Reference : Open magnetic flux and magnetic flux closure during sawtooth events
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
http://hdl.handle.net/2268/29194
Open magnetic flux and magnetic flux closure during sawtooth events
English
Hubert, Benoît mailto [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Labo de physique atmosphérique et planétaire (LPAP) >]
Milan, S. E. [> > > >]
Grocott, A. [> > > >]
Cowley, S. W. H. [> > > >]
Gérard, Jean-Claude mailto [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Labo de physique atmosphérique et planétaire (LPAP) >]
1-Dec-2008
Geophysical Research Letters
American Geophysical Union
35
23301
Yes (verified by ORBi)
International
0094-8276
Washington
DC
[en] Magnetospheric Physics: Magnetic reconnection (7526 ; 7835) ; Magnetospheric Physics: Auroral phenomena (2407) ; Magnetospheric Physics: Magnetic storms and substorms (7954) ; Magnetospheric Physics: Substorms ; Magnetospheric Physics: Solar wind/magnetosphere interactions
[en] We use IMAGE-FUV observations of the polar aurora and measurements of the ionospheric convection from the SuperDARN radar network to study several sawtooth events previously reported in the literature. We estimate the amount of open magnetic flux in the Earth magnetosphere during a significant part of these sawtooth intervals as well as the magnetic flux opening and closure rates, that is, the dayside and nightside reconnection rates. We find that during the sawtooth intervals the magnetosphere is highly loaded with open flux as a result of the strongly southward IMF carried by the solar wind during these intervals. The magnetosphere tries to relax to a less loaded configuration through a sequence of substorm expansions. However, these substorms do not necessarily evolve to their end before reintensification of nightside reconnection occurs in response to continued loading of the magnetosphere on the dayside.
Researchers ; Professionals ; Students
http://hdl.handle.net/2268/29194
10.1029/2008GL036374
http://adsabs.harvard.edu/abs/2008GeoRL..3523301H

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