LOW FREQUENCY OSCILLATIONS IN TROPOSPHERIC WINDS DURING CONTRASTING SUMMER MONSOON OVER INDIA
Keywords:Low freq uency oscillations, Spectrum analyasis techniques, Zonal wind shear, Interannual variability
TIle'low frequency Iluctu atio ns in the troposphe ric wind field over India has been studied by spec tnuu
~ na l l"i, tech nique. duri ng con trasting mon soons. namely, d rought and good monsoons ba sed on rainfall
3cti\il)·. Si~ lliflc ant spectral peaks d urin g these years ha ve bee n iden tified.Zon al wind shea r in the lower tropospher e
han' also bern examin ed and the periodici ty in th e near 4()..day mode have bee n documented . Th e interannual
, 'n.riill1i1ily of the mode and its potential as medium range predicti on tool has been examined in the
rrnpn perspect ive.
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