摘要
对成都市城区O_3、SO_2、NO_X、CO、PM_(2.5)、PM_(10)、苯和甲苯进行了为期一年的在线观测。结果表明:成都市超标最严重的为NO_X,年平均质量浓度为(100. 9±61. 5)μg/m3,超标天数为119 d。PM_(2.5)、PM_(10)、CO和NO_X的浓度均为冬季最高; O_3春夏季高而冬季低; SO_2浓度冬季相对较高但总体水平较低。春、夏、秋季成都市大气中苯系物的主要来源为机动车,冬季则是机动车源和燃烧源的综合贡献。O_3日变化呈"单峰型"; NO、苯和甲苯都在上午出现峰值; NO_2与PM_(10)、PM_(2.5)均呈现出"双峰双谷"型日变化; CO也为双峰型日变化。各大气污染物浓度没有明显"周末效应",但"长假效应"显著。
The concentrations of O3,SO2,NOX,CO,PM2.5,PM10,benzene and methylbenzene were monitored and observedfor one-year in this study.The results showed that the most serious pollutant is NOX during the observation period,with theannual average concentration of(100.9±61.5)μg/m3,and there were119days that NOX concentrations exceeded the theNational Ambient Air Quality Standards.The concentration of PM10,PM2.5,CO and NOX were highest in winter,and O3washigh in spring and summer and low in winter,while SO2concentration was higher in winter but the overall concentration wasgenerally low.The main source of atmospheric benzene series in spring,summer and autumn in Chengdu was the motor vehicleemission,while in winter the contribution of motor vehicle sources and burning sources were both significant.The diurnalvariations of O3showed single peak.NO,benzene and methylbenzene reached their peak in the morning.NO2,PM10and PM2.5all showed bimodal distribution.Besides,CO exhibited a bimodal distribution as well.The concentration of atmosphericpollutants in urban Chengdu did not show"weekend effect"but showed"Holiday Effect".
作者
罗进奇
黄小娟
张军科
张建强
宋宏艺
伍潘
LUO Jin-qi;HUANG Xiao-juan;ZHANG Jun-ke;ZHANG Jian-qiang;SONG Hong-yi;WU Pan(Faculty of Geosciences & Environmental Engineering,Southwest Jiaotong University,Chengdu 611756,China;Plateau Atmosphere & Environment Key Laboratory of Sichuan Province,College of AtmosphericSciences,Chengdu University of Information Technology,Chengdu 610225,China)
出处
《四川环境》
2018年第6期21-26,共6页
Sichuan Environment
基金
中央高校基本科研业务费专项资金资助(2682017CX080)
关键词
大气污染物
季节变化
不同类型天
成都
Atmospheric pollutants
seasonal variation
different types of days
Chengdu
