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Impact of relative humidity and water soluble constituents of PM2.5 on visibility impairment in Beijing, China

Chen, Jing; Qiu, Shasha; Shang, Jing; Wilfrid, Ossima M.F.; Liu, Xingang; Tian, Hezhong and Boman, Johan (2014) In Aerosol and Air Quality Research 14(1). p.260-268
Abstract
Beijing has been experiencing severe particulate pollution accompanying the fast growing population and economy. This study investigated the impact of PM2.5 and its water soluble organic and inorganic constituents on visual impairment in Beijing under different meteorological conditions. According to the analysis of PM2.5 samples collected in Spring 2012, water soluble species took up 38.1% of PM2.5 mass, among which NO3– was the most abundant constituent, followed by SO42–, NH4+ and water soluble organic matter. The correlation analysis between visibility and aerosol loadings as well as meteorological parameters revealed the dominant impact of meteorological conditions, relative humidity in particular, on visibility impairment over the... (More)
Beijing has been experiencing severe particulate pollution accompanying the fast growing population and economy. This study investigated the impact of PM2.5 and its water soluble organic and inorganic constituents on visual impairment in Beijing under different meteorological conditions. According to the analysis of PM2.5 samples collected in Spring 2012, water soluble species took up 38.1% of PM2.5 mass, among which NO3– was the most abundant constituent, followed by SO42–, NH4+ and water soluble organic matter. The correlation analysis between visibility and aerosol loadings as well as meteorological parameters revealed the dominant impact of meteorological conditions, relative humidity in particular, on visibility impairment over the mass concentration of PM2.5. Compared to the total aerosol loading of PM2.5, visibility was better correlated with the total mass of water soluble constituents (WSC). The visual range in Beijing was the most sensitive to both WSC and PM2.5 in the RH range of 30–70%. Severe visual impairment was observed for RH ? 70% with the least sensitivity to WSC and PM2.5. The effects of synoptic scale circulation on meteorological variables that affect air quality were also examined with the movement of a cold front as a case study. The findings have direct implications to region-wide policy-making and control strategies. (Less)
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author
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Visibility impairment, Water soluble ion, Water soluble organic carbon, Hygroscopic growth, Synoptic circulation
in
Aerosol and Air Quality Research
volume
14
issue
1
pages
260 - 268
publisher
Taiwan Association for Aerosol Research
external identifiers
  • scopus:84893130282
ISSN
2071-1409
DOI
10.4209/aaqr.2012.12.0360
project
MERGE
language
English
LU publication?
no
id
eaecba4e-0153-421c-857b-20eb8931e5dd (old id 7515731)
date added to LUP
2015-07-08 14:41:03
date last changed
2017-11-05 04:44:05
@article{eaecba4e-0153-421c-857b-20eb8931e5dd,
  abstract     = {Beijing has been experiencing severe particulate pollution accompanying the fast growing population and economy. This study investigated the impact of PM2.5 and its water soluble organic and inorganic constituents on visual impairment in Beijing under different meteorological conditions. According to the analysis of PM2.5 samples collected in Spring 2012, water soluble species took up 38.1% of PM2.5 mass, among which NO3– was the most abundant constituent, followed by SO42–, NH4+ and water soluble organic matter. The correlation analysis between visibility and aerosol loadings as well as meteorological parameters revealed the dominant impact of meteorological conditions, relative humidity in particular, on visibility impairment over the mass concentration of PM2.5. Compared to the total aerosol loading of PM2.5, visibility was better correlated with the total mass of water soluble constituents (WSC). The visual range in Beijing was the most sensitive to both WSC and PM2.5 in the RH range of 30–70%. Severe visual impairment was observed for RH ? 70% with the least sensitivity to WSC and PM2.5. The effects of synoptic scale circulation on meteorological variables that affect air quality were also examined with the movement of a cold front as a case study. The findings have direct implications to region-wide policy-making and control strategies.},
  author       = {Chen, Jing and Qiu, Shasha and Shang, Jing and Wilfrid, Ossima M.F. and Liu, Xingang and Tian, Hezhong and Boman, Johan},
  issn         = {2071-1409},
  keyword      = {Visibility impairment,Water soluble ion,Water soluble organic carbon,Hygroscopic growth,Synoptic circulation},
  language     = {eng},
  number       = {1},
  pages        = {260--268},
  publisher    = {Taiwan Association for Aerosol Research},
  series       = {Aerosol and Air Quality Research},
  title        = {Impact of relative humidity and water soluble constituents of PM2.5 on visibility impairment in Beijing, China},
  url          = {http://dx.doi.org/10.4209/aaqr.2012.12.0360},
  volume       = {14},
  year         = {2014},
}