Diurnal variation of tropospheric temperature at a tropical station

The vertical velocity in the troposphere-lower stratosphere region measured using MST radar has been utilized to evaluate the temperature profile in t he region. The diurnal variation of the tropospheric temperature on one day in August 1998 at the tropical station Gadanki (13.5 degrees N, 79.2 degre es E) has been studied using the MST radar technique. The diurnal variation of the temperature revealed a prominent diurnal variation with the peak in the afternoon hours increasingly delayed in altitude. The tropopause tempe rature and altitude exhibited a clear diurnal cycle.