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 ( 1 K rr K 1 rK rr ). 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.


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    Title :

    Episodic cosmic-ray modulation in the heliosphere


    Contributors:

    Published in:

    Publication date :

    1989-01-01


    Size :

    4 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




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