北京市海淀区NO_2污染特征及气象要素关系分析研究

利用2006年-2009年北京市环境保护局海淀区香山站、万柳站和北部新区站的NO2资料和相对应的气象资料,对NO2的污染特征进行分析发现:NO2浓度达到三级的日数平均为5 d,呈逐年减少的趋势。NO2超标日分布在1-4月和10-12月,浓度峰值在上午10:00和19:00-23:00,谷值在上午7:00时,且节假日NO2浓度略高于工作日。通过相关分析,NO2的浓度随温度、风速、气压、降水量的增高而降低,随相对湿度的升高而升高,且偏南风易造成污染。

Research on Characteristics of NO2 Air Pollution and Relationship Between NO2 and Meteorological Elements in Beijing City Hiandian District during 2006- 2009

Using the NO2 and meteorological observational data of the three weather stations of Beijing Municipal Environmental Protection Bureau in Haidian District, Xiangshan Station, Wanliu station, the northern new District station from 2006 to 2009, this paper analyzes the pollution characteristics of NO2. The results showed that the number of days whose air quality was above Class 3 standard of air quality was an average of 5days in 2006 - 2009, which showed a decreasing trend year by year. The period overweight the peak concentration of NO2 distribution in 1 -4 months and 10 - 12 months, the concentration peak at about 10：00 am. and 19：00 pm to 23：00. The valley value appeared at 7：00 am, and during the holidays, NO2 concentration was slightly higher than the working days. Through the correlation analysis, the concentration of NO2 decreased with increasing the tempera- ture, wind speed, air pressure and precipitation, and increased with an increase of the relative humidity, and it was easily lead to pollution for the southerly wind