Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1016/j.atmosres.2017.11.016 |
Particle size distribution, chemical composition and meteorological factor analysis: A case study during wintertime snow cover in Zhengzhou, China | |
Yu, Fei1; Wang, Qun1; Yan, Qishe1; Jiang, Nan1; Wei, Junhua1; Wei, Zhiyuan2; Yin, Shasha1 | |
2018-04-01 | |
发表期刊 | ATMOSPHERIC RESEARCH |
ISSN | 0169-8095 |
EISSN | 1873-2895 |
出版年 | 2018 |
卷号 | 202页码:140-147 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; USA |
英文摘要 | There was a significant snowfall event in North China from November 23 to 25 in 2015. Considering that most of the bare surface and road dust were covered by snow, the effect of dust and soil could be ignored. Atmospheric particle samples were collected in Zhengzhou, China during a haze event from November 28 to December 4, 2015. To better understand the formation and evolution of this hazy event, the size distribution, particle number, composition of particles and meteorological parameters were measured and analyzed. Results show that the meteorological conditions played an important role in the occurrence and elimination of this event. The hourly fine particle matter (PM2.5) concentration was positively correlated with relative humidity (r = 0.84, p < 0.01) but negatively correlated with wind speed (r = - 0.62, p < 0.01). The particle mass concentrations peaked at the sizes of 1.0 to 1.6 mu m on hazy days, however, the total particle number concentrations on hazy days were lower than those on clean days. The median diameter of the number concentration during hazy days was approximately 60 nm, whereas it was 26 nm on clean days. Two new particle formation processes were observed on the clean days both. The proportion of secondary inorganic ions (SO42-, NO3- and NH4+) on hazy days was higher than that on clean days. The higher NH4+ concentration in this case may be contributed by traffic and coal-power emission. Crustal matter accounted for 2.4% in PM2.5 on hazy days, and it confirmed that the contribution of dust emission source was negligible during this event. The ratios of NO3-/SO42- ranging from 0.41 to 0.67 indicated the relative importance of stationary combustion. The ratios of OC/EC varied from 2.73 to 3.42 and indicated the presence of secondary organic carbon. Effective haze mitigation should enforce pollutant control measures for primary emission (dust) and secondary aerosol gaseous precursor (NH3, NO2 and SO2). |
英文关键词 | Hazy Secondary aerosol Snow cover Size distribution Chemical composition |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000426226500014 |
WOS关键词 | SEVERE HAZE EPISODES ; ATMOSPHERIC PARTICLES ; ULTRAFINE PARTICLES ; PARTICULATE NITRATE ; SULFATE FORMATION ; FOG EPISODES ; JANUARY 2013 ; RIVER DELTA ; PM2.5 ; AEROSOL |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | 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/38628 |
专题 | 地球科学 |
作者单位 | 1.Zhengzhou Univ, Coll Chem & Mol Engn, Res Inst Environm Sci, Zhengzhou 450001, Henan, Peoples R China; 2.Damien High Sch, 2280 Damien Ave, La Verne, CA 91750 USA |
推荐引用方式 GB/T 7714 | Yu, Fei,Wang, Qun,Yan, Qishe,et al. Particle size distribution, chemical composition and meteorological factor analysis: A case study during wintertime snow cover in Zhengzhou, China[J]. ATMOSPHERIC RESEARCH,2018,202:140-147. |
APA | Yu, Fei.,Wang, Qun.,Yan, Qishe.,Jiang, Nan.,Wei, Junhua.,...&Yin, Shasha.(2018).Particle size distribution, chemical composition and meteorological factor analysis: A case study during wintertime snow cover in Zhengzhou, China.ATMOSPHERIC RESEARCH,202,140-147. |
MLA | Yu, Fei,et al."Particle size distribution, chemical composition and meteorological factor analysis: A case study during wintertime snow cover in Zhengzhou, China".ATMOSPHERIC RESEARCH 202(2018):140-147. |
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