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Variations of Particle Size Distribution, Black Carbon, and Brown Carbon duringa Severe Winter Pollution Event over Xi’an, China
Zhang,Q(Zhang,Qian)1,2; Shen,ZX(Shen,Zhenxing)1,2; Lei,YL(Lei,Yali)1; Wang,YS(Wang,Yueshe)4; Zeng,YL(Zeng,Yaling)1; Wang, QY(Wang,Qiyuan)2; Ning,Z(Ning,Zhi)3; Cao,JJ(Cao,Junji)1; Wang,LQ(Wang,Linqing)1; Xu,HM(Xu,Hongmei)1; Shen,Zhenxing
2018-09-28
发表期刊Aerosol and Air Quality Research
卷号18期号:6页码:1419-1430
文章类型期刊论文
其他摘要Real-time particulate matter (PM) size distributions, 4-hour time resolution, PM2.5, carbonaceous materials, and their optical properties were measured during a severe pollution event in Xi’an, China. High PM2.5/PM10 ratios were observed on both pollution (0.83) and non-pollution (0.73) days, emphasizing the abundance of fine particles during sampling days. The particle number (PN) first peaked with a wide size range (30–100 nm) before morning rush hours (approximately 01:00–05:00) on pollution and non-pollution days, demonstrating that PN was governed by the accumulation of freshly emitted diesel particles and characterized by distinct aerosol condensation growth. By contrast, the second peak time and size range differed between pollution and non-pollution days because of different formation mechanisms. The light-absorbing coefficients of both black carbon (BC, babs-880nm, BC) and brown carbon (BrC, babs-370nm, BrC) were high on pollution days and decreased to approximately half of those values on non-pollution days, indicating that the degree of light absorption is reduced by rain. The diurnal variation in babs-880nm, BC pollution peaked with traffic on January 1 and 2. By contrast, it remained in relatively stable and high ranges (120–160 Mm–1) in the second period (January 3–5) without traffic peaks, illustrating that the dominant sources changed even during the same pollution period. High values of both babs-370nm, BrC and babs-880nm, BC coincided in the afternoon and evening due to emissions from primary sources, and abundant aqueous secondary organic carbon, respectively. A highly variable mass absorption coefficient of BrC also indicated the variety of fuel combustion sources of primary BrC in Xi’an.
关键词Severe Pollution Periods Particle Size Distribution Black Carbon Brown Carbon
DOI10.4209/aaqr.2018.01.0007
收录类别SCI
所属项目编号41573101 ; 2017YFC0212205 ; SKLLQG1616 ; xkjc2015002
语种英语
项目资助者National NaturalScience Foundation of China ; National NaturalScience Foundation of China ; NationalKey Research and Development Plan of China ; NationalKey Research and Development Plan of China ; a grant from the SKLLQG at theChinese Academy of Sciences ; a grant from the SKLLQG at theChinese Academy of Sciences ; Fundamental Research Funding for Central Universities inChina ; Fundamental Research Funding for Central Universities inChina
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文献类型期刊论文
条目标识符http://ir.ieecas.cn/handle/361006/5370
专题粉尘与环境研究室
通讯作者Shen,Zhenxing
作者单位1.Department of Environmental Science and Engineering, Xi’an Jiaotong University, Xi’an 710049, China
2.Key Lab of Aerosol Chemistry & Physics, SKLLQG, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an710061, China
3.School of Energy and Environment, City University of Hong Kong, Hong Kong, China
4.State Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xi’an 710049, China
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Zhang,Q(Zhang,Qian),Shen,ZX(Shen,Zhenxing),Lei,YL(Lei,Yali),等. Variations of Particle Size Distribution, Black Carbon, and Brown Carbon duringa Severe Winter Pollution Event over Xi’an, China[J]. Aerosol and Air Quality Research,2018,18(6):1419-1430.
APA Zhang,Q.,Shen,ZX.,Lei,YL.,Wang,YS.,Zeng,YL.,...&Shen,Zhenxing.(2018).Variations of Particle Size Distribution, Black Carbon, and Brown Carbon duringa Severe Winter Pollution Event over Xi’an, China.Aerosol and Air Quality Research,18(6),1419-1430.
MLA Zhang,Q,et al."Variations of Particle Size Distribution, Black Carbon, and Brown Carbon duringa Severe Winter Pollution Event over Xi’an, China".Aerosol and Air Quality Research 18.6(2018):1419-1430.
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