Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-17-6797-2017 |
Simultaneous measurements of particle number size distributions at ground level and 260m on a meteorological tower in urban Beijing, China | |
Du, Wei1,2; Zhao, Jian1,2; Wang, Yuying3; Zhang, Yingjie1,4; Wang, Qingqing1; Xu, Weiqi1,2; Chen, Chen1; Han, Tingting1,2; Zhang, Fang3; Li, Zhanqing3; Fu, Pingqing1,5; Li, Jie1; Wang, Zifa1,5; Sun, Yele1,2,5 | |
2017-06-09 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS
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ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2017 |
卷号 | 17期号:11 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
英文摘要 | Despite extensive studies into the characterization of particle number size distributions at ground level, realtime measurements above the urban canopy in the megacity of Beijing have never been performed to date. Here we conducted the first simultaneous measurements of size-resolved particle number concentrations at ground level and 260m in urban Beijing from 22 August to 30 September. Our results showed overall similar temporal variations in number size distributions between ground level and 260 m, yet periods with significant differences were also observed. Particularly, accumulation-mode particles were highly correlated (r(2) = 0.85) at the two heights, while Aitken-mode particles presented more differences. Detailed analysis suggests that the vertical differences in number concentrations strongly depended on particle size, and particles with a mobility diameter between 100 and 200 nm generally showed higher concentrations at higher altitudes. Particle growth rates and condensation sinks were also calculated, which were 3.2 and 3.6 nm h(-1), and 2.8 x 10(-2) and 2.9 x10(-2) s(-1), at ground level and 260 m, respectively. By linking particle growth with aerosol composition, we found that organics appeared to play an important role in the early stage of the growth (09:00-12: 00 LT) while sulfate was also important during the later period. Positive matrix factorization of size-resolved number concentrations identified three common sources at ground level and 260 m, including a factor associated with new particle formation and growth events (NPEs), and two secondary factors that represent photochemical processing and regional transport. Cooking emission was found to have a large contribution to small particles and showed much higher concentration at ground level than 260m in the evening. These results imply that investigation of NPEs at ground level in megacities needs to consider the influences of local cooking emissions. The impacts of regional emission controls on particle number concentrations were also illustrated. Our results showed that regional emission controls have a dominant impact on accumulation-mode particles by decreasing gas precursors and particulate matter loadings, and hence suppressing particle growth. In contrast, the influences on Aitken particles were much smaller due to the enhanced new particle formation (NPF) events. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000403213700003 |
WOS关键词 | POSITIVE MATRIX FACTORIZATION ; LONG-TERM ; DAY PARADE ; SOURCE APPORTIONMENT ; AEROSOL COMPOSITION ; SUBMICRON AEROSOLS ; EMISSION CONTROL ; POLLUTION ; INSIGHTS ; GROWTH |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/16167 |
专题 | 地球科学 |
作者单位 | 1.Chinese Acad Sci, Inst Atmospher Phys, State Key Lab Atmospher Boundary Layer Phys & Atm, Beijing 100029, Peoples R China; 2.Univ Chinese Acad Sci, Coll Earth Sci, Beijing 100049, Peoples R China; 3.Beijing Normal Univ, Coll Global Change & Earth Syst Sci, Beijing 100875, Peoples R China; 4.Nanjing Univ Informat Sci & Technol, Sch Atmospher Phys, Nanjing 210044, Jiangsu, Peoples R China; 5.Chinese Acad Sci, Inst Urban Environm, Ctr Excellence Reg Atmospher Environm, Xiamen 361021, Peoples R China |
推荐引用方式 GB/T 7714 | Du, Wei,Zhao, Jian,Wang, Yuying,et al. Simultaneous measurements of particle number size distributions at ground level and 260m on a meteorological tower in urban Beijing, China[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2017,17(11). |
APA | Du, Wei.,Zhao, Jian.,Wang, Yuying.,Zhang, Yingjie.,Wang, Qingqing.,...&Sun, Yele.(2017).Simultaneous measurements of particle number size distributions at ground level and 260m on a meteorological tower in urban Beijing, China.ATMOSPHERIC CHEMISTRY AND PHYSICS,17(11). |
MLA | Du, Wei,et al."Simultaneous measurements of particle number size distributions at ground level and 260m on a meteorological tower in urban Beijing, China".ATMOSPHERIC CHEMISTRY AND PHYSICS 17.11(2017). |
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