中文摘要：

为进一步了解2009年6月5日发生在安徽的一次飑线天气过程的流场结构,本文将两步变分法应用于安徽省合肥多普勒天气雷达资料的风场反演,并利用反演结果检验发生冰雹、大风以及闪电等强对流天气过程的预警条件。结果表明,该次天气过程主要受到东北冷涡的影响,另外高空西北冷气流和地面暖气流以及深层的垂直风切变促进了该次飑线强对流天气的发生;冰雹、大风以及闪电等强对流天气对应的一些特征量关系符合相关预警条件。

英文摘要：

In order to make a further acquaintance about flow structure of a squall line that happened on June 5,2009 in Anhui Province,a two-step variational method was used to retrieve the wind field based on Hefei Doppler radar data.The derived winds and reflectivity were used to examine the early warning conditions about the strong convective weather such as hail,strong winds and lightning.The results indicate that the weather process was mainly influenced by the northeast cold vortex.Moreover,the northwest cold air current in the high altitude,southeast warm air in the low altitude and vertical wind shear promoted this strong convection weather process.The relevant characteristic parameters to some strong convective weather such as hail,strong wind and lightning were proved to be in accord with the early warning conditions for this squall line weather.