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Linkage between rainfall singularities and geomagnetic activity

Reddy, RS and Raja Rao, KS and Ramana Murty, BhV (1984) Linkage between rainfall singularities and geomagnetic activity. Archives for Meteorology, Geophysics, and Bioclimatology Series A, 33 (2-3). pp. 127-142.

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Abstract

The possible linkage between the daily rainfall of Tamil Nadu and the daily values of the sum of k-indices during geomagnetic great storms and magnetically quiet days has been investigated making use of superposed epoch method, frequency distribution, power spectral and cross spectral analyses. Geomagnetic activity during great storms and rainfall have a common 15-day periodicity which is significant at the 99 per cent level. Cross spectral analysis between the geomagnetic activity and rainfall shows maximum correlation over a period of 15-days significant at the 95 per cent level. The relative phase lag noticed between them is 6 days with the geomagnetic storm preceding rainfall. No significant peaks are noticed during geomagnetically quiet days. Cross spectral analysis shows no significant correlation. The possible physical mechanisms for the linkage are discussed.

Item Type: Article
Additional Information: Copyright of this article belongs to Springer-Verlag
Uncontrolled Keywords: k indices; rainfall; Tamil Nadu
Subjects: Meteorology and Climatology
Depositing User: IITM Library
Date Deposited: 20 Apr 2015 09:16
Last Modified: 20 Apr 2015 09:16
URI: http://moeseprints.incois.gov.in/id/eprint/1278

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