Inter-annual variability in the dynamics and physics of the mean onset date of monsoon over Indian region

Naik, SS and George, L and Salvekar, PS (2004) Inter-annual variability in the dynamics and physics of the mean onset date of monsoon over Indian region. Indian Journal of Radio and Space Physics, 33 (4). pp. 241-251.

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Abstract

From observational and statistical studies, the mean onset date of southwest monsoon for India is 1 st June with standard deviation of 8 days. In view of this, the atmospheric circulation over India and neighbourhood (EQ-25°N, 50°E-90°E) for the mean onset date is studied using NCEP reanalyzed data from surface-300 hPa for three different years, i.e. (i) year 2000 having normal onset, (ii) year 1999, early onset (i.e. 25 th May) and (iii) year 1997, late onset (i.e. 9 th June). The influence of all dynamical and physical parameters for all the three years are discussed in the present study for understanding the dynamics and physics associated with onset conditions on 1 st June.

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