【摘要】 本文在物理化学模式的基础上讨论了雨滴对云下污染气体SO₂、H₂O₂、O₃、NH₃、CO₂的冲刷过程。除了H₂O₂、O₃与S（Ⅳ）的液相化学反应以外,还考虑了Fe³⁺、Mn²⁺的催化氧化作用。计算结果表明:（1）存在雨滴SO₄^2-浓度谱和PH值谱的可能性;（2）云下气体冲刷决定于下列因子:雨滴内污染物的初始浓度、降水强度和NH₃气体浓度等;（3）模式结果可用于解释一些观测现象。更多还原

【Abstract】 The process of scavenging below-cloud pollutants （SO₂, H₂O₂, O₃, NH₃, CO₂）by raindrops is studied,based on a physico-chemical model. Besides the aqueous oxida-tiom of S（Ⅳ） by H₂O₂ and O₃,the catalyic oxidations of S（Ⅳ） by Fe³⁺ and Mn²⁺ in thefalling drops are also considered. Results indicate: （1）the[SO₄^2-] and pH spectra can bede developed; （2）the scavenging process below clouds is influenced by a number of fac-tors: initial concentration of pollutants in the raindrops,precipitation intensity and NH₃concentration, and （3） this study can be uded for explaining some phenomena observedfrom field measurements.更多还原