HR: 08:30h
AN: SM11C-03    [Abstracts]
TI: Cluster observations of the boundary waves and magnetic reconnection at the dawnside magnetospheric flank
AU: * Nykyri, K
EM: k.nykyri@ic.ac.uk
AF: Blackett Laboratory Imperial College, Prince Consort Road , London, SW7 2BZ United Kingdom
AU: Otto, A
EM: ao@how.gi.alaska.edu
AF: Geophysical Institute University of Alaska, 903 Koyukuk Drive, Fairbanks, AK 99775-7320 United States
AU: Mouikis, C
EM: cmouikis@atlas.sr.unh.edu
AF: University of New Hampshire, 39 College Road Durham, Durham, NH 03824 United States
AU: Kistler, L
EM: lynn.kistler@unh.edu
AF: University of New Hampshire, 39 College Road Durham, Durham, NH 03824 United States
AU: Balogh, A
EM: a.balogh@ic.ac.uk
AF: Blackett Laboratory Imperial College, Prince Consort Road , London, SW7 2BZ United Kingdom
AU: Reme, H
EM: Henri.Reme@cesr.fr
AF: Centre d'Etude Spatiale des Rayonnements(CESR), 9 avenue du Colonel Roche 4346 31028 Toulouse Cedex 4, Toulouse, 4346 31028 France
AB: We will examine Cluster observations at the far tail closely equatorial magnetospheric flank during periods small positive $b\_z$. For several hours Cluster satellites had several quasi-periodic encounters of low density, high temperature magnetospheric-like of plasma and high density, low temperature magnetosheath-like plasma with a frequency $\sim$ 5 minutes. The velocity and magnetic field components show more rapid oscillations with frequency $\sim$ 2 minutes, which indicates sub-structure embedded in the large scale motion. The boundary normals showed significant fluctuations in $z$-direction, and bipolar variations of the normal component of the magnetic field were observed together with local pressure enhancements. In addition the satellites observed several intervals satisfying the Walen relation and the de Hoffman Teller frame, often with much higher or lower transformation velocity than that of the overall boundary. We will discuss the role of the reconnection inside the non-linear Kelvin-Helmholtz vortices and local flux transfer events to account for these observations
DE: 7835 Magnetic reconnection
DE: 7859 Transport processes
DE: 2724 Magnetopause, cusp, and boundary layers
DE: 2752 MHD waves and instabilities
DE: 2794 Instruments and techniques
SC: SPA-Magnetospheric Physics [SM]
MN: 2004 AGU Fall Meeting