摘要
以"奎屯—独山子—乌苏"区域重点城市奎屯为研究区域,利用2013—2015年O_3、VOC_s、NO_x监测数据,探讨奎屯市大气O_3与VOC_s、NO_x之间的关系。结果显示:2013—2015年依次出现33 d、14 d、10 d O_3超标现象,最大日均值分别为0. 457 mg·m^(-3)、0. 396 mg·m^(-3)、0. 385 mg·m^(-3),夏季O_3污染较重,冬季和夏季O_3浓度值相差近2. 5倍; O_3浓度日间变化呈现倒"U"形分布,峰值出现在17:00左右;冬季和夏季VOC_s浓度相差近3倍,VOC_s小时值没有较明显的日变化规律,冬季VOC_s浓度最高而O_3浓度最低,两者反向作用不明显,但NO_x浓度与O_3呈现对称的反向作用,说明冬季奎屯市O_3的生成处于NO_x敏感区而非VOC_s敏感区;夏季VOC_s与NO_x变化趋势基本相同,O_3浓度水平处于高位,两者呈现对称的反向作用,说明夏季奎屯市O_3的生成同时处于VOC_s和NO_x敏感区,O_3生成受VOC_s及NO_x的交替控制。
In this paper,the relationships among O3,VOCs and NOx concentrations over Kuytun City,Xinjiang,northwest China during the period of 2013-2015 were analyzed using the environmental monitoring data.Results showed that an apparent overload of O3 concentration occurred over Kuytun City.O3 concentration over the city was overloaded for 33,14 and 10 days during the period of 2013-2015,and the daily maximum concentrations of O3 were 0.457,0.396 and 0.385 mg·m-3,respectively.The heavy pollution of O3 occurred in summer,and the value of O3 concentration was 2.5 times higher than that in winter.The curve of diurnal variation of O3 pollution was reversely'U-shaped',and the peak value occurred around 17:00 o’clock.The concentration of VOCs in summer was 3 times higher than that in winter,and there was no significant diurnal variation.It was observed that the high concentration of VOCs and low concentration of O3 occurred in winter.In summer,VOCs concentration changed with NOx accordingly,and O3 concentration was the highest.This study indicated that the O3 pollution occurred mainly in the sensitive areas of VOCs and NOx,and controlled alternatively by VOCsand NOx.
作者
郭宇宏
朱俏俏
杨春
王海林
张小啸
刘文江
杨荣江
田青
GUO Yu-hong;ZHU Qiao-qiao;YANG Chun;WANG Hai-lin;ZHANG Xiao-xiao;LIU Wen-jiang;YANG Rong-jiang;TIAN Qing(Master Station for Environmental Monitoring of Xinjiang Uygur Autonomous Region,Urumqi 830011,Xinjiang,China;Zhejiang Province Center of Economic Information,Hangzhou 310006,Zhejiang,China;Postdoctoral Research Station of Environmental Science and Engineering,Zhejiang University,Hangzhou 310027,Zhejiang,China;National Key Laboratory of Desert and Oasis Ecology,Xinjiang Institute of Ecology and Geography,Chinese Academy of Sciences,Urumqi 830011,Xinjiang,China;Kuytun Station of Environment Protection and Monitoring,Kuytun 833200,Xinjiang,China)
出处
《干旱区研究》
CSCD
北大核心
2019年第3期734-742,共9页
Arid Zone Research
基金
新疆自然科学基金项目(2013211A045)资助
