基于卫星云参数监测产品的贵州冰雹云指标分析

Hail cloud index analysis in Guizhou based on satellite cloud parameter monitoring products

利用2018年贵州省12个冰雹个例资料,基于CPAS系统统计分析了冰雹个例的云顶高度、云顶温度、云有效粒子半径、云光学厚度、黑体亮温等卫星云监测产品的特征参数及其时间变化。结果表明:发生冰雹时回波云顶高度均在9 km以上,云顶温度均在-25℃以下,液水含量均在800 mm以上,云光学厚度均在40以上,发生冰雹时有效粒子半径大部分均在40μm以上,当Tbb达到-50℃且半小时内保持不变,对流云团对应的区域即将发生降雹,可考虑将其作为贵州省即将出现降雹的卫星监测指标判据。

Frequent natural disasters,the meteorological disasters caused by the loss of natural disaster loss of more than 85%,the hail is one of the most main severe weather in the province,to the local crops,such as houses,communication impact using the data of 12 hail alone in 2018 in Guizhou province,based on statistical analysis of the CPAS system an hail cloud top height(Ztop),cloud top temperature(Ttop),cloud particle effective radius(ref),cloud optical thickness(optn),black body light temperature(Tbb)satellite cloud monitoring products such as characteristic parameters and the time change.The results show that when the hail cloud echo top height all above 9 km,cloud top temperature below 25℃,liquid water content being above 800 mm,the thickness of the cloud optical above 40,hail occurs most effective particle radius in more than 40 microns,when Tbb reaches to 50℃remains the same,and half an hour convective cloud coming down the hail,the corresponding area can consider it as coming down in Guizhou satellite monitoring index of the hail criterion.