Usability of the low frequency mode in southwest monsoon circulation for long range prediction of rainfall activity over central India
pro pagation have been ctudicd on the hasi, of upper air data of a few sta tions,
The frequency of occurrence Ill' significant periodicity in th is mode i.. rchuively high for Visakhapatnam and
Madras. 1 here appears a large inter-annual variability of the maximum amplitudes of rhe filtered series with no
special preference to any latitudinal bell. Northward propagation of this mode also slums large inn.....-annunl
varisbility. In some ~ears the propaga tion " as totally absent. The phusc changes in the filtered ser ies o f
Visakbapnma rn match ed with the cha nges in weekly ra infall activity over central India and thi.. may, pcrhups.
be used to foreshadow the activ ity of the monsoon over central India ,
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