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高原气象  2015 

基于双多普勒雷达及闪电资料分析一次强降水过程

DOI: 10.7522/j.issn.1000-0534.2014.00006, PP. 546-555

Keywords: 降水,双雷达,反演,云识别,闪电

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Abstract:

为进一步了解多普勒雷达及闪电资料在中小尺度天气系统方面的应用以及降水系统动力结构的研究,利用合肥和阜阳两部S波段多普勒雷达资料,通过两步变分反演法反演双雷达,并采用模糊逻辑算法进行云类型识别,再结合垂直累计液态水含量VIL、降水和闪电分布特征,分析了2010年6月710日发生在安徽合肥和阜阳的一次持续性强降水过程。结果表明:此次持续性强降水过程与风场的低层辐合和高层辐散、风场的气旋性旋转以及水平风切变相关;此次降水过程是以层状云降水为主的积云混合云降水;另外,以降水为主的层状云,其闪电频数低且以负闪为主,闪电之后20min左右出现强降水;此次暴雨的VIL值不是很大,强降水区对应的VIL值基本<3kg·m-2;云识别结果、降水区、VIL值与雷达回波强度之间的对应关系较好。

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