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Variations of Particle Size Distribution, Black Carbon, and Brown Carbon during a Severe Winter Pollution Event over Xi'an, China
Zhang, Qian1,2,3; Shen, Zhenxing1,2; Lei, Yali1; Wang, Yueshe4; Zeng, Yaling1; Wang, Qiyuan2; Ning, Zhi3; Cao, Junji1; Wang, Linqing1; Xu, Hongmei1
2018-06-01
Source PublicationAEROSOL AND AIR QUALITY RESEARCH
Volume18Issue:6Pages:1419-1430
SubtypeArticle
AbstractReal-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, b(abs-880nm,BC)) and brown carbon (BrC, b(abs-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 b(abs-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 b(abs-370nm, BrC) and b(abs-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.
KeywordSevere Pollution Periods Particle Size Distribution Black Carbon Brown Carbon
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
DOI10.4209/aaqr.2018.01.0007
WOS KeywordSECONDARY ORGANIC AEROSOL ; REAL-TIME CHARACTERIZATION ; YANGTZE-RIVER DELTA ; AIR-POLLUTION ; PARTICULATE MATTER ; OPTICAL-PROPERTIES ; NORTHWEST CHINA ; ELEMENTAL CARBON ; LIGHT-ABSORPTION ; HAZE POLLUTION
Indexed BySCI
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
WOS IDWOS:000434011800006
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Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/5126
Collection粉尘与环境研究室
Affiliation1.Xi An Jiao Tong Univ, Dept Environm Sci & Engn, Xian 710049, Shaanxi, Peoples R China
2.Chinese Acad Sci, Inst Earth Environm, SKLLQG, Key Lab Aerosol Chem & Phys, Xian 710061, Shaanxi, Peoples R China
3.City Univ Hong Kong, Sch Energy & Environm, Hong Kong, Hong Kong, Peoples R China
4.Xi An Jiao Tong Univ, State Key Lab Multiphase Flow Power Engn, Xian 710049, Shaanxi, Peoples R China
Recommended Citation
GB/T 7714
Zhang, Qian,Shen, Zhenxing,Lei, Yali,et al. Variations of Particle Size Distribution, Black Carbon, and Brown Carbon during a Severe Winter Pollution Event over Xi'an, China[J]. AEROSOL AND AIR QUALITY RESEARCH,2018,18(6):1419-1430.
APA Zhang, Qian.,Shen, Zhenxing.,Lei, Yali.,Wang, Yueshe.,Zeng, Yaling.,...&Xu, Hongmei.(2018).Variations of Particle Size Distribution, Black Carbon, and Brown Carbon during a Severe Winter Pollution Event over Xi'an, China.AEROSOL AND AIR QUALITY RESEARCH,18(6),1419-1430.
MLA Zhang, Qian,et al."Variations of Particle Size Distribution, Black Carbon, and Brown Carbon during a Severe Winter Pollution Event over Xi'an, China".AEROSOL AND AIR QUALITY RESEARCH 18.6(2018):1419-1430.
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