Some Unique Characteristics of Atmospheric Interannual Variability in Rainfall Time Series over India and the United Kingdom

Continuous periodogram analyses of two 50-years (1871-1920 and 1936- 1985) of summer monsoon rainfall over the Indian region and one 84-years set (1893-1976) of winter half-year rainfall over England and Wales show that the power spectra of disparate rainfall regimes follow the universal and unique inverse power law form of the sta-tistical normal distribution with the percentage contribution to total variance representating the eddy probability cor-responding to the normalized standard deviation equal to (log L / log T50)-l where L is the period in years and T50 the period up to which the cumulative percentage contribution to total variance is equal to 50. The above results are consistent with a recently developed non-deterministic cell dynamical system model for atmospheric flows. The im-plications or the above results for prediction of interannual variability of rainfall is discussed.