N/A. English: Plate 11. A. Periodogram of standard 5-year period. B. Periodogram of mixed periods. C. Periodogram of sunspot numbers, 1610-1910. D. Periodogram of Flagstaff 500-year record, to show cycles between 4 and 15 years of length. E. Periodogram of same continued to 25 years. 1919. Andrew Ellicott Douglass 353 Climatic Cycles and Tree-Growth Plate 11

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Size: 2111px × 2368px
Photo credit: © The Picture Art Collection / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: ., /, /., 1919., andrew, douglass., ellicott