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Detailed Reference Information |
Marchaudon, A., Cerisier, J.-C., Greenwald, R.A. and Sofko, G.J. (2004). Electrodynamics of a flux transfer event: Experimental test of the Southwood model. Geophysical Research Letters 31: doi: 10.1029/2004GL019922. issn: 0094-8276. |
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On 12 September 1999, a conjunction between two SuperDARN radars and the ¿rsted satellite gave, for the first time, simultaneous access to the ionospheric convection enhancement and the field-aligned currents (FACs) associated with a Flux Transfer Event. The radars observed an azimuthally elongated convection flow burst and the ¿rsted satellite observed a series of successive small-scale parallel currents alternating between downward and upward. The most poleward pair of currents, whose directions were in agreement with the Southwood model, was observed when ¿rsted crossed the front edge of the flow burst. A quantitative comparison of the current density of each FAC and of the Pedersen current density indicates that the closure current for this FACs pair occurred inside the flow burst, confirming the validity of the Southwood model. The Poynting flux carried by the parallel currents was less than 1% of the power carried by the solar wind plasma. |
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Abstract |
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Keywords
Ionosphere, Current systems, Ionosphere, Ionosphere/magnetosphere interactions, Ionosphere, Plasma convection, Magnetospheric Physics, Solar wind/magnetosphere interactions |
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Publisher
American Geophysical Union 2000 Florida Avenue N.W. Washington, D.C. 20009-1277 USA 1-202-462-6900 1-202-328-0566 service@agu.org |
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