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Aerosol size distribution and new particle formation events in the suburb of Xi'an, northwest China
Peng, Yan1,2,3; Liu, Xiaodong1,2,4; Dai, Jin3; Wang, Zhao5; Dong, Zipeng3; Dong, Yan3; Chen, Chuang3; Li, Xingmin3; Zhao, Na6; Fan, Chao6
2017-03-01
发表期刊ATMOSPHERIC ENVIRONMENT
卷号153期号:2017页码:194-205
文章类型Article
摘要Particle number concentration and size distribution are important for better understanding the characteristics of aerosols. However, their measurements are scarce in western China. Based on the first measurement of particle number size distribution (10-487 nm) in the suburb of Xi'an, northwest China from November 2013 to December 2014, the seasonal, monthly and diurnal average particle number concentrations were investigated, and the characteristics of new particle formation (NPF) events and their dependencies on meteorological parameters also discussed. The results showed that the annual average particle number concentrations in the nucleation (N-Nuc), Aitken (N-AIT), and Accumulation (N-Acc) size ranges were 960 cm 3, 4457 cm 3, 3548 cm 3, respectively. The mean total particle number concentration (N-TOT) was 8965 cm(-3) and largely dominated by particles in Aitken mode. The number concentration was dominated by particles around 67.3 nm in spring, summer and fall, while about 89.8 nm in winter. The percentage of the ultrafine size range (UFP, particles of diameter below 100 nm) to total particle number concentration was 63.2%, 69.6%, 62.2% and 58.1% in four seasons. The diurnal variation of the nucleation mode particles was mainly influenced by NPF events in summer, while by both traffic densities and NPF events in spring, fall and winter. The diurnal variation of the number concentration of Aitken mode particles correlated with the traffic emission in spring, fall and winter, while in summer it more correlated with contribution of the growth of the nucleation mode particles. The burst of nucleation mode particles typically started in the daytime (08:15-16:05, LST). The growth rates of nucleated particles ranged from 2.8 to 10.7 nm ha with an average of 5.0 +/- 1.9 nm h(-1)Among observed 66 NPF events from 347 effective measurement days, 85 percent of their air masses came from north or northwest China, resulting in a low concentration of pre-existing particles, and only 15 percent came southerly from Qingling Mountains. Based on their growth rate, 64 and 36 percent of their subsequent particles, corresponding to types 1 and 2 NPF events, grew and seldom grew after the burst of nucleation mode particles. For type 1 NPF event, the nucleated particles could grow up to 40 nm or larger when surface winds shifted from westerly to easterly or southeasterly (from village areas). For type 2 NPF events, the particles kept almost unchanged when the winds stayed westerly. This implied that the surface wind direction with different emissions might play an important role in new particle growth in suburb of Xi'an. (C) 2017 Elsevier Ltd. All rights reserved.
关键词Atmospheric Aerosol Size Distribution New Particle Formation Meteorological Parameters
WOS标题词Science & Technology ; Life Sciences & Biomedicine ; Physical Sciences
DOI10.1016/j.atmosenv.2017.01.022
关键词[WOS]YANGTZE-RIVER DELTA ; PARTICULATE AIR-POLLUTION ; LONG-TERM MEASUREMENTS ; SULFURIC-ACID ; STATISTICAL-ANALYSIS ; ATMOSPHERIC AEROSOL ; AMBIENT AEROSOL ; SORPES STATION ; HONG-KONG ; URBAN
收录类别SCI
语种英语
WOS研究方向Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS类目Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS记录号WOS:000395354400018
引用统计
文献类型期刊论文
条目标识符http://ir.ieecas.cn/handle/361006/5518
专题古环境研究室
作者单位1.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Meteorol Inst Shaanxi Prov, Xian 710016, Peoples R China
4.Xi An Jiao Tong Univ, Sch Human Settlements & Civil Engn, Xian 710049, Peoples R China
5.Shaanxi Remote Sensing Informat Ctr Agr, Xian 710049, Peoples R China
6.Xian Meteorol Bur, Xian 710100, Peoples R China
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Peng, Yan,Liu, Xiaodong,Dai, Jin,et al. Aerosol size distribution and new particle formation events in the suburb of Xi'an, northwest China[J]. ATMOSPHERIC ENVIRONMENT,2017,153(2017):194-205.
APA Peng, Yan.,Liu, Xiaodong.,Dai, Jin.,Wang, Zhao.,Dong, Zipeng.,...&Fan, Chao.(2017).Aerosol size distribution and new particle formation events in the suburb of Xi'an, northwest China.ATMOSPHERIC ENVIRONMENT,153(2017),194-205.
MLA Peng, Yan,et al."Aerosol size distribution and new particle formation events in the suburb of Xi'an, northwest China".ATMOSPHERIC ENVIRONMENT 153.2017(2017):194-205.
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