Ionospheric Signatures of Pulsed Magnetopause Reconnection
Lockwood, M. (1994) Ionospheric Signatures of Pulsed Magnetopause Reconnection. In: NATO Advanced Research Workshop on Physical Signatures of Magnetospheric Boundary Layer Processes, 9-14 May 1993, Hönefoss, Norway, pp. 229-243. (in "Physical Signatures of Magnetospheric Boundary Layer Processes", Proc. NATO Advanced Study Institute, NATO ASI Series Volume 425, 1994 )
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To link to this item DOI: 10.1007/978-94-011-1052-5_16
The concept of zero-flow equilibria of the magnetosphere-ionosphere system leads to a large number of predictions concerning the ionospheric signatures of pulsed magnetopause reconnection. These include: poleward-moving F-region electron temperature enhancements and associated transient 630nm emission; associated poleward plasma flow which, compared to the pulsed variation of the reconnection rate, is highly smoothed by induction effects; oscillatory latitudinal motion of the open/closed field line boundary; phase lag of plasma flow enhancements after equatorward motions of the boundary; azimuthal plasma flow bursts, coincident in time and space with the 630nm-dominant auroral transients, only when the magnitude of the By component of the interplanetary magnetic field (IMF) is large; azimuthal-then-poleward motion of 630nm-dominant transients at a velocity which at all times equals the internal plasma flow velocity; 557.7nm-dominant transients on one edge of the 630nm-dominant transient (initially, and for large |By|, on the poleward or equatorward edge depending on the polarity of IMF By); tailward expansion of the flow response at several km s-1; and discrete steps in the cusp ion dispersion signature between the polewardmoving structures. This paper discusses these predictions and how all have recently been confirmed by combinations of observations by optical instruments on the Svalbard Islands, the EISCAT radars and the DMSP and DE satellites.