Physics
Scientific paper
Jul 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003icrc....7.4205s&link_type=abstract
Proceedings of the 28th International Cosmic Ray Conference. July 31-August 7, 2003. Trukuba, Japan. Under the auspices of the I
Physics
1
Scientific paper
The studies of Friis-Christensen and Svensmark reported a variation of 34% in the global cloud cover between 1980 and 1995 that appeared to be correlated with the change in galactic cosmic radiation flux over the solar cycle. Using world grids of vertical cutoff rigidities calculated over a 400-year interval and assuming constant solar modulation over that period, we find that the cosmic ray flux over the glob e has increased by 18 percent. This change is equivalent to the cosmic ray flux at high latitude locations over a solar cycle. We also find that the change in the cosmic ray flux over the 400-year interval is not uniformly distributed. We suggest that the long-term change in the cosmic radiation impinging at the top of the atmosphere at specific locations on the glob e should be considered in studies of possible relationships between cosmic radiation and climate.
Shea Margaret Ann
Smart Don Frederick
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