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利用机场自动观测系统和新一代多普勒天气雷达等资料,对2012年9月1日和2013年7月1日发生在长沙黄花国际机场的两次对流性风暴天气过程进行对比分析,结果表明:2012年9月1日的对流风暴属于普通单体风暴,2013年7月1日的对流风暴属于多单体风暴。两次对流性风暴的共同特征有在较短时间内均产生>20m/s的地面大风(>17m/s),并出现了风速急增、风向突变、气温骤降、气压涌升等气象要素的剧烈变化,两次对流性风暴都是副高外围的东风波扰动触发形成的。
Based on the data of automatic observing system of the airport and Doppler weather radar of the new generation, comparative analysis of the two convective storms occurred on September 1, 2012 and July 1, 2013 in Changsha Huanghua International Airport showed that : The convective storm on September 1, 2012 is a common single storm. The convective storm on July 1, 2013 is a multi-unit storm. The common characteristics of the two convective storms are:> 20m / s ground wind (> 17m / s) in a relatively short period of time, and meteorological elements such as rapid increase of wind speed, sudden change of wind direction, sudden temperature rise and pressure surge The two convective storms are triggered by the disturbance of Dongfeng wave in the subtropical high.