𝔖 Bobbio Scriptorium
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Tree decline in North America

✍ Scribed by Chevone, B.I.; Linzon, S.N.

Book ID
122717063
Publisher
Elsevier Science
Year
1988
Tongue
English
Weight
817 KB
Volume
50
Category
Article
ISSN
0269-7491

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## Abstract Maximum entropy spectrum analysis of 305 tree‐ring chronologies from North America yields evidence for two terms with periods 18.6 Β± 1.3 years (in 286 out of 305 series) and 10.5 Β± 0.5 years in 244 instances. Statistical tests show the terms to be significant at confidence levels of 99.