## Abstract Seasonal (June through September) percentage departure from normal rainfall patterns over India have been classified by objective methods utilizing data for a 120βyear period (1871β1990). The methods used are the mapβtoβmap correlation method and the __k__βmeans clustering method. Empir
Rainfall patterns in India
β Scribed by Vines, R. G.
- Publisher
- Wiley (John Wiley & Sons)
- Year
- 1986
- Weight
- 999 KB
- Volume
- 6
- Category
- Article
- ISSN
- 2314-6214
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β¦ Synopsis
Indian rainfall figures from World Weather Records have been subjected to filter analysis and the results suggest substantial coherence of data for central and north-west India. The analysis indicates that there is a long-term fluctuation in rainfall of period c. 22 years-possibly linked to the double sunspot cycle-and another of period c. 16 years, with which the first interacts. There is also some suggestion of an 18 to 19 year rainfall fluctuation, which is geared to the lunar (MN) cycle as first proposed by Campbell, Blechman and Bryson, and later by Currie.
There is further evidence of a 10 to 11 year fluctuation (medium-term) which is possibly connected with the single sunspot cycle, and an additional (short-term) fluctuation of 6 to 7 years. Comparisons are made between these findings and those previously reported in analyses of rainfall records from both northern and southern hemispheres.
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