Cyclical Variations in World-Wide Hydrologic Data
- 1 November 1961
- journal article
- Published by American Society of Civil Engineers (ASCE) in Journal of the Hydraulics Division
- Vol. 87 (6) , 71-88
- https://doi.org/10.1061/jyceaj.0000668
Abstract
Discussion of investigations, performed by engineers and scientists for many years; sunspot numbers as index of solar activity which cause long term variations in hydrologic data; effects of 11 yr sunspot cycle and of assumed 100 yr cycle; data are expressed as ratios to mean in order to obtain dimensionless basis for comparison; 3 yr moving averages; long term variations from mean.Keywords
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