摘要
为开展对高温酷热天气事件的研究 ,根据 2 0 0 2年 7月 15日我国华北大部分地区出现地面气温 >40℃的酷热天气 ,利用已有的各种观测资料 ,对酷热事件发生前和发生时的地面和高空天气形势进行了分析 ,并详细讨论了各物理量的时空分布情况。热力学方程各项因子的诊断分析表明 ,此次“酷热”事件是由于温度平流、温度垂直输送和非绝热加热 3个因子共同作用的结果。
A typical extreme high-temperature weather event warmer than 40℃ was observed in a large area of north China at 06UTC 15 July 2002. This event significantly influenced people's life, and attracted the news media's concern. In this paper, almost all available observational data are employed to document its evolutionary process and to investigate its mechanism. The synoptic situations from lower-level to upper-level prior to and during the high-temperature event are analyzed. Also, the spatial-temporal distributions of various variables are described. Through thermodynamics equation, it is indicated that this extreme high-temperature weather event was mainly caused by the joint effects of the advection of potential temperature, the vertical transportation of potential temperature and non- adiabatic heating.
出处
《中国海洋大学学报（自然科学版）》
CAS
CSCD
北大核心
2005年第2期183-188,205,共7页
Periodical of Ocean University of China
基金
国家自然科学基金项目 (40 2 750 33
40 2 4 0 4 2 0 564)资助
关键词
酷热事件
天气形势
热力学方程
太阳辐射
extreme high-temperature weather event
synoptic situation
thermodynamics equation
solar radiation
