Physics
Scientific paper
May 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989jgr....94.5479h&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 94, May 1, 1989, p. 5479-5484.
Physics
4
Auroral Zones, Geomagnetism, Interplanetary Magnetic Fields, Solar Wind, Earth Magnetosphere, Magnetohydrodynamics, Perturbation Theory, Wind Velocity
Scientific paper
The hourly values of solar wind parameters and AE indices at times when the IMF has a strong northward component are used to study the dependence of AE on the value of the IMF (B) and on the temporal trends of the solar-wind velocity (V). In any randomly chosen statistical set of data, the dependence of AE on B is substantially modified by spurious effects related to the structure of the solar-wind streams. In particular, the leveling off of AE at high values of B is spurious; d(AE)/dB is positive for all values of B. AE values corresponding to negative dV/dt are lower than AE values corresponding to positive dV/dt. This effect is caused by physical processes involving the solar wind-magnetosphere coupling.
Hruska A.
Hruška J.
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