北京市典型社区空气污染物变化特征分析

Variation Characteristics Analysis of Atmospheric Pollutants in Typical Communities in Beijing

基于北京市门头沟区葡东社区的大气污染物定位监测站的监测数据,研究评价2017—2018年北京典型社区空气污染物变化特征。结果表明:(1)4个季节各污染物日变化特征为:NO、NO_(X)浓度的日变化曲线为双峰型,峰值时间为7:00—8:00和20:00—23:00;NO_(2)、O_(3)、SO_(2)浓度日变化曲线为单峰型,峰值时间为15:00—16:00;CO日变化曲线无明显规律;(2)各污染物月季变化特征为:O_(3)、SO_(2)、CO、NO_(X)月变化曲线分别在6月、2月、1月、3月,峰值分别为60.32×10^(-9)、2.96×10^(-9)、4209.81×10^(-6)、42.15×10^(-9),最低值分别出现在10月、7月、3月、8月,谷值分别为11.75×10^(-9)、0.05×10^(-9)、1052.37×10^(-6)、10.99×10^(-9);O_(3)季平均体积分数为夏、春>冬、秋,CO季平均体积分数为冬>秋>夏>春,NO季平均体积分数为春、秋、冬>夏,NO_(2)季平均体积分数为春>夏、秋>冬,NO_(X)季平均体积分数为春>秋>夏、冬,SO_(2)季平均体积分数为冬>春>秋>夏;(3)冬季供暖季SO_(2)、CO体积分数显著高于非供暖季,NO、NO_(2)、NO_(X)体积分数显著低于非供暖季。研究得出气象和居民出行是影响社区空气污染变化的两大重要因素。

Based on the monitoring data of the atmospheric pollutant location monitoring station in the Pudong Community of Mentougou district in Beijing,the characteristics of atmospheric pollutants in typical communities in Beijing from 2017 to 2018 was studied.The results show that:(1)Diurnal variation of pollutant concentration in different time:The diurnal variation curve of NO and NOX concentration is bimodal type,the peak time is 7:00-8:00 and 20:00-23:00;The diurnal variation curve of NO2,O3 and SO2 concentration is unimodal,the peak time is 15:00-16:00;there is no obvious regularity of CO diurnal variation curve;(2)The monthly variation of pollutant concentration:the highest value of O3,SO2,CO,NOX concentration appear at June,February,January and March respectively,the corresponding peak value is 60.32×10-9,2.96×10-9,4209.81×10-6,42.15×10-9;the lowest values appear at October,July,March and August respectively,the corresponding valley value is 11.75×10-9,0.05×10-9,1052.37×10-6,10.99×10-9;the seasonal variation of O3 concentration is summer and spring>autumn and winter,CO is autumn>winter>summer>Spring,NO is spring,autumn,winter>summer,NO2 is spring>summer,autumn>winter,NOX is spring>autumn>summer and winter,SO2 is winter>spring>autumn>summer;(3)the SO2 and CO concentrations in the winter heating season are significantly higher than the non-heating season,and the NO,NO2,and NOX concentrations are significantly lower than the non-heating season.