DOI: 10.1016/j.atmosenv.2015.04.033
Scopus记录号: 2-s2.0-84927714434
论文题名: Variations in PM2.5, TSP, BC, and trace gases (NO2, SO2, and O3) between haze and non-haze episodes in winter over Xi'an, China
作者: Zhang Q ; , Shen Z ; , Cao J ; , Zhang R ; , Zhang L ; , Huang R ; -J ; , Zheng C ; , Wang L ; , Liu S ; , Xu H ; , Zheng C ; , Liu P
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2015
卷: 112 起始页码: 64
结束页码: 71
语种: 英语
英文关键词: Aerosol formation
; Inorganic aerosol
; Organic aerosol
; Secondary aerosol
; Urban environment
Scopus关键词: Aerosols
; Carbon
; Chemical analysis
; Chlorine
; Fluorine
; Gases
; Ions
; Magnesium
; Aerosol formation
; Inorganic aerosol
; Organic aerosol
; Secondary aerosols
; Urban environments
; Organic carbon
; ammonia
; black carbon
; calcium ion
; carbon
; chloride
; fluoride
; magnesium ion
; nitrate
; nitric oxide
; organic carbon
; ozone
; potassium ion
; sodium ion
; sulfate
; sulfur dioxide
; water
; aqueous solution
; concentration (composition)
; diurnal variation
; haze
; particulate matter
; precipitation quality
; relative humidity
; trace gas
; traffic emission
; aerosol
; air pollutant
; Article
; China
; circadian rhythm
; concentration (parameters)
; haze
; humidity
; meteorology
; molecular weight
; priority journal
; solubility
; temperature
; visibility
; wind
; winter
; China
; China
; Shaanxi
; Xian
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: To investigate chemical profiles and formation mechanisms of aerosol particles in winter haze events, daily PM2.5 and TSP, 5-min BC, and 15-min trace gases (SO2, NO2, and O3) were measured continuously during Dec. 1-31, 2012 in Xi'an. Chemical analysis was also conducted for nine water-soluble inorganic ions (Na+, NH4 +, K+, Mg2+, Ca2+, F-, Cl-, NO3 -, and SO4 2-), organic carbon (OC), elemental carbon (EC), and eight carbon fractions (OC1, OC2, OC3, OC4, EC1, EC2, EC3, and OP) in both PM2.5 and TSP samples. Higher levels of TSP, PM2.5, BC, SO2, and NO2, and lower levels of O3 were observed during haze periods in comparison with non-haze days. The sum of the major secondary ionic species (NH4 +, NO3 -, and SO4 2-) in PM2.5 or TSP during haze periods was about 3 times of that during non-haze days. Ion balance calculations showed that PM2.5 samples were acidic during haze periods and were close to neutral during non-haze days. The mean carbon levels were 52.9μgm-3 and 82.1μgm-3 in PM2.5 and TSP, respectively, during haze events, which were ~1.5 times of those during non-haze days. The diurnal variations of BC during non-haze days showed a bimodal distribution with two peaks coincided with traffic rush hours. This was not the case during haze periods, which exhibited a relatively smooth pattern but with high concentration levels, providing evidence of particle accumulation. The ratios of SO4 2-/EC, NO3 -/EC, and NH4 +/EC sharply increased during haze periods, indicating the important pathway of secondary inorganic species formation through aqueous-phase transformation under high relative humidity condition. This study also highlights that wintertime secondary organic carbon (SOC) formation can be an important contributor to carbonaceous aerosol, especially during haze periods. © 2015 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/81751
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Environmental Science and Engineering, Xi'an Jiaotong University, Xi'an, China; Key Lab of Aerosol Chemistry and Physics, Institute of Earth Environment, Chinese Academy of Sciences, China; Key Laboratory of Regional Climate-Environment Research for Temperate East Asia, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; Air Quality Research Division, Science and Technology Branch, Environment Canada, Toronto, Canada; Laboratory of Atmospheric Chemistry, Paul Scherrer Institute (PSI), Villigen, Switzerland; Centre for Climate and Air Pollution Studies, Ryan Institute, National University of Ireland Galway, University Road, Galway, Ireland
Recommended Citation:
Zhang Q,, Shen Z,, Cao J,et al. Variations in PM2.5, TSP, BC, and trace gases (NO2, SO2, and O3) between haze and non-haze episodes in winter over Xi'an, China[J]. Atmospheric Environment,2015-01-01,112