A simple model of the flux content of the distant magnetotail

Details A simple model of the flux content of the distant magnetotail A simple model of the flux content of the distant magnetotail

Jul 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004jgra..10907210m&link_type=abstract

Journal of Geophysical Research, Volume 109, Issue A7, CiteID A07210

Physics

11

Magnetospheric Physics: Magnetotail, Magnetospheric Physics: Magnetospheric Configuration And Dynamics, Magnetospheric Physics: Solar Wind/Magnetosphere Interactions, Magnetospheric Physics: Polar Cap Phenomena

Scientific paper

A simple model is presented which allows the profile of open flux within the magnetotail lobes to be determined from a knowledge of the present size of the polar cap and the past history of low-latitude and high-latitude dayside reconnection. The model shows that the nominal length of the tail is dependent on the elapsed time since reconnection of the oldest open field lines and that a much longer disconnected tail and wake can exist beyond this. The model is applied to two 8-hour intervals of observations, which indicate that the length of the tail can vary by almost a factor of 10, between ~400 and 4000 RE, in just a few hours. In addition, differing rates of lobe reconnection in the Northern and Southern Hemispheres are shown to lead to considerable differences in the lengths of the two magnetotail lobes.

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