摘要
利用重庆市17个国控点实时发布的监测数据,对SO2与NO2污染特征、时间变化规律以及与气象影响因素的相关性进行了研究分析。结果表明:2013年SO2和NO2质量浓度的年均值分别为32μg·m-3和38μg·m-3,满足国家年均值Ⅱ级标准。SO2的质量浓度呈两头高中间低的"μ"型分布,月均值变化趋势明显;而NO2的质量浓度呈现波浪形变化。SO2与NO2峰值分别出现在2013年12月(49μg·m-3)和9月(47μg·m-3)。重庆市2013年SO2的质量浓度与降雨量极显著相关,与平均大气压、平均气温显著相关。SO2浓度更易受到近地面气象因子降雨量、平均温度、平均气压的影响而积累或扩散;而NO2浓度更易受到近地面气象因子平均相对湿度的影响而积累或扩散。2013年全年偏西风时对SO2的污染起着主要的清除作用,东风时对NO2的污染起着主要的清除作用。
The paper analyzed pollution characteristics , variation trend and relativity of SO2 and NO2 from Chongqing seventeen national control sites according to utilizing real - time date obtained from January 2013 to December 2013. The result showed that the annual average SO/and NO2 respectively reached 32μg·m^-3 and 38μg·m^-3 and succeed to meet new Grade II national air quality standards in 2013. The concentration of SO2 was high middle low ＂U＂ type distribution , Monthly mean variation trend is obvious and the mass concentration of NO2 is in a wave shape change. SO2 and NO2 peak value were presented in December （49μg·m^-3 ） and September （47μg·m^-3） in 2013. The concentration of SO2 and the rainfall is extremely significant correlation, and the average atmospheric pressure, average temperature is significantly correlated in 2013. When accumulation or diffusion of SO2 and NO2, the concentration of SO2 was more easily influenced by precipitation, average temperature, average pressure and the concentration of NO2 was more easily influenced by the average relative humidity in 2013. Westerly to the pollution of SO2 plays a major role in scavenging and East wind to the pollution of NO2 plays a major role in scavenging.
出处
《环境与可持续发展》
2015年第4期173-175,共3页
Environment and Sustainable Development
关键词
SO2
NO2
气象因子
影响
SO2
NO2
Meteorological factors
Influence
