Applicitation Test of Doppler Radar Data in Numerical Model ARPS

摘要

@@ 1.Introduction In Numerical weather forecast, whether the initial field is good have a direct impact on the forecast.ln the traditional numerical prediction, we choose routine meteorological observation data as the initial field, which lack the macroscopic and microscopic physics features of cloud for precipitation forecast, and this caused the problem called spin-up. Doppler weather radar can obtain the information within the cloud,such as radial wind speed and reflectivity, with high resolution that conventional observation data is incomparable. In recent years, there are more and more meteorologist at home and abroad studying the application of doppler radar radial velocity and reflectivity material into the high-resolution forecasting model. By simulating one rainstorm process around Jiangsu Province, based on ARPS model and its Data Analysis System ADAS and three-dimensional variational assimilation 3DVAR. we analyzed the impact of improving the initial field and getting better forecast results which brought by the two kinds of radar data added in differernt combinations.