Annual Growth Sequences and Solar Activity Cycles (Examples from Subfossil Oaks from Southern Poland)

• Autorzy: Krawczyk A. , Krąpiec M.
• Języki publikacji: EN

Abstrakty

EN

This work presents results of studies on possibilities of finding periodicity related to solar activity changes in annual growth sequences of trees. The analyzed material were subfossil oak trunks (so-called black oaks) lifted from alluvial deposits of the Vistula river in the vicinity of Cracow, which had been felled and subsequently buried around 8000, 4600, 3500, 2000 and 1000 years ago. Treatment of the tree-ring data with methods of spectral analysis of time series revealed that most of the analyzed annual growth sequences contained distinct cyclic components, among them such ones of which periods might have corresponded to periods of solar activity cyclic changes. The obtained results suggest that lengths of the identified cycles were increasing between 8000 and 4600 years ago and decreasing in later millennia.

Słowa kluczowe

EN

dendrochronology; solar cycles; time series

• Wydawca: Centrum Upowszechniania Nauki PAN
• Czasopismo: Bulletin of the Polish Academy of Sciences. Earth Sciences
• Rocznik: 2003
• Tom: Vol. 51, nr 1
• Strony: 29--41
• Opis fizyczny: Bibliogr. 25 poz.

Twórcy

autor

Krawczyk A.

autor

Krąpiec M.

• Department of General and Mathematical Geology, Faculty of Geology, Geophysics and Environmental Protection, University of Science and Technology, Kraków, poland