广东沿海地区大气稳定度及其分类探讨

A Study of the Atmospheric Stability and Stability Classifying Schemes in the Coastal Region of Guangdong

利用广东沿海１个１００ｍ气象铁塔的逐时风向、风速和温度梯度观测资料及地面自动气象站资料，分析研究沿海地区的大气稳定度及其分类方法．结果表明，沿海地区大气稳定度应区分为地面、垂直和水平大气稳定度．地面大气稳定度由常规Ｐａｓｑｕｉｌ－Ｔｕｒｎｅｒ方法确定，垂直大气稳定度由温度梯度确定。

The atmospheric stability and its classifying schemes in terms of the Pasquill A F classes have been analysed by using the data obtained froma 100 m tower located in the coastal area of Guangdong Province. Wind and temperature sensors were mounted on the tower at 10, 25, 50, 75, 100 m levels, respectively. Radiation sensors were mounted only at the ground level. Hourly averaged values of total radiation, net radiation, wind speed and standard deviation of horizontal wind direction as well as temperature and vertical temperature difference were obtained from December 1, 1992 to November 30, 1993. The results indicate that the atmospheric stability in the coastal region should be classified into ground level stability (GS), vertical stability (VS) and horizontal stability(HS).The GS can be determined by the Pasquill Turner method, the VS determined by the temperature lapse rate and the HS determined by the σ θ method.