利用烟团轨迹模式预测山区空气质量的研究

A Study on the Air Quality of Mountainous Area by a Smoke-puff Trajectory Model

本文建立了适合山复杂地形、中尺度范围的空气质量模式——烟团轨迹模式。在模式中考虑了地形、沉积、化学衰减和混合层顶多次反射等影响因素的作用。经过实测资料检验,表明模式具有较高的模拟能力。文中尝试将二维地面流场诊断模式输出风场引入烟团轨迹模式,用数值模拟的风场来决定烟团运行轨迹,估算长期平均浓度,弥补了单站实测地面风资料之不足。

In the paper the problem of how to predict the air quality of the mesoscale mine area over complex terrains has been discussed. First, the paper puts forward a smoke-puff trajectory model in which topography, deposition, chemical elimination and reflex effects within the mixture layer have been taken into consideration. By comparison, the arsult of the model is proved to be approximately same as that presented in the observation data. Secondly, by means of this model the average long-term concentration can be calculated according to the result obtained by a two-dimensional mesoscale model for diagnosing surface wind fields. In this way the models are capable not only of remedying the defect of the single station monitoring surface wind but of presenting the pollutant transmission over complex terrains more exactly.