广汉机场“8.11~8.12”暴雨过程分析  

Analysis of“8.11-8.12”Rainstorm Process at Guanghan Airport

作　　者：李瑶婷 LI Yaoting(Civil Aviation Flight University of China Guanghan College,Guanghan 618307,Sichuan,China)

机构地区：[1]中国民用航空飞行学院广汉分院,四川德阳618307

出　　处：《民航学报》2024年第3期108-111,共4页Journal of Civil Aviation

摘　　要：本文主要对2020年8月11~12日四川盆地的一次持续时间较长的夏季暴雨进行研究,重点分析了此次过程的环流形势、相当黑体亮度温度及有关物理量场。研究发现,在强降水中心主要位于川东地区的过程中,副高的显著西伸使得位于青海省的浅槽移动缓慢,从而造成广汉机场持续受槽前西南气流影响,700和850 hPa上发展加强的热低压也是造成此次暴雨持续时间长,强度大的原因之一;根据FY-2G卫星云图分析可知,此次降水为一次有极高云顶的发展旺盛的对流云降水;广汉机场上空相对湿度表现为上干下湿,整层以上升运动为主,近地面层为弱的下沉气流。This paper mainly studies a long-lasting summer rainstorm in the Sichuan Basin on August 11-12,2020,focusing on the analysis of the circulation situation,the Black Body Temperature and the related physical quantity fields of this process.The study finds that when the center of heavy precipitation was mainly located in the eastern Sichuan area,the significant westward extension of the subtropical high made the shallow trough in Qinghai Province move slowly,resulting in the continuous influence of the southwest airflow in front of the trough on Guanghan Airport,and the thermal low pressure which developed and strengthened at 700 hPa and 850 hPa was also one of the reasons for the long duration and great intensity of the rainstorm;according to the analysis of the FY-2G satellite cloud map,the precipitation was a vigorous convective cloud precipitation with extremely high cloud tops;the relative humidity over Guanghan Airport showed the top was dry and the bottom was wet,the whole layer was dominated by upward movement,and the layer near the ground was a weak downwardairflow.

关 键 词：夏季暴雨 广汉机场 对流 

分 类 号：P404[天文地球—大气科学及气象学]