2007年夏季咸阳机场雷雨预报技术

Techniques for Forecasting Summer Thunderstorms at Xianyang International Airport in 2007

根据实况资料利用客观分析方法对2007年西安咸阳国际机场遭遇的14次雷雨天气特点进行了分析。2007年的雷雨天气具有初雷时间早、雷雨次数多、维持时间长、强度大并伴随强降水等特点。根据各次雷雨的天气形势特点,将2007年咸阳机场的雷雨分为冷锋型、冷涡型和西北气流冷槽型,对3个天气分型进行了详细阐述。对8月8日强雷雨天气个例,分析了其形势场、能量场、物理量场和雷达回波特征,以及此次强雷雨发生发展的原因。

A detailed analysis is made of the synoptic features of the 14 thunderstorm events occurred in 2007 summer at Xi＇ an Xianyang International Airport through the objective analysis of conventional data. The results indicate that the 14 thunderstorm events can be divided into 3 types： cold front, cold vortex, and northwest current, and thunderstorms in 2007 summer have the features of earlier start, increased frequency, longer duration, higher intensity, and being accompanied with severe rainfall. In addition, a case study of the thunderstorm occurred on 8 August 2007, which caused heavy losses for flights delay and communication and navigation equipment destruction, is conducted. The causes for the occurrence and development of this thunderstorm are analyzed from the aspects of weather situation, energy features, physical quantity fields, and radar echoes.