Abstract A newly developed two-dimensional, time-dependent modulation model is applied to the simulation of propagating Forbush decreases (Fd's) in the heliosphere. Compared to a one-dimensional model the recovery time of a Fd is found to be significant less with this model. The magnitude as a function of radial distance is determined by (). In general, results are in reasonable agreement with observations. With drifts included the recovery rate differs significantly compared with the non-drift model, and depends strongly on the polarity of the solar magnetic field.
Episodic cosmic-ray modulation in the heliosphere
Advances in Space Research ; 9 , 4 ; 225-228
1989-01-01
4 pages
Article (Journal)
Electronic Resource
English
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