A Tree-Ring Record of Precipitation in Western Nebraska
A study of tree rings in carefully selected specimens of red cedar and ponderosa pine from various parts of western Nebraska shows that for the last 400 years there have been frequent dry years or short periods of dry years, with less frequent droughts lasting for 5 years or more. The latter have averaged 12.85 years in length, and the period between them 20.58 years. The correlation between annual ring growth and annual rainfall as recorded by the Weather Bureau indicates a high degree of statistical significance. The data do not show precipitation cycles of sufficient regularity to be of value in the exact forecasting of future droughts.
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Document Type: Journal Article
Affiliations: Junior Agronomist, Division of Dry Land Agriculture, U. S. Department of Agriculture and the University of Nebraska, Lincoln, Neb.
Publication date: 1943-11-01
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