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

  • O. M. Raspopov
  • V. A. Dergachev
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Abstract

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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Copyright information

© Allerton Press, Inc. 2007

Authors and Affiliations

  • O. M. Raspopov
    • 1
  • V. A. Dergachev
    • 2
  1. 1.St. Petersburg Filial of the Pushkov Institute of Terrestrial Magnetism, Ionosphere, and Radio Wave PropagationRussian Academy of SciencesSt. PetersburgRussia
  2. 2.Ioffe Physicotechnical InstituteRussian Academy of SciencesSt. PetersburgRussia

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