浦东机场2019年初雷天气过程分析  

Analysis of 2019 First Thunderstorm Weather Process at Pudong Airport

作　　者：傅毅 FU Yi(East China Air Traffic Management Bureau of CAAC,Shanghai 200335,China)

机构地区：[1]中国民用航空华东地区空中交通管理局,上海200335

出　　处：《民航学报》2021年第3期53-58,共6页Journal of Civil Aviation

摘　　要：利用常规地面观测资料、卫星云图、雷达资料和NCEP再分析资料,定量分析了2019年4月9日发生在上海地区一次初雷天气的发生、发展和移动过程,结果表明:1)地面及低空切变线提供了低层的辐合条件,锋前低压带中生成的辐合体,在高空西南气流的引导下向东移动,高空槽前倾使天气系统东移速度加快;2)定量研究初雷发生前的物理量发现,地面相对湿度大于80%,850 hPa和925 hPa有明显暖平流输送,归一化对流有效位能CAPE的值达到1.1,具备了雷雨发生的三要素;3)卫星和雷达图显示对流云图南北向长度为250 km,东西向宽度为30 km,最强处为55~60 dbz,对浦东机场影响时长约2 h。Based on the ground observation data, satellite cloud images, radar data and NCEP reanalysis data, a quantitative analysis of the first thunderstorm in Shanghai area on April 9, 2019 is carried out. The results show that:(1) The ground surface and the low-level shear lines provide convergence conditions in the lower layer. The convergence formed in the low-pressure zone in front of the front moves eastward under the guidance of the high-altitude southwest air flow. The eastward movement speed of the weather system is accelerated by the forward inclination of the highlevel trough.(2) Quantitative study on the physical quantities before the first thunderstorm occurred shows that the relative humidity of the ground is more than 80%, there is obvious warm advection transport at 850 hPa and 925 hPa, and the value of normalized convective effective potential energy reaches 1.1.(3) Satellite and radar images show that the length of convective cloud in the north-south direction is 250 km, the width in the east-west direction is 30 km, the strongest part is 55~60 dbz, and the impact on Pudong Airport lasts for about 2 hours.

关 键 词：机场初雷 中尺度云团 天气形势 物理量分析 

分 类 号：P456.8[天文地球—大气科学及气象学]