Atmospheric surface layer parameters during different phases of monsoon over Varanasi from MONTBLEX-90

The fast and slow response data (8 Hz and 1 Hz respectively), obtained from the MONTBLEX-90 programme, are analysed for computing various surface layer parameters and the fluxes of sensible heat and momentum. In the present paper these fluxes, the Monin-Obukhov length scale (L), the turbulent kinetic energy (TKE), and the intensity of turbulence (σ_w) over Varanasi have been computed during different phases of monsoon such as dry, weak, moderate and active. Typical days are chosen for studying the above-mentioned parameters.