副热带高压控制下三清山两次局地对流的分析

Analysis of Two Local Ground Convection in Sanqing Mountain under the Control of Subtropical High

副热带高压内部通常是晴朗多云的天气,但在特殊地形或天气条件下局部也会出现降水。本文分析了2017年两次副高控制下的三清山局地对流,结果发现,局地对流发生前,中低层水汽和不稳定能量已经较强,在三清山特殊地形的热力和抬升作用后发展迅速,形成较明显的短时降水。从雷达回波可以发现,雷达回波形状与三清山地形完全相符,而且发展迅速,回波强度大,造成短时较强降水。

The subtropical high is usually sunny and cloudy in the interior,but precipitation may also occur locally under special topography or weather conditions.This paper analyzed the local convection in Sanqingshan under the control of two subtropical high in 2017.It is found that before the local convection occurs,the middle and lower layers of water vapor and unstable energy are already strong,and they develop rapidly after the heat and uplift of the special terrain of Sanqing Mountain,forming a relatively short-term precipitation.From the radar echo,it can be found that the shape of the radar echo is completely consistent with the Sanqingshan terrain,and it develops rapidly,and the echo intensity is large,resulting in short-term strong precipitation.