Bulletin of the Russian Academy of Sciences: Physics

, Volume 71, Issue 7, pp 1014–1017

200-year variations in cosmic rays modulated by solar activity and their climatic response


  • O. M. Raspopov
    • St. Petersburg Filial of the Pushkov Institute of Terrestrial Magnetism, Ionosphere, and Radio Wave PropagationRussian Academy of Sciences
  • V. A. Dergachev
    • Ioffe Physicotechnical InstituteRussian Academy of Sciences

DOI: 10.3103/S1062873807070362

Cite this article as:
Raspopov, O.M. & Dergachev, V.A. Bull. Russ. Acad. Sci. Phys. (2007) 71: 1014. doi:10.3103/S1062873807070362


Manifestation of the 200-year solar cycle (de Vries cycle) in climatic changes (summer temperatures) has been investigated by analyzing the radial growth of long-lived (800–1200 yr) Juniperus turkestanica trees in Central Asia. Quasi-two-hundred-year variations in the radial growth of trees have been revealed, which correlate well (correlation coefficient reaches 0.94) with similar solar activity variations (Δ14C).

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© Allerton Press, Inc. 2007