广汉机场一次秋季强对流天气分析  

Analysis of a Severe Convective Weather in Autumn at Guanghan Airport

作　　者：杨芮竹 闫克斌[1] 王钦[1] 吴俊杰 YANG Ruizhu;YAN Kebin;WANG Qin;WU Junjie(Guanghan College of Civil Aviation Flight University of China,Guanghan 618307,Sichuan,China;School of Aeronautical Meteorology,Civil Aviation Flight University of China,Guanghan 618307,Sichuan,China)

机构地区：[1]中国民航飞行学院广汉分院,四川广汉618307 [2]中国民航飞行学院航空气象学院,四川广汉618307

出　　处：《民航学报》2022年第6期79-81,160,共4页Journal of Civil Aviation

摘　　要：本文利用常规观测资料、探空资料和多普勒气象雷达资料对2021年9月24日发生在广汉机场的一次秋季强雷暴事件进行了诊断分析。结果表明:本次强对流过程中,500 hPa短波槽、700 hPa切变线和850 hPa暖式切变为对流的触发提供了有利于的抬升条件;副高边缘强盛的西南气流提供了充足的水汽,500 hPa以下处于显著湿区,使得该地区具备了对流发生所需要的水汽条件;对流层上层冷平流对应对流层低层暖平流,有利于层结不稳定;K指数、LI指数以及CAPE指数均达到了强对流天气和强降水的阈值。Based on conventional observation data, radiosonde data and Doppler weather radar data, this paper makes a diagnostic analysis of an autumn thunderstorm at Guanghan Airport on September 24, 2021. The results show that the 500 hPa short-wave trough, 700 hPa shear line and 850 hPa warm shear provide favorable lifting conditions for the triggering of convection;the strong southwest air flow at the edge of the western Pacific subtropical high provides sufficient water vapor so that the area below 500 hPa is in a significantly wet condition, which provides this area the water vapor conditions required for convection;the cold advection in the upper troposphere corresponding with the warm advection in the lower troposphere is beneficial to stratification instability;besides, K index, LI index and CAPE index all reach the threshold of strong convective weather and heavy precipitation.

关 键 词：秋季 强对流 天气分析 

分 类 号：P446[天文地球—大气科学及气象学]