关键词: 三分量风速仪, 湍流度, 稳定度, 扩散参数

Abstract: Xuejiadao area in Tsingdao city in July 1993 and in Changping suburban, Beijing in April 1994. The instrument used for observation is three-component anemonmeter. Following Draxler′s empirical formula, the diffusion parameters of Tsingdao area and Changping area are calculated. Meanwhile the calculation formula suitable for the two areas is put forward and the results are compared with Pasquill′s. It is found that the diffusion parameter of coastal area of Tsingdao is a little lower than the inland ones. Moreover, because of the different roughness of underlying surface and thermodynamic conditions, the diffusion characters are distinctly different between coastal area and inland, as well as between off-sea wind and off-shore wind.

Key words: three-component anemometer, turbulence intensity, stability conditions, diffusion parameters