南京SO_2、NO_2和PM_(10)变化特征及其与气象条件的关系  

The Variety of Main Air Pollutants Concentration and Its Relationship with Meteorological Condition in Nanjing City

作　　者：魏玉香 童尧青[2] 银燕[2] 陈魁[2] 

机构地区：[1]南京市环境监测中心,江苏南京210013 [2]南京信息工程大学中国气象局大气物理与大气环境重点开放实验室,江苏南京210044

出　　处：《大气科学学报》2009年第3期451-457,共7页Transactions of Atmospheric Sciences

基　　金：江苏省自然科学基金资助项目(BK2006226);南京市环境保护局环保科技项目(200609)

摘　　要：利用南京市2002—2006年大气监测资料,分析了南京市大气中SO2、NO2、PM10年变化趋势及月季规律,评价了南京市空气质量状况。结果表明:5a来,SO2质量浓度呈显著上升趋势,NO2质量浓度缓慢上升,PM10质量浓度明显下降;南京市首要污染物是PM10,SO2、NO2污染较轻;3种污染物质量浓度均以夏季最低。进一步研究不同气象条件下污染物质量浓度发现,污染物质量浓度与风速反相关,且东南风时浓度最高;降水对污染物有清除作用;雾、霾天气下污染加剧;气象能见度与PM10、NO2的质量浓度反相关;污染物有明显的"周末效应",周末质量浓度值较低。The annual tendency, monthly and seasonal distribution of main air pollutants SO2, NO2 and PM10 and the quality of the atmosphere in Nanjing have been analyzed based on the atmospheric monitoring data from 2002 to 2006. The results show that, during the last five years, there have been a considerable increase in SO2, a remarkable decrease in PM10, and a slight increase in NO2 mass concentrations. PM10 was the dominant pollutants while the mass concentration of SO2 and NO2 were relatively low. All of the three pollutants presented minimum mass concentrations in summer. A comparison of the mass concentrations of the three pollutants under different meteorological conditions has revealed that a negative correlation existed between the concentrations of pollutants and wind speed and the maximum mass concentrations of pollutants were generally observed when the wind was blowing from the south- east. Precipitation had important cleanup effect on pollutants, while a worse situation occurred during haze or fog days. A negative correlation also existed between the visibility and the mass concentrations of PM10 or NO2. The air pollutants showed a ＂Weekend Effect＂ that their mass concentrations were ob- viously low during the weekends.

关 键 词：南京市 大气污染 SO2 NO2 PM10 气象条件 

分 类 号：X16[环境科学与工程—环境科学]