Physics
Scientific paper
Dec 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982soph...81..375v&link_type=abstract
Solar Physics, vol. 81, Dec. 1982, p. 375-381. Natural Sciences and Engineering Research Council
Physics
37
Coronal Holes, Cosmic Rays, Solar Activity Effects, Solar Wind Velocity, Annual Variations, Forbush Decreases, Galactic Radiation, Long Term Effects, Particle Flux Density, Solar Corpuscular Radiation, Solar Cycles, Solar Flares, Sunspot Cycle
Scientific paper
The differences in the effects of high-speed solar wind streams from coronal holes and solar flares on cosmic ray intensity for the period 1973-78 are investigated. Published interplanetary medium data plots are used for the selection of events, as well as the daily mean intensity of cosmic rays observed by the high latitude neutron and meson monitors of Inuvik and the low latitude neutron monitor at Tokyo. A difference in the rigidity spectrum of the short-term variation of cosmic ray intensity is observed. The small but significant cosmic ray intensity decreases with an almost flat rigidity spectral variation are associated with a large number of high speed streams essentially predominant during the declining phase of the sunspot cycle. During periods of maximum sunspot activity, these high speed streams decline in number, but the ones present produce much larger decreases in cosmic ray intensity.
Agrawal S. P.
Shukla Anshu K.
Venkatesan D.
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