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Spatiotemporal variations of air pollutants in western China and their relationship to meteorological factors and emission sources
- Source :
- Environmental pollution (Barking, Essex : 1987). 254
- Publication Year :
- 2019
-
Abstract
- We have carried out a comprehensive analysis of six air pollutants (particles with an aerodynamic diameter less than 2.5 μm (PM2.5) and less than 10 μm (PM10), carbon monoxide (CO), sulfur dioxide (SO2), nitrogen dioxide (NO2), and ozone (O3)) in western China, including the spatiotemporal characteristics of air pollutants, their relationship with meteorological factors and emission sources, and the efficiency of emission control strategies for the region. Based hourly observations at 23 sites in western China from June 2016 to May 2017, concentrations of most pollutants were higher outside the Tibetan Plateau, lowest in summer and highest in winter, the exception being O3. This was partially because meteorological conditions in winter were found to the most unfavorable to pollutant dispersion and dilution than other seasons. Pollutant concentrations at most sites were correlated with the residential emissions which were higher in winter, but anti-correlated with the industrial emissions which were lower during the winter holiday period. The Weather Research and Forecasting with Chemistry (WRF-Chem) simulations of four pollution control strategies indicated that reduction of residential emissions is crucial to alleviate PM2.5, PM10, and CO pollution in western China, although reduction of industrial and transport emissions can reduce SO2 and NO2, respectively. Since PM2.5 and PM10 were also found to be the species most and next frequently responsible for extremely serious pollution in western China, respectively, we recommend pollution control regulations that target residential emissions.
- Subjects :
- Pollution
China
Ozone
010504 meteorology & atmospheric sciences
Meteorological Concepts
Health, Toxicology and Mutagenesis
media_common.quotation_subject
Nitrogen Dioxide
010501 environmental sciences
Toxicology
Atmospheric sciences
01 natural sciences
chemistry.chemical_compound
Meteorology
Air pollutants
Air Pollution
Sulfur Dioxide
Nitrogen dioxide
Weather
Sulfur dioxide
0105 earth and related environmental sciences
media_common
Pollutant
geography
Air Pollutants
Carbon Monoxide
Plateau
geography.geographical_feature_category
General Medicine
chemistry
Housing
Particulate Matter
Seasons
Subjects
Details
- ISSN :
- 18736424
- Volume :
- 254
- Database :
- OpenAIRE
- Journal :
- Environmental pollution (Barking, Essex : 1987)
- Accession number :
- edsair.doi.dedup.....1966cc0d3f6ad29f152c23e0b1b14356