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Signatures of a universal spectrum for atmospheric interannual variability in rainfall time series over the Indian region

Selvam, AM and Pethkar, JS and Kulkarni, MK (1992) Signatures of a universal spectrum for atmospheric interannual variability in rainfall time series over the Indian region. International Journal of Climatology, 12 (2). pp. 137-152.

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Abstract

The important results of the present study are as follows. i) The power spectrum of the temporal fluctuations of rainfall follows the universal inverse power law form of the statistical normal distribution, with the square of the eddy amplitude representing the eddy probability density corresponding to the normalized standard deviation t equal to (log λ/log λ50)-1; where λ is the period length in years and λ50 the period up to which the cumulative percentage contribution to total variance is equal to 50 and t=0. ii) Periodicities in rainfall up to 3-4yr contribute to as much as 50 of the total variance. A universal spectrum for interannual variability in summer monsoon rainfall indicates predictability of the overall pattern of rainfall fluctuations.

Item Type: Article
Additional Information: Copyright of this article belongs to John Wiley & Sons
Uncontrolled Keywords: deterministic chaos; interannual variability; monsoon; rain time series; rain variability; universal spectrum, India
Subjects: Meteorology and Climatology
Depositing User: IITM Library
Date Deposited: 09 May 2015 05:13
Last Modified: 09 May 2015 05:13
URI: http://moeseprints.incois.gov.in/id/eprint/1113

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