GLOBAL PROCESSES THAT DETERMINE COSMIC-RAY MODULATION - REPORT OF WORKING GROUP-1

The global processes that determine cosmic ray modulation are reviewed . The essential elements of the theory which describes cosmic ray beha vior in the heliosphere are summarized, and a series of discussions is presented which compare the expectations of this theory with observat ions of the spatial and temporal behavior of both galactic cosmic rays and the anomalous component; the behavior of cosmic ray electrons and ions; and the 26-day variations in cosmic rays as a function of helio graphic latitude. The general conclusion is that the current theory is essentially correct. There is clear evidence, in solar minimum condit ions, that the cosmic rays and the anomalous component behave as is ex pected from theory, with strong effects of gradient and curvature drif ts. There is strong evidence of considerable latitude transport of the cosmic rays, at all energies, but the mechanism by which this occurs is unclear. Despite the apparent success of the theory, there is no si ngle choice for the parameters which describe cosmic ray behavior, whi ch can account for all of the observed temporal and spatial variations , spectra, and electron vs, ion behavior.