Code 613.1 Branch Seminar: Ramesh Srivastava

University of Chicago
A method for the estimation of raindrop size distribution, water vapor and vertical air velocity in light rain using vertically pointing dual-wavelength (3.2 cm and 3.2 mm) Doppler radar is presented. The dual-wavelength reflectivities, mean Doppler velocities and variances are needed for the estimation of the three parameters of the gamma function representation of the raindrop size distribution and the range-resolved water vapor and vertical air velocity distributions. The method is applied to an observation of widespread stratiform rain by an airborne nadir looking dual-wavelength radar system. The results obtained will be discussed. The method has potential application to the direct calculation of evaporation of rain.