A universal spectrum for interannual variability of monsoon rainfall over India |
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| Authors: | A. Mary Selvam |
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| Affiliation: | Indian Institute of Tropical Meteorology, Pune 411008, India |
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| Abstract: | Continuous periodogram analyses of 115 years (1871–1985) summer monsoon rainfall over the Indian region show that the power spectra follow the universal and unique inverse power law form of the statistical normal distribution with the percentage contribution to total variance representing the eddy probability corresponding to the normalized standard deviation equal to [(logL / logT 50)-1] whereL is the period length in years andT 50 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 model foratmospheric flows. The implications of the above result for prediction of interannual variability of rainfall is discussed. |
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