Physics
Scientific paper
Jan 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987em%26p...37...79m&link_type=abstract
Earth, Moon, and Planets (ISSN 0167-9295), vol. 37, Jan. 1987, p. 79-88.
Physics
7
Galactic Cosmic Rays, Solar Activity Effects, Solar Protons, Solar Wind, Sunspot Cycle, Coronal Holes, Correlation Coefficients, Eigenvectors, Geomagnetism, Solar Flares
Scientific paper
An analysis of monthly data from nine world-wide neutron monitoring stations over the period 1965-1975 is carried out for the study of the long-term cosmic-ray modulation. In an attempt to gain insight into the relationships which exist between solar activity, high-speed solar wind streams and various terrestrial phenomena, an empirical relation for the cosmic-ray modulation has been found. Accordingly the modulated cosmic-ray intensity is equal to the galactic cosmic-ray intensity corrected by a few appropriate solar, interplanetary and terrestrial activity indices which causes the disturbances in interplanetary space, multiplying with the corresponding time-lag of cosmic-ray intensity from each of these indices. This relation is well explained by a generalization of the Simpson solar wind model which has been proved by the spherically symmetric diffusion-convection theory.
Mavromichalaki Helen
Petropoulos Basil
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