Intra-seasonal cloud variations over India during summer monsoon season


  • A CHOWDHURY Meteorological Office, Pune
  • KCSINHA RAY Meteorological Office, Pune
  • RK MUKHOPADHYAY Meteorological Office, Pune



The paper deals with large scale v~riation5 of cloudiness over India and neighbourhood during the southwest monsoon. Daily satellite cloudiness values from 1 June to 30 September for the period 1982-1986 were subjected to harmonic analysis to investigate the presence of periodicities of the monsoon cloudiness.

The results confirmed presence of 30-60 day periodicities in the monsoon fluctuation,as the dominant modes. Associated with these periodicities poleward propagation of cloudiness is observed in each month of the monsoon season. Periodicity of 120 days appears north of 10 N in years of deficient rainfall while in the equatorial region the low frequency mode generally prevails Irrespective of the seasonal monsoon rainfall over India.




How to Cite

A. CHOWDHURY, K. . RAY, and R. MUKHOPADHYAY, “Intra-seasonal cloud variations over India during summer monsoon season”, MAUSAM, vol. 39, no. 4, pp. 359–366, Oct. 1988.



Research Papers