Electronic Resource
Oxford, UK
:
Blackwell Publishing Ltd
Terra nova
5 (1993), S. 0
ISSN:
1365-3121
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Geosciences
Notes:
We have analysed ring-width records of two Miocene coniferous trees with an absolute age of 15–20 million years. Such data may reflect solar periodicities from the prehistoric past. Evidence for a main period of ∼ 12.5 years has been found. This is near the present basic solar activity period of ∼ 11 years. Other periodic components appear at 220, 150 and 53 years, respectively, which may also be related to solar variations.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1365-3121.1993.tb00269.x
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