Keating, John and Mulligan, F.J. and Doyle, D.B. and Winser, K.J. and Lockwood, M.
A Statistal Study of Large Field-Aligned Flows of Thermal Ions at High-Latitudes.
Planetary and Space Science, 38 (9).
A number of case studies of large, transient, field-aligned ion flows in the topside ionosphere at high-latitudes have been reported, showing that these events occur during periods of frictional heating and/or intense particle precipitation. This study examines the frequency of occurance of such events for the altitude range 200-500km, based on 3 years of incoherent scatter data. Correlations of the upgoing ion flux at 400km with ion and electron temperatures at lower altitudes are presented, together with a discussion of possible mechanisms for the production of such large flows. The influence of low-altitude electron precipitation on the production of these events is also considered.
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