The West African Squall Line Observed on 23 June 1981 during COPT 81: Kinematics and Thermodynamics of the Convective Region
The West African Squall Line Observed on 23 June 1981 during COPT 81: Kinematics and Thermodynamics of the Convective Region
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1981 年 6 月 23 日 COPT 81 期间观测到的西非飑线：对流区域的运动学和热力学
DOI：
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发表时间：
1988
期刊：
影响因子：
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通讯作者：
F. Roux
中科院分区：
文献类型：
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作者：
F. Roux
1981年6月23-24日夜间观测到的飑线是1981年5 ~ 6月法国和科特迪瓦研究机构在科特迪瓦北方科霍戈进行的COPT 81（热带对流）试验中最强的一次。风暴前的环境中有一个非常大的对流不稳定，在最低层有一个稳定层。中层空气干燥，促进对流下沉气流的发展，以及强烈东风的异常低高度，协助6公里以上的领先砧的发展，是这条飑线环境的两个值得注意的特征。根据雷达资料推断，其中尺度结构与先前观测到的热带飑线相似。对流上升气流和下降气流发生在领先的强降水区（对流区），中尺度上升气流和下降气流被发现内和下方的尾部中高层砧云，...
Abstract The squall line observed during the night of 23-24 June 1981 was one of the most intense events during the COPT 81 (COnvection Profonde Tropicale) experiment, conducted in May and June 1981 at Korhogo in the northern Ivory Coast by French and Ivorian research institutes. The presquall environment possessed a very large convective instability with a stable layer in the lowest levels. The presence of dry air in the midlevels, which promoted the development of convective downdrafts, and the unusually low altitude of the strong easterly winds, which aided the development of a leading anvil above 6 km, are two noteworthy characteristics of the environment of this squall line. Its mesoscale structure, as deducted from radar data, is similar to that previously observed for tropical squall lines. Convective updrafts and downdraft occur in the leading heavy precipitation region (convective region) and a mesoscale updraft and downdraft is found within and below the trailing mid-to upper-level anvil clouds,...