夏季对流参数特征对广汉机场一次较典型雷暴过程的检验  

Verification of the Characteristics of Summer Convection Parameters on a Typical Thunderstorm Process at Guanghan Airport

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

机构地区：[1]中国民用航空飞行学院广汉分院,四川广汉618307

出　　处：《民航学报》2021年第5期44-45,78,共3页Journal of Civil Aviation

摘　　要：本文主要利用MICAPS资料中高、低空实况、探空资料对2020年7月29日清晨广汉机场的一次雷暴过程做了相应的分析。1)通过分析7月28日20时不同高度层的环流形势可知,500 hPa广汉机场附近存在风向的切变;自850~700 hPa风向随高度顺转,说明对流层低层有暖平流存在;地面形成弱的气压梯度。根据探空资料可知,在4 000 m高度附近有逆温层存在,这进一步有利于对流层低层不稳定能量的累积。2)验证了在广汉机场夏季7月,当A≥10,K≥39,SI≤-1.5,ΔCAPE≥1 000时,在有利天气形势的配合下,本场极可能产生雷暴的结论。Using the data of high and low air reality and sounding of MICAPS, this paper analyzes a thunderstorm process at the Guanghan Airport in the early morning of July 29, 2020(1). By analyzing the circulation situation at different altitudes at 20:00 on July 28, it can be seen that there was a wind direction shear near the 500 hPa at the Guanghan Airport;the wind direction from 850 hPa to 700 hPa changed with the height, which indicates that there was a warm advection in the lower troposphere;a weak pressure gradient was formed on the ground. According to the sounding data, there was an inversion layer near the 4 000 m height, which was further conducive to the accumulation of unstable energy in the lower troposphere.(2) It is verified that in July at the Guanghan Airport, when A≥10, K ≥ 39, SI ≤-1.5 and ΔCAPE ≥ 1 000, with the cooperation of favorable weather conditions, thunderstorms are very likely to occur at the Guanghan Airport.

关 键 词：对流参数 广汉机场 夏季雷暴 检验 

分 类 号：P456.8[天文地球—大气科学及气象学]