A Cyclogram Analysis of the Bratislava 14C Tree-Ring Record During the Last Century
| Autor: | Pavel P. Povinec, Teresa Nanni, M. R. Attolini, Menotti Galli |
|---|---|
| Rok vydání: | 1989 |
| Předmět: |
010506 paleontology
Archeology Sunspot 060102 archaeology 06 humanities and the arts 01 natural sciences Archaeology law.invention Absolute dating law Geochronology Dendrochronology General Earth and Planetary Sciences 0601 history and archaeology Physical geography Radiocarbon dating Quaternary Geology Holocene 0105 earth and related environmental sciences |
| Zdroj: | Radiocarbon. 31:839-845 |
| ISSN: | 1945-5755 0033-8222 |
| Popis: | Radiocarbon variations in dated tree-ring samples represent an important tool for the study of the history of solar activity and sun-earth relationships. From this point of view, an investigation of the 11-year radiocarbon cycle is very important. Our cyclogram analysis of the Δ 14C record in tree-ring samples during the last century has confirmed previous results obtained by conventional harmonic analysis, eg, the average amplitude of 2, the phase shift of 3–5 yr for different 11-yr solar cycles, and the anticorrelation dependence of Δ 14C on Wolf sunspot numbers. The observed shorter periodicity (ca 9 yr for Δ 14C compared to 10.5 yr for sunspots), may be due to extra factors in sun-earth relationships. |
| Databáze: | OpenAIRE |
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