2006年6月10日浙江飑线FY-2C卫星云图特征

Analysis of FY-2C Satellite Images of the Thunderstorm 060610 in Zhejiang

利用FY-2C静止气象卫星云图和中尺度加密地面气象监测资料,采用Weiss-Smith方法、云顶亮温分层、多谱组合等定量分析技术对2006年6月10日发生在浙江中北部地区的一次冰雹和雷雨大风天气的飑线过程进行连续监测和对流云识别分析。FY-2C卫星云图定量分析结果表明这次飑线过程对流最旺盛期TBB低于230K(-44℃);长波红外分裂窗双谱组合Tc≤-4的低值区与强风暴天气影响区域相对应,Tc≤-7低值中心与强雷达回波区相对应;强对流天气区域与分布在沿对流云团前进方向的TBB梯度最大区域有很好的对应关系,强风暴天气发生区的移动路径与TV正梯度最大区域的移动路径相似。

By using FY-2C geo-stationary weather satellite cloud images, the ground meso-scale weather monitoring data and a series of techniques, such as Weiss-Smith method, layering of brightness temperature of cloud top and combination of multiple channel brightness temperatures, a quantitative analysis was performed for the hail and thunderstorm strong wind weather process that occurred in northern region of Zhejiang on June 10, 2006. The results of cloud image analysis show that the TBB is lower than 230K（ - 44℃） when the convection grows most prosperouslyand the area with the brightness temperature difference of lower than - 4℃ corresponds to the place where is most affected by the strong thunderstorm. The center of low value with Tc≤ 7℃ corresponds to the strong echo of radar. There is a good correspondence between the strong convective weather and maximum gradient of TBB, which distributes along the moving cloud duster. The moving path of strong storm is similar to that of the maximum positive gradient of Tv .