Analysis of a Strong Convective Weather Process in Anhui Province
Based on the Hefei new generation of weather radar products and conventional observation data,a strong convective weather process in Anhui Province on June 5,2009 was analyzed from the aspects of weather conditions,unstable energy,satellite cloud images and radar echoes,revealing that such strong convective weather formation mechanism.The results showed that there was an upward trough at high altitude and a strong vertical temperature gradient at high and low altitudes,strong cold air was brought south under the strong northeast cold vortex;850-100 hPa were consistent with north-northwest dry airflow,there was a shear line at 925 hPa over the eastern part of Hetao;Ground energy accumulation was obvious and there were two obvious composite lines.The perfect combination of high and low altitude caused by the strong convective weather process intensity,wide range,fast moving speed,great harm.Ground composite lines caused by sea breeze front in Shandong and Jiangsu Province may trigger and strengthen the strong convection.Pre-northeast cold vortex and continued high temperature of East China for the occurrence of strong convection had accumulated a lot of unstable energy.Analysis of the Hefei station radar chart found that the 0.5-degree elevation reflectance factor map on the appeared time and passing area of gust front corresponding to the time and place of gale occurrence had good instructions,which can issue gale warnings 20-30 minutes in advance.
国家科技期刊平台
NSTL
万方数据
维普
