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

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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).

Original Russian Text © O.M. Raspopov, V.A. Dergachev, 2007, published in Izvestiya Rossiiskoi Akademii Nauk, Seriya Fizicheskaya, 2007, Vol. 71, No. 7, pp. 1044–1046.