Spatial scale of high-speed flows in the plasma sheet observed by Cluster

Details Spatial scale of high-speed flows in the plasma sheet observed by Cluster Spatial scale of high-speed flows in the plasma sheet observed by Cluster

May 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004georl..3109804n&link_type=abstract

Geophysical Research Letters, Volume 31, Issue 9, CiteID L09804

Physics

51

Magnetospheric Physics: Magnetotail Boundary Layers, Magnetospheric Physics: Plasma Convection, Magnetospheric Physics: Plasma Sheet

Scientific paper

Spatial gradients of high-speed flows in the midtail plasma sheet are determined using multipoint observations from the Cluster spacecraft along the ``dawn-dusk'' direction (perpendicular to the main flow and in the plane of the tail current sheet) and along the north-south direction. If we take the average or median of the spatial gradients and assume that the flow channel has a linear gradient, these values suggest that the full width of the flow channel is 2-3 RE in the ``dawn-dusk'' direction and 1.5-2 RE in the north-south direction. The velocity gradient at the duskward edge of a flow tends to be sharper than that at the dawnward edge, possibly reflecting an asymmetry in the magnetosphere-ionosphere coupling process associated with the flow.

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