一次副高边缘强对流天气的水汽图像特征

利用惺水汽图像、红外云图和常规天气资料，对１９９８年８月１０日凌晨发生在山东半岛东部的副高边缘强对流天气进行了诊断分析。结果表明：高空弱冷空气侵入、副高西北部边缘减弱东移、副高边缘８５０ｈＰａ风的辐合、山东半岛对流不稳定环境的有利于强对流天气发生、发展，强对流天气发生在水汽图像最白亮区域与红外云图对流云团西端的重合区。

Water Vapor Imagery Features of a Convective System on the Edge of Subtropical High

By using of satellite water vapor imagery, the IR picture and conventional observation,the convective system on the edge of subtropical high in the east of Shandong Peninsula in 10 August 1998 was diagnosed.The results show that these factors, such as the upper week cold air intrusion, weaking and moving to the east of the northwest edge of subtropical high, the 850hPa wind convergence on the edge of subtropical high and the convective instable atmosphere structure over Shandong Peninsula,were beneficial to development of the convective system.The convective systems occurred both in the brightest area of the satellite water vapor imagery and in the wester end of the convective clouds of the IR picture.