Interplanetary flow systems associated with cosmic ray modulation in 1977–1980

Authors:
  • LBL. F. Burlaga
    L. F. Burlaga
  • FMF. B. McDonald
    F. B. McDonald
  • NNN. F. Ness
    N. F. Ness
  • RSR. Schwenn
    R. Schwenn
  • ALA. J. Lazarus
    A. J. Lazarus
  • FMF. Mariani
    F. Mariani
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Abstract
The hydromagnetic flow configurations associated with the cosmic ray modulation in 1977–1980 were determined using solar wind plasma and magnetic field data from Voyager 1 and 2 and Helios 1. The modulation was related to two types of large‐scale systems of flows: one containing a number of transients such as shocks and postshock flows, the other consisting primarily of a series of quasi‐stationary flows following interaction regions containing a stream interface and often bounded by a forward‐reverse shock pair. Each of three major episodes of cosmic ray modulation was associated with the passage of a system of transient flows. Plateaus in the cosmic ray intensity‐time profile were associated with the passage of systems of corotating streams.

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