HR: 14:25h
AN: SM53C-04    [Abstracts]
TI: On the relationship between ion upflow events and cusp auroral transients
AU: * Moen, J
EM: jmoen@fys.uio.no
AF: University of Oslo, Department of Physics P.O.Box 1048 Blindern, Oslo, 0316 Norway
AU: * Moen, J
EM: jmoen@fys.uio.no
AF: University Centre in Svalbard, Arctic Geophysics P.O. Box 156, Oslo, 9171 Norway
AU: Oksavik, K
EM: Kjellmar.Oksavik@fys.uio.no
AF: University of Oslo, Department of Physics P.O.Box 1048 Blindern, Oslo, 0316 Norway
AU: Carlson, H C
EM: herb.carlson@afosr.af.mil
AF: Air Force Office of Scientific Research, 801 Randolph Street Mail Room 732 , Arlington, VA 22303-1977 United States
AB: In this paper we present a one-to-one relationship between poleward moving auroral forms (PMAFs) in the cusp and ion upflows. 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.
DE: 2407 Auroral ionosphere (2704)
DE: 2451 Particle acceleration
DE: 2704 Auroral phenomena (2407)
DE: 2724 Magnetopause, cusp, and boundary layers
SC: SPA-Magnetospheric Physics [SM]
MN: 2004 AGU Fall Meeting