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PHASE EVOLUTION OF SOLAR ACTIVITY AND COSMIC-RAY VARIATION CYCLES

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Abstract

Cycles of phase evolution of solar activity and cosmic-ray variations are reconstructed by means of the delay component method, which allows us to study the temporal behaviour of time lag between solar activity and cosmic-ray cycle phases. It is shown that the period of the late 20th cycle was very unusual. We have found a delay in the phase of the solar activity cycle with respect to that of cosmic rays and discuss the heliospheric conditions responsible for this delay.

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Authors and Affiliations

  1. A.F. Ioffe Physical-technical Institute, 194021, St. Petersburg, Russia

    I. G. Usoskin, G. A. Kovaltsov, K. Mursula & P. J. Tanskanen

  2. University of Oulu, FIN-90570, Oulu, Finland

    H. Kananen

Authors
  1. I. G. Usoskin
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  2. G. A. Kovaltsov
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  3. H. Kananen
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  4. K. Mursula
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  5. P. J. Tanskanen
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Usoskin, I.G., Kovaltsov, G.A., Kananen, H. et al. PHASE EVOLUTION OF SOLAR ACTIVITY AND COSMIC-RAY VARIATION CYCLES. Solar Physics 170, 447–452 (1997). https://doi.org/10.1023/A:1004971320041

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  • DOI: https://doi.org/10.1023/A:1004971320041

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