广西“98.6”暴雨过程的Q矢量分析及落区预报

The Q Vector Analysis And Falling Area Forecast Of "98.6" Torrential Rain In Guangxi

应用 Q矢量理论对 1998年广西 6月 16～ 2 6日连续性暴雨过程进行诊断分析 ,共分析了 11个时次的 85 0h Pa Q矢量散度、锋生函数等诊断场 ,揭示了广西“98.6”连续性暴雨期间 Q矢量散度场和锋生函数场的分布特征 ,以及与中低空主要天气系统和暴雨带之间的时空配置关系 ,指出 Q矢量散度场对广西“98.6”

This article diagnoses and analyzes the continuous torrential rain happened on June 16~26,1998 in Guangxi by adopting Q vector theory. Diagnosis fields such as 850 hPaQ-vector divergence and frontgenesis function in 11 torrential rain cases are analyzed, disclosing the distribution characteristics of Q-vector divergence field and frontgenesis function field, as well as the space-time relationship between the main weather system on the middle and low layers in troposphere and belt of torrential rain. The result shows that there is relatively corresponding relationship between Q divergence field and the '98 6'falling area of torrential rain in Guangxi.