CAS OpenIR  > 中科院上海应用物理研究所2011-2018年
Characteristics of Haze Pollution Episodes and Analysis of a Typical Winter Haze Process in Shanghai
Zhao, MF; Xiu, GL; Qiao, T; Li, YL; Yu, JZ; Xiu, GL (reprint author), E China Univ Sci & Technol, State Environm Protect Key Lab Risk Assessment &, Shanghai 200237, Peoples R China.; Xiu, GL (reprint author), ACC AQSM, Brisbane, Qld, Australia.
2016
Source PublicationAEROSOL AND AIR QUALITY RESEARCH
ISSN1680-8584
Volume16Issue:7Pages:1625-1637
Subtype期刊论文
AbstractOne-year field campaign was conducted from July 2013 to August 2014 at the site of East China University of Science and Technology (ECUST) in urban Shanghai, and mass concentrations and chemical compositions of PM2.5 were measured. Gaseous pollutants (SO2, NO2) and meteorological parameters (wind speed, wind direction, pressure, temperature and relative humidity) were simultaneously obtained. In this study, PM2.5 mass balances on haze and non-haze days were reconstructed and the sum of secondary inorganic aerosols (SIA) and organic matter (OM) accounted for over 80%. The fraction of nitrate in SIA was much higher on haze days than that on non-haze days, while the corresponding fraction of ammonium was lower, implying that the variations of the sources and formation processes of SIA on haze days. In theory, sulfate and nitrate might be almost fully neutralized by ammonium. Moreover, the sulfur oxidation ratio (SOR) values were much higher than the nitrogen oxidation ratio (NOR) values, indicating the greater oxidation capacity of SO2 would occur. On haze days, the high NOR values could be explained by the relatively low temperature, the high NO2 concentration and the potential dominant gas-phase reaction. As for secondary organic aerosol (SOA), the formation processes were usually associated with nitrate formation. In winter, haze pollution episodes occurred more frequently than those in other seasons, associated with the different features of wind speed, wind direction and 72-h backward trajectory. In addition, one case from 17 November 2013 to 4 January 2014 was selected to investigate the formation mechanism of haze pollution episodes. The key factors that affected the haze formation might be the local stable synoptic conditions including weak surface wind, surface temperature inversion and high relative humidity, the long-range transportations from the Northwest and the large amounts of emissions from local sources.
KeywordHaze Pollution Episode Pm2.5 Secondary Inorganic Aerosols (Sia) Secondary Organic Aerosols (Soa) Meteorological Conditions
DOI10.4209/aaqr.2016.01.0049
Indexed BySCI
Language英语
WOS IDWOS:000378942400010
Citation statistics
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/26445
Collection中科院上海应用物理研究所2011-2018年
Corresponding AuthorXiu, GL (reprint author), E China Univ Sci & Technol, State Environm Protect Key Lab Risk Assessment &, Shanghai 200237, Peoples R China.; Xiu, GL (reprint author), ACC AQSM, Brisbane, Qld, Australia.
Recommended Citation
GB/T 7714
Zhao, MF,Xiu, GL,Qiao, T,et al. Characteristics of Haze Pollution Episodes and Analysis of a Typical Winter Haze Process in Shanghai[J]. AEROSOL AND AIR QUALITY RESEARCH,2016,16(7):1625-1637.
APA Zhao, MF.,Xiu, GL.,Qiao, T.,Li, YL.,Yu, JZ.,...&Xiu, GL .(2016).Characteristics of Haze Pollution Episodes and Analysis of a Typical Winter Haze Process in Shanghai.AEROSOL AND AIR QUALITY RESEARCH,16(7),1625-1637.
MLA Zhao, MF,et al."Characteristics of Haze Pollution Episodes and Analysis of a Typical Winter Haze Process in Shanghai".AEROSOL AND AIR QUALITY RESEARCH 16.7(2016):1625-1637.
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