FY-4A产品在秦巴山区对流天气中的应用分析

Application Analysis of FY-4A Satellite Products in Convective Weather in Qinba Mountain Area

以秦巴山区一次强对流天气过程为例,分析中国新一代静止气象卫星FY-4A多种产品的特征,揭示FY-4A产品在山区复杂地形下,应用于当地对流检测的效果。结果表明:FY-4A的云顶高度、云顶温度产品可以反映出对流初生、平移和成熟的特征,而云高、云温变率效果更加明显,还能有效区分对流成熟和减弱;FY-4A的对流初生产品和闪电产品没有检测到这次强对流天气,只有在对流云水平尺度较大、与环境背景对比明显时才有显示;FY-4A的云顶高度、云顶温度产品及其变率可以作为秦巴山区本地化对流检测和短时强降水预警的支持数据。

Taking a strong convective weather process in Qinba Mountain area as an example,the characteristics of FY-4A products are analyzed.It reveals the effect of FY-4A products applied to local convection detection in complex mountainous terrain.The results show that the cloud top height and temperature products can reflect the characteristics of convective initiation,convective translation and convective maturation.The effect of cloud height and cloud temperature variability is more obvious,and it can also effectively distinguish the characteristics of convection maturation and convection weakening.FY-4A convective primary products and lightning products can detect the strong convective weather when the convective horizontal scale is large and the comparison is obvious with the environmental background.Therefore,the cloud top height,temperature products of FY-4A and their variability can be used as the support data for local convective detection products and short-term heavy rainfall warning in Qinba Mountain area.