摘要
利用MICAPS探空及地面资料和多普勒雷达资料对4月20日梅州南部发生的一次冰雹过程进行分析,结果表明:梅州这次冰雹过程是在200 hPa高空急流右侧扇形辐散流场、500 hPa高空槽前、低层切变线及南侧强西南急流和地面冷暖气流交汇下产生;上干冷下暖湿层结条件、较大的垂直风切变和较大的CAPE值和适宜雹胚发展的0℃层和-20℃层高度均有利于冰雹(强对流)的发生发展;多普勒雷达上冰雹风暴以偏东移动为主,组合反射率因子强度维持在65 dBz以上,VIL值在50 kg/m^2以上,强回波中心随高度向移动方向右侧倾斜,径向速度图上中气旋特征并不明显,以期能本文研究分析结果能为冰雹天气的预测与预防提供一定的参考..
Using MICAPS sounding and ground data and Doppler radar data,a hail process in southern Meizhou on April 20 was analyzed.The results show that the hail process is at 200 hPa high altitude jet stream on the right side of the fan flow field divergence,the 500 hPa upper trough top,low-rise shear line and the south southwest jet under intersection and ground temperature and air flow;the formation and development of hail(severe convection)were facilitated by the warm and wet stratification conditions,the large vertical wind shear,the large CAPE value and the height of 0℃and-20℃layers suitable for hail embryo development.On the Doppler radar,the hail storm mainly moves to the east,the intensity of combined reflectance factor is maintained above 65 dBz,and the VIL value is above 50 kg/m2.The strong echo center tilts to the right with the direction of movement along with the height,and the mesocyclone characteristics are not obvious in the radial velocity diagram.The results of this paper can provide reference for the prediction and prevention of hail weather.
作者
赖师美
张达文
LAI Shi-mei;ZHANG Da-wen(Meteorological bureau of Pingyuan,Pingyuan 514600,Guangdong,China;Meteorological bureau of Meizhou,Meizhou 514021,Guangdong,China)
出处
《韶关学院学报》
2020年第6期84-89,共6页
Journal of Shaoguan University
