【摘要】 利用西安城郊PM2.5、PM10、SO2、NO2等污染物逐小时浓度和常规气象观测资料,通过分析2014年春节期间大气环流形势、近地面大气层温度等要素及空气质量浓度的时空变化特征,讨论了烟花爆竹燃放对环境空气的影响。结果表明:2014年春节期间西安高空受西北气流控制,地面处于低压中心,等压线稀疏,风力较弱;近地面大气连续4天出现平均高度980 m的接地逆温,低空受东北气流控制,气象条件非常稳定;燃放烟花爆竹产生的特征污染物主要有PM2.5、PM10、SO2和CO等,PM2.5、PM10和SO2在除夕集中燃放时达到浓度最高值,分别是前期稳定状态下平均值的1.5、1.84和1.17倍;燃放烟花爆竹对PM10浓度的影响最大,其次为PM2.5;冷空气作用对粒径较小的PM2.5清除效果较好。更多还原

【Abstract】 On the basis of measured data of hourly pollutant concentration such as PM2. 5,PM10,SO2,NO2,etc of Xi’an and the related observation data,the effect of the air quality of the environment by fireworks during the Spring Festival of 2014 is discussed by analysis on the variation characteristics in time and space of atmospheric circulation situation,near ground atmospheric temperature and air quality concentration. The results shows that Xi’an upper under northwest airflow control,and the ground is in a low-pressure center,the isobar is sparse and the wind is weak. The near ground atmospheric appared ground inversion last for 4 days which average height is 980 m low altitude under northeast airflow control and the meteorological conditions is very stable. The main pollutants produced by fireworks display include PM2.5,PM10,SO2 and CO,etc,and the concentrations of PM2. 5 PM10 and SO2 reached the maximum on new year’s Eve,which is 1. 5,1. 84 and 1. 17 times of the average value under the stable conditions at early days. The fireworks display has the most influence on PM10,then is the PM2. 5. Also the cold air has better effect on clearing the PM2. 5.更多还原