On the relationship between ion upflow events and cusp auroral transients

Details On the relationship between ion upflow events and cusp auroral transients On the relationship between ion upflow events and cusp auroral transients

Jun 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004georl..3111808m&link_type=abstract

Geophysical Research Letters, Volume 31, Issue 11, CiteID L11808

Physics

12

Ionosphere: Auroral Ionosphere (2704), Ionosphere: Particle Acceleration, Ionosphere: Polar Cap Ionosphere, Ionosphere: Topside Ionosphere, Magnetospheric Physics: Magnetopause, Cusp, And Boundary Layers

Scientific paper

In this paper we present a one-to-one relationship between poleward moving auroral forms (PMAFs) and ion upflows in the cusp. Ion upflows have the same quasi-periodic nature as cusp auroral transients, which are believed to be a signature of flux-transfer events. This new observation corroborates the idea that low energy particle precipitation is the dominant source of energy for ion upflows. Some events were lacking elevated Ti which indicates that frictional heating is not required. The ion upflow events broadened with altitude in characteristic V-shape. We suggest that each PMAF was associated with an inverted V- potential structure moving over the radar.

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