Analysis of Characteristics of Atmospheric Structure Constant of Refractive Index Based on Wind Profiler Radar in Precipitation

摘要

The atmospheric structure constant of refractive index is an important parameter to describe the turbulent characteristics of the atmosphere. Using the ROBS data obtained by the Sichuan Provincial Meteorological Bureau in the Yanyuan, Dayi, Xinjin, Xindu, and Longquanyi districts, the real-time sampling of ROBS data combined with the hourly precipitation data provided by conventional meteorological observation stations was used for statistical analysis. Study the change trend of atmospheric structure constant of refractive index in the precipitation process in different regions. The results show that the convective movement during the precipitation process and the drag effect of the precipitation particles on the surrounding atmosphere, with the occurrence and development of the precipitation process, atmospheric structure constant of refractive index has a significant increasing trend, indicating the significance of precipitation. The vertical velocity and C~2_n are consistent with the change of precipitation, which can better reflect the change of precipitation intensity. The C~2_n value corresponding to the maximum precipitation time is two to five orders larger than that before and after the occurrence of precipitation.