Physics
Scientific paper
Sep 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990jgr....9514995m&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 95, Sept. 1, 1990, p. 14995-15005.
Physics
55
Atmospheric Boundary Layer, Earth Magnetosphere, Vortices, Greenland, Kelvin-Helmholtz Instability, Magnetometers, Radar Measurement, Solar Wind
Scientific paper
Several classes of traveling vortices in the dayside ionosphere convection have been detected and tracked using the Greenland magnetometer chain (Friis-Christensen et al., 1988, McHenry et al., 1989). One class observed during quiet times consists of a continuous series of vortices moving generally antisunward for several hours at a time. The vortices' strength is seen to be approximately steady and neighboring vortices rotate in opposite directions. Sondrestrom radar observations show that the vortices are located at the ionospheric convection reversal boundary. Low altitude DMSP observations indicate the vortices are on field lines which map to the inner edge of the low latitude boundary layer. Because the vortices are conjugate to the boundary layer, repeat in a regular fashion and travel antisunward, it is argued that this class of vortices is caused by the Kelvin-Helmholtz instability of the inner edge of the magnetospheric boundary layer.
Clauer Robert C.
Friis-Christensen Eigil
Kelly John D.
McHenry Mark A.
Newell Patrick T.
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