珠江三角洲大气边界层温度与流场垂直分布特征

利用顺德地区1988年1月和7月大气边界层1500m内温度、风场资料,分析不同季节、不同稳定度的温度与风场廓线特征。研究表明,夏季温、风垂直增长率大、增值均匀;冬季近地层增长率特别大,向上趋平缓。逆温层在冬季的频率较高,而且在适当天气条件下出现的平流逆温持续时间亦相当长。温、风垂直分布较复杂,很难用直观的简易函数关系表示。因此,沿用各种经验公式时,必须注意在特定地区的实用性。

VERTICAL DISTRIBUTION CHARACTERISTICS OF TEMPERATURE AND WIND IN THE BOUNDARY LAYER OVER THE ZHUJIANG RIVER DELTA

Using an intensive observational data set of the lowest 1. 5km boundary layer , this paper analyzed the profiles of temperature and wind during different seasons and under different unstable conditions over the Zhujiang River delta area. The results show that the mean vertical change rates are great and regular in summer, while increase is very large with a gentle rising trend in the lowest surface layer in winter. Temperature inversion quite often happens, especially in winter, and can last for several days under certain favourable conditions. It is also shown that the vertical distribution of temperature and wind is far for simple, and very difficult to formulate in a simple function relationship. Thus , all empirical forrmulae have their local limitations.