Seasonal and diurnal variations of atmospheric peroxyacetyl nitrate, peroxypropionyl nitrate, and carbon tetrachloride in Beijing

查看全文 作　　者：Gen [1]Zhang;Yujing [1]Mu;Junfeng [1]Liu;Chenglong [1]Zhang;Yuanyuan [1]Zhang;Yujie [1]Zhang;Hongxing [1]Zhang

机构地区：[1]Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences

出　　处：《Journal of Environmental Sciences》索引2014年第26卷第1期,共10页

基　　金：supported by the National Natural Science Foundation of China(No.41075094,21177140,20977097);the Strategic Priority Research Program of the Chinese Academy of Sciences(No.XDB05010100);the National Basic Research Program(973)of China(No.2010CB732304) 摘　　要：Atmospheric peroxyacetyl nitrate(PAN), peroxypropionyl nitrate(PPN), and carbon tetrachloride(CCl4) were measured from September 2010 to August 2011 in Beijing. PAN exhibited low values from mid-autumn to early spring(October to March) with monthly average concentrations ranging from 0.28 to 0.73 ppbV, and increased from early spring to summer(March to August), ranging from 1.37–3.79 ppbV. The monthly variation of PPN was similar to PAN, with low values(below detection limit to 0.18 ppbV) from mid-autumn to early spring, and a monthly maximum in September(1.14 ppbV). The monthly variation of CCl4was tightly related to the variation of temperature, exhibiting a minimum in winter(69.3 pptV) and a maximum of 180.6 pptV in summer. Due to weak solar intensity and short duration, PAN and O3showed no distinct diurnal patterns from morning to night during winter, whereas for other seasons, they both exhibited maximal values in the late afternoon(ca. 15:00 to 16:00 local time) and minimal values during early morning and midnight. Good linear correlations between PAN and PPN were found in autumn(R = 0.91), spring(R = 0.94), and summer(R = 0.81), with slopes of 0.130, 0.222, and 0.133, respectively, suggesting that anthropogenic hydrocarbons dominated the photochemical formation of PANs in Beijing. Positive correlation between PAN and O3 in summer with the low slopes( O3 / PAN) ranging from 9.92 to 18.0 indicated serious air pollution in Beijing, and strong negative correlation in winter reflected strong O3consumption by NO titration and less thermal decompositin of PAN. 关键词：四氯化碳硝酸盐北京乙酰过氧大气季节日变化

相关文献

参考文献（62）
引证文献（17）
耦合文献（38）

参考文献(62)

引证文献(17)

耦合文献(38)

互联网出版许可证新出网证(渝)字10号全国400电话 - 免长途话费

Seasonal and diurnal variations of atmospheric peroxyacetyl nitrate, peroxypropionyl nitrate, and carbon tetrachloride in Beijing

参考文献(62)

引证文献(17)

耦合文献(38)

用户提示