Bulg. J. Phys. vol.34 no.s2 (2007), pp. 105-113


The Climate of Bulgaria during 19th and 20th Centuries by Instrumental and Indirect Data: Solar Modulated Cyles and Its Evolution

B. Komitov, M. Dechev, P. Duchlev
Institute of Astronomy, Bulgarian Academy of Sciences, Sofia 1784, Bulgaria
Abstract. At the beginning of 80s a very detailed studies of bulgarian climate changes during 20th century has been provided. In this work we give an evidence that the climatic phenomenas during last two decades are caused rather by solar activity variations effects as by any other factor. The new study is based on meteorological measurements data for the period 1980-1994 in addition to the previous information as well as on indirect climatic data (tree rings width data series from AD 1780 to AD 1982) and new solar activity data, including the indirect "cosmogenic" 10Be series.

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