The modulation characteristics of the Forbush effect

Details The modulation characteristics of the Forbush effect The modulation characteristics of the Forbush effect

Sep 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982izssr..46.1733k&link_type=abstract

(Vsesoiuznaia Konferentsiia po Kosmicheskim Lucham, Samarkand, Uzbek SSR, Oct. 27-29, 1981.) Akademiia Nauk SSSR, Izvestiia, Ser

Physics

Cosmic Ray Showers, Forbush Decreases, Particle Flux Density, Solar Wind Velocity, Coupling Coefficients, Interplanetary Magnetic Fields

Scientific paper

The modulation characteristics of the Forbush effect are examined for two characteristic examples with high coefficients of coupling between solar-wind streams and Forbush decreases: the burst-type effect of February 16-19, 1967 and the quasi-stationary effect of April 5-9, 1968. It is assumed that the Forbush decrease is conditioned by the transport of cosmic rays together with IMF lines of force away from the sun with a velocity proportional to the plasma velocity. It is shown that an approach which takes into account a significant variation in plasma velocity as well as convection velocity must lead to a modification of existing models, which assume only a temporal character of the growth in intensity after the minimum of the Forbush decrease.

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