Abstract
The profile of the well-known 11-year variation of the cosmic ray intensity appears to depend upon the emerging solar polar magnetic field regime in a very characteristic manner. During the solar activity cycle 19, the cosmic ray intensity takes about seven years to recover to its solar activity minimum level. But during the solar activity cycle 20, the recovery takes place in only about two years. It appears that these characteristic recovery modes are obtainable every other solar activity cycle. We are led to suggest two model configurations for the heliosphere. We believe that an “open” heliosphere model applies to solar activity cycles 18 and 20. A “closed” heliosphere model is obtainable during solar activity cycles 17 and 19. Our results are discussed.
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Ahluwalia, H.S. (1980). Solar Polar Field Reversals and Secular Variation of Cosmic Ray Intensity. In: Dryer, M., Tandberg-Hanssen, E. (eds) Solar and Interplanetary Dynamics. International Astronomical Union / Union Astronomique Internationale, vol 91. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-9100-2_13
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DOI: https://doi.org/10.1007/978-94-009-9100-2_13
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