Microphysical characteristics of rainfall during different seasons over a coastal tropical station using disdrometer

摘要

Drop size distribution (DSD) over the tropical region exhibit pronounced variations during different monsoon seasons. Measurements from an impact type Joss-Waldovgel disdrometer is used for characterization of drop size distribution and its integral parameters over a tropical coastal station (Thiruvananthapuram, 8.31 degrees N, 76.54 degrees E, 20 m asl). Rain events were identified during the winter, premonsoon, summer monsoon and postmonsoon seasons from 8 years, computed rain duration (min) and accumulated rain water (mm). Rain intensity (mm h(-1)), mean drop diameter (D-m, mm) and total number concentration of raindrops (N-T, m(-3)) were calculated on each sampling interval and classified in to different bins.