On the statistical aspects of sunspot number time series and its association with the summer-monsoon rainfall over India

Surajit Chattopadhyay1* and Goutami Chattopadhyay2
1Pailan College of Management and Technology, Kolkata, India
2Bengal Engineering and Science University, Shibpur, Howrah, India

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The present paper reports studies on the association between the mean annual sunspot numbers and the summer monsoon rainfall over India. The cross correlations have been studied. After Box-Cox transformation, the time spectral analysis has been executed and it has been found that both of the time series have an important spectrum at the fifth harmonic. An artificial neural network (ANN) model has been developed on the data series averaged continuously by five years and the neural network could establish a predictor-predict and relationship between the sunspot numbers and the mean yearly summer monsoon rainfall over India.

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Keywords : sunspot numbers – spectral analysis – ANN – summer monsoon rainfall