Computer Science – Sound
Scientific paper
Sep 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981jgr....86.7639r&link_type=abstract
Journal of Geophysical Research, vol. 86, Sept. 1, 1981, p. 7639-7648.
Computer Science
Sound
272
Convective Flow, Electric Potential, Interplanetary Magnetic Fields, Polar Caps, Satellite Sounding, Geomagnetism, Least Squares Method, Solar Wind, Vortices
Scientific paper
The convection potential drop across the polar cap is computed from data obtained on high-inclination low-altitude satellites. Potential measurements are correlated with various combinations of parameters measured simultaneously in the upstream solar wind. Most of the potential drop is successfully predicted by merging theory, although a significant background potential drop of 35 kV does not depend on IMF parameters and is attributed to a process other than merging. Results indicate that small values of the IMF are amplified by a factor of 5-10 at the dayside magnetopause, which, when taken into account, improves correlations between IMF parameters and polar cap potential drop. Potential drop is better correlated with IMF parameters than with geomagnetic indices, due to nonlinear response of the magnetosphere affecting geomagnetic activity indices.
Hill Thomas W.
Reiff Patricia H.
Spiro Robert W.
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