetism

Urednik/ci
Hulot, G., Balogh, A., Christensen, U.R., Constable, C., Mandea, M., Olsen, N.

Izdavač
Springer

Grad
New York (NY)

Godina
2011

Raspon stranica
147-175

ISBN
978-1-4419-7954-4

Ključne riječi
Core field , Secular variation , Geomagnetic jerks, Core flows

Sažetak
The secular variation of the core field is generally characterized by smooth vari- ations, sometimes interrupted by abrupt changes, named geomagnetic jerks. The origin of these events, observed and investigated for over three decades, is still not fully understood. Many fundamental features of geomagnetic jerks have been the subject of debate, including their origin internal or external to the Earth, their occurrence dates, their duration and their global or regional character. Specific tools have been developed to detect them in geomag- netic field or secular variation time series. Recently, their investigation has been advanced by the availability of a decade of high-quality satellite measurements. Moreover, advances in the modelling of the core field and its variations have brought new perspectives on the fluid motion at the top of the core, and opened new avenues in our search for the origin of geomagnetic jerks. Correlations have been proposed between geomagnetic jerks and some other geophysical observables, indicating the substantial interest in this topic in our sci- entific community.

Izvorni jezik
Engleski

Znanstvena područja
Geologija

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