北京地区严重污染状况下的大气边界层结构与参数研究

Study on the Boundary Layer Structure and Parameters under Heavy Pollution Conditions in Beijing

利用北京３２５ ｍ 铁塔资料对出现在１９９８ 年９ 月２６～３０ 日的一次严重污染过程的边界层结构和决定大气污染物扩散稀释的边界层参数作了分析和研究。分析发现， 这段时间边界层稳定层结占绝大多数， 白天在近地面的不稳定层结上还时有逆温盖， 另外在此期间风速较小。

The boundary layer structure and parameters of the heavy pollution process form September 26, 1998 to September 30 in Beijing are studied based on the observational data of the 325 m Beijing Meteorological Tower The study shows that stable conditions are the overwhelming majority and sometimes an inversion presents over the daytime unstable lower layer during this period The wind speed is rather small also A set of physical parameters which determines the turbulent state of the atmospheric boundary layer is calculated using these observational data