北京市春季沙尘暴天气大气气溶胶污染特征研究

Study on pollution characteristics of aerosols during sand-dust storm weather in Beijing

采集并分析了北京市 2次沙尘暴天气和非沙尘暴天气TSP(总悬浮颗粒物 ,<10 0 μm)、PM10 (可吸入颗粒物 ,<10 μm)的质量浓度、离子浓度、元素浓度等 .研究结果表明 ,发生沙尘暴时大气气溶胶的污染水平极高 ,这种情况在北京市只有发生沙尘暴时才可能出现 ;地表扬尘对大气气溶胶的贡献显著 ,显示出沙尘暴时的污染特征 .

In the spring of 2000,there were 12 sand-dust storms that brought enormous impacts to atmospheric environment and daily life in Beijing.2 sand-dust storms were experienced in this study.Mass concentrations,ionic concentrations,elementary concentrations and etc of TSP(total supspended particulate,<100*!μm)and PM 10(inhalable particulate,<10*!μm)were sampled and analyzed.Results showed that pollution level of aerosols was extremely high and such kind of serious pollution only occurred during sand-dust storms.Contribution of ground dust to aerosols was very significant,which might be the pollution characteristics of sand-dust storm in Beijing.