Cause of plasmasphere corotation lag

Details Cause of plasmasphere corotation lag Cause of plasmasphere corotation lag

Mar 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004georl..3105802b&link_type=abstract

Geophysical Research Letters, Volume 31, Issue 5, CiteID L05802

Physics

18

Magnetospheric Physics: Electric Fields (2411), Magnetospheric Physics: Magnetosphere-Inner, Magnetospheric Physics: Magnetosphere/Ionosphere Interactions, Magnetospheric Physics: Plasma Convection, Magnetospheric Physics: Plasmasphere

Scientific paper

It is hypothesized that the recently observed plasmasphere corotation lag is caused by a corresponding corotation lag in the upper ionosphere. Rotation rates of long-lived plasmaspheric notches are compared to ionospheric drifts observed on DMSP spacecraft in the same longitude sectors. Good agreement between the two observations is found, and the cause of the corotation lag is identified as the ionospheric disturbance dynamo. The observed corotation lag will have to be accounted for in future magnetospheric convection models, which until now have assumed strict plasmasphere corotation.

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