广东边界层气象条件及对大气污染的影响

本文讨论了广东一些主要城市边界层污染气象条件及其与浓度分布的关系。发现城市空气污染的长期平均状况与污染系数有很好的相关。风向脉动方差能够反映出湍流扩散的强度;混合层厚度及通风量对大气污染也有重要影响。通过分析和统计,确立了最大落地浓度计算方程,能够较方便地估计不同条件下一次最大落地污染浓度。

METEOROLOGICAL CONDITIONS IN BOUNDARY LAYER OVER GUANGDONG AND ITS INFLUENCE ON AIR POLLUTION

In this paper meteorological conditions in boundary layetes over some main cities of Guangdong, and their influence on pollutant concentrations are discussed. It is found that the long-term averages of concentrations are well correlative with pollution coefficients; the σ(θ) is able to express the turbulent diffusivity and the mixing height as well as ventilation factor have important influence on air pollution. Through the way of analysis and statistics, a equation for calculating the maximum ground concentration is derived; with which the maximum concentratons at surface level can be easily evaluated on various conditions.