File:Climatic Cycles and Tree-Growth Fig 38.jpg

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English: Fig. 38.—Triple sunspot cycle in a single tree from northern Norway. Lower curve, a 34-year cycle.
Date
Source Climatic Cycles and Tree-Growth
Author Andrew Ellicott Douglass

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Date/TimeThumbnailDimensionsUserComment
current19:06, 10 August 2012Thumbnail for version as of 19:06, 10 August 20121,098 × 397 (41 KB)Keith Edkins== {{int:filedesc}} == {{Information |Description={{en|1=Fig. 38.—Triple sunspot cycle in a single tree from northern Norway. Lower curve, a 34-year cycle.}} |date=1919 |Source=''Climatic Cycles and Tree-Growth'' |Author=Andrew Ellicott Douglass |Per...