SAID: A turbulent plasmaspheric boundary layer

Details SAID: A turbulent plasmaspheric boundary layer SAID: A turbulent plasmaspheric boundary layer

Apr 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010georl..3707106m&link_type=abstract

Geophysical Research Letters, Volume 37, Issue 7, CiteID L07106

Physics

1

Magnetospheric Physics: Plasmasphere, Magnetospheric Physics: Plasma Waves And Instabilities (2471), Magnetospheric Physics: Magnetosphere: Inner

Scientific paper

This paper presents novel features of subauroral ion drifts (SAID) observed from a unique conjunction of the Cluster, DMSP, and Polar satellites, including the discovery of SAID-related plasma waves. These observations confirm and expand on our proposed concept of the SAID channel being a turbulent boundary layer, formed via a short circuit of the substorm-injected plasmoid by the plasmasphere. We show that SAID formation is related to enhanced lower hybrid/fast magnetosonic waves. Their excitation leads to anomalous circuit resistivity and magnetic diffusion, similar to the well-documented plasmoid-magnetic barrier problem, including impulsive penetration at the magnetopause.

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