摘要
本文用实测温度梯度确定成都、重庆的大气稳定度频率，用Ｐ－Ｔ法的两种日、夜分界法统计大气稳定度频率；两种结果对比分析指出，ｈ＿１分界能更客观更精确地反映大气层结的实际状况。
The frequency of atmospheric stability in Chengdu and Chongqing is calculated by the tempraturegradient method，and the statistics on frequency of atmospheric stability is made by the P-T methodwith two diferent day- night divisions；The contrast between the two methods shows that the reSultobtained with division h_1 can represent the real state of the lower atmospheric structure.
关键词
环境气象学
大气稳定度
太阳高度角
日、夜分界
:Enviromental meteorology；Atmospheric stability；Solar altitude；Day -night division.
