Galactic cosmic rays in the heliosphere.

This review covers the sessions SH 3.1–3.5: “Galactic cosmic rays in the heliosphere” of the 26th International Cosmic Ray Conference held in Salt Lake City, Utah, in August 1999. The subtopics are modulation models, long-term variations, gradients, anisotropies, and spectra, composition & charge state. Noteworthy contributions include a number of new models, numerical simulations of transport coefficients—including the first of the drift coefficient—that highlight the continuing problems with perpendicular transport, various other attempts to pin down the spatial and rigidity dependence of the diffusion tensor, charge-dependent modulation and especially the role of the wavy current sheet, and the Gnevyshev gap during solar maximum conditions. © 2000 American Institute of Physics. [ABSTRACT FROM AUTHOR]