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

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


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).


Solar Activity Radial Growth Wavelet Transformation Paleoclimatic Data Dendrochronological Data 
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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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