Characteristics of Severe Rainstorm Occurred on the 17th June,2013 in WenSu of Xinjiang Based on Doppler Radar
Based on conventional observation and Doppler radar data, the large-scale circulation and radar echo characteristic of a severe rainstorm,which happened during 17th June, 2013 in WenSu of Southern Xinjiang was analyzed. The results showed that the severe rainstorm generated in favorable weather situations. The Balkhash lake trough, middle-lower layer and ground mesoscale shear line cooperated made the severe rainstorm happen. The rainstorm was caused by two typical band-shaped meso-scale systems, which moved repeat along Wensu. The convection cells move in the same direction with one of the echo-band,the other had an angle of 60~90. As a result, the former echo-band played a more important role in the Wensu rainstorm. Reflectivity of convection cells is less than or equal to 40 dBz,with top height below 7 km, and center located in lower part of the cloud. Before and during the rainstorm, many adverse wind areas appeared in radial velocity. It may suggest a significant relevance for monitoring and nowcasting in heavy rainfall. When the rainstorm occurred, the vertical wind would clockwise rotation with height, and the thickness of the convergence zone would increase, which may provide a favorable environmental conditions for initiation and development of a rainstorm.
国家科技期刊平台
NSTL
万方数据
维普
