Nu. Crooker et al., CIR morphology, turbulence, discontinuities, and energetic particles - Report of Working Group 2, SPACE SCI R, 89(1-2), 1999, pp. 179-220
Corotating interaction regions (CIRs) in the middle heliosphere have distin
ct morphological features and associated patterns of turbulence and energet
ic particles. This report summarizes current understanding of those feature
s and patterns, discusses how they can vary from case to case and with dist
ance from the Sun and possible causes of those variations, presents an anal
ytical model of the morphological features found in earlier qualitative mod
els and numerical simulations, and identifies aspects of the features and p
atterns that have yet to be resolved.