Dependence of hydromagnetic energy spectra near L = 2 and L = 3 on upstream solar wind parameters

Details Dependence of hydromagnetic energy spectra near L = 2 and L = 3 on upstream solar wind parameters Dependence of hydromagnetic energy spectra near L = 2 and L = 3 on upstream solar wind parameters

Jun 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985jgr....90.5117w&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 90, June 1, 1985, p. 5117-5131. Research supported by the Consiglio Nazio

Physics

26

Atmospheric Physics, Earth Magnetosphere, Energy Transfer, Magnetoacoustic Waves, Solar Terrestrial Interactions, Solar Wind, Bow Waves, Magnetohydrodynamic Waves, Power Spectra, Statistical Analysis, Upstream

Scientific paper

The results of a number of studies relate geomagnetic field fluctuations measured in the magnetosphere and on the surface of the earth to solar wind parameters. Lanzerotti et al. (1981) have reported rapid changes in the phase and polarization of hydromagnetic waves in the Pc 3 frequency range at stations closely spaced in latitude. Medford et al. (1982) have found that there are also substantial differences in the hydromagnetic power measured at periods equal to or less than 60 s among stations. The present investigation is concerned with the utilization of interplanetary magnetic field data and data from a number of ground-based magnetometer stations in a study of possible energy sources for hydromagnetic energy input to the low-latitude magnetosphere. It is found that solar wind conditions, particularly interplanetary magnetic field direction changes, appear to control the generation and propagation of MHD waves in the solar wind.

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