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Study of rainfall singularities, cyclonic disturbances and sea-level pressure over southern India

Reddy, RS and Ramanamurty, BhV (1980) Study of rainfall singularities, cyclonic disturbances and sea-level pressure over southern India. Archives for Meteorology, Geophysics and Bioclimatology, A29. pp. 99-109.

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Abstract

Bowen's meteor hypothesis on rainfall singularities was seriously critisized by some and attributed to the occurrence of local cyclones around the dates of those singularities and also to long-term variations in pressure pattern. This aspect is examined in the present study by making use of frequency distribution method, considering five day periods, and cross-spectral technique of (i) cyclonic disturbances of Bay of Bengal, (ii) the daily average values of sea-level pressure of Bay of Bengal, and (iii) the total daily values of rainfall in Tamil Nadu, South India, during October–December, 1961–1970. The study made does not support the hypothesis that the rainfall singularities observed in an earlier study [1] were influenced by the cyclonic disturbances and long-term variations in pressure pattern. Power spectral analysis of rainfall and sea-level pressure revealed a common 15-day periodicity significant at 99 per cent level. The rainfall and sea-level pressure showed maximum correlation over a 15-day period with a relative phase of 5 days, rainfall preceding sea-level pressure

Item Type: Article
Additional Information: Copyright of this article belongs to Springer-Verlag
Subjects: Meteorology and Climatology
Depositing User: IITM Library
Date Deposited: 04 Jun 2016 08:44
Last Modified: 04 Jun 2016 08:44
URI: http://moeseprints.incois.gov.in/id/eprint/3319

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