Physics – Plasma Physics
Scientific paper
Apr 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000georl..27..919c&link_type=abstract
Geophysical Research Letters, Volume 27, Issue 7, p. 919-922
Physics
Plasma Physics
6
Ionosphere: Ionosphere/Magnetosphere Interactions, Ionosphere: Plasma Convection, Magnetospheric Physics: Magnetopause, Cusp, And Boundary Layers, Space Plasma Physics: Magnetic Reconnection
Scientific paper
Poleward-moving line-of-sight velocity ``flow bursts'' have been observed in the cusp by two southern hemisphere SuperDARN HF radars with overlapping fields-of-view. This has allowed the estimation of unambiguous two-dimensional velocity vectors in the vicinity of the ``flow bursts.'' Rather than showing enhancements in the flow magnitude, the velocity vectors suggest that the line-of-sight velocity enhancements are a result of a change in the direction of the flow associated with latitudinal motion of the convection reversal boundary. These observations may have important implications for understanding the ionospheric footprint of flux transfer events, and also illustrate that caution is needed when interpreting line-of-sight velocity data from single radars.
Chisham Gareth
Pinnock Michael
Rodger Alan S.
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