Abstract: In this paper, the two-dimensional numerical model are used for simulating the profiles of the potential temperature and specific humidity over homogeneous Gobi underlying surface under convective conditions. This result explains the observed fact that most of the profiles of the potential temperature and specific humidity. The model also gives a fair description of the time variation of the profiles of the potential temperature and specific humidity and the depth of the mixed layer. Comparison with observation shows that the results obtained from the numerical model are in good agreement with observations of the potential temperature and specific humidity, including the change of the depth of the mixed layer with time.

Key words: Gobi underlying surface, temperature and humidity profiles structure, numerical simulation

摘要： 本文利用二维大气边界层模式研究了平坦、均匀戈壁下垫面对流大气的位温和比湿廓线及其时间变化的垂直结构。与实测廓线资料比较表明，模拟结果基本反映了对流条件下，戈壁下垫面大气边界层中温、湿结构特征。

关键词: 戈壁下垫面, 温度和湿度廓线结构, 数值模拟