Mesoscale characteristics of the torrential rain over the Jianghan Plain in Hubei Province on 18 June
The NCEP GFS reanalysis data (resolution of 0.5° x 0. 5°) and surface observation and Doppler radar data were used to analyze the mesoscale systems of the torrential rain which occurred o ver the Jianghan Plain in Hubei on 18 June. Results show that the torrential rain was mainly caused by the deep low vortex over the Jianghan Plain, the dry line in the middle troposphereboundary layer and mesoscale low pressure on surface were the main trigger mechanism, and the southwest jet offered suffi cient vapor for the rain. After studying the radar echoes feature, it is found that the rain intensity was in good consistency with the vertical thickness of radar reflectivity factor above 45 dBz under 0℃ level and with the vertical integrated liquid value.
torrential rainwave filteringmesoscale vortexradar echodry line
国家科技期刊平台
NSTL
万方数据
维普
