Study of vertical wind and temperature turbulence in a convective boundary layer from sodar observation at Thumba

Abstract

Sodar data obtained during convective condition at the coastal station, Thumba, have been analysed to study the turbulent nature of vertical wind (<i>w</i>) and the temperature structure parameter (C<img src='http://www.niscair.res.in/jinfo/twot.gif' border=0>). The height profile has a slope of -4/3 indicating that the boundary layer was convectively driven during the period of observation. From the autocorelogram of <i>w</i>, the eddy sizes during convection have been estimated. The frequency distribution of <i>w</i> and <i>C</i><img src='http://www.niscair.res.in/jinfo/twot.gif' border=0> shows as non-Gaussian behaviour with positive skewness and the coefficient of skewness has a lower value at a lower height.