两种垂直累积液态含水量产品的应用对比分析

结合雷达体扫工作模式以及风暴单体垂直结构分布，利用CINRAD气象产品软件包提供的基于单体和格点的VIL产品，对滨州SC雷达监测到的几例强对流风暴单体个例进行分析发现，两种VIL产品的变化趋势基本与风暴变化同步，对灾害性天气发生的预警具有较好的指示意义；一般情况下，基于单体的VIL数值大于基于格点的VIL数值，尤其是发展成熟、孤立的强风暴单体表现更加明显，可以作为判断风暴单体强度的定性指标；对于多单体风暴，由于风暴质心识别等因素会造成VIL数值误差增大，而雷达体扫模式的限制可能造成VIL数值失真。

Applied Comparison of Two Products of Vertically Integrated Liquid Water Content

By using the data of grid-based vertically integrated liquid water(VIL)and cell-based VIL,which were observed by Binzhou SC radar in volume scan mode,vertical structures of several severe convective storms were studied.The results show that the two VIL products varied in-phase with storm evolution,and they were both well indicative for warning damage weather.Generally,cell-based VIL is larger than grid-based VIL,especially in the case of mature and isolated severe cell storms.The difference of the two VIL products may be used as the quantitative indicator of cell storm intensity.The limitation of volume scan mode possibly leads to the VIL distortion,due to the increase of VIL errors caused by the identification of centroid of multicell storm.