TY - JOUR
T1 - Impact of typical meteorological conditions on air pollution over Pearl River Delta in autumn
AU - Wang, Yuanlin
AU - Wang, Zhe
AU - Chen, Xueshun
AU - Wang, Zifa
AU - Fan, Shaojia
AU - Chen, Duohong
AU - Wu, Qizhong
N1 - Funding Information:
Supported by the National Key Technology R&D Program (No.2014BAC21B00) and the National Natural Science Foundation of China(No.41505115,41275071).
Publisher Copyright:
© 2017, Science Press. All right reserved.
PY - 2017/9/6
Y1 - 2017/9/6
N2 - Through analyzing the observed air quality index (AQI), pollutant concentrations, meteorological observations, synoptic charts and the WRF mesoscale numerical weather prediction results together, the impacts of weather conditions and meteorological characteristics on air pollution over the Pearl River Delta in October 2014 were investigated. Comparison with observations showed that WRF was able to reproduce temporal and spatial variations of ground-level and upper meteorological elements, with the correlation coefficient between simulated and observed average surface temperature, relative humidity and wind speed at nine cities of 0.90, 0.87 and 0.78, respectively. Analysis of all three pollution episodes in October showed that the bottom of the high-pressure control type and uniform pressure control type are the main meteorological factors of air pollution in the PRD. Low wind speed (<2 m·s-1) and pollutant transport along with the northerly wind led to the increase of the pollutant concentrations in the PRD. In addition, O3 was the primary pollutant when the relative humidity (RH) was lower than 65%, while PM2.5 became the primary pollutant when the RH was higher than 70%. The photochemical reaction during high temperature conditions also caused the increase of air pollution in the PRD.
AB - Through analyzing the observed air quality index (AQI), pollutant concentrations, meteorological observations, synoptic charts and the WRF mesoscale numerical weather prediction results together, the impacts of weather conditions and meteorological characteristics on air pollution over the Pearl River Delta in October 2014 were investigated. Comparison with observations showed that WRF was able to reproduce temporal and spatial variations of ground-level and upper meteorological elements, with the correlation coefficient between simulated and observed average surface temperature, relative humidity and wind speed at nine cities of 0.90, 0.87 and 0.78, respectively. Analysis of all three pollution episodes in October showed that the bottom of the high-pressure control type and uniform pressure control type are the main meteorological factors of air pollution in the PRD. Low wind speed (<2 m·s-1) and pollutant transport along with the northerly wind led to the increase of the pollutant concentrations in the PRD. In addition, O3 was the primary pollutant when the relative humidity (RH) was lower than 65%, while PM2.5 became the primary pollutant when the RH was higher than 70%. The photochemical reaction during high temperature conditions also caused the increase of air pollution in the PRD.
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U2 - 10.13671/j.hjkxxb.2017.0096
DO - 10.13671/j.hjkxxb.2017.0096
M3 - Article
AN - SCOPUS:85047564701
VL - 37
SP - 3229
EP - 3239
JO - Huanjing Kexue Xuebao / Acta Scientiae Circumstantiae
JF - Huanjing Kexue Xuebao / Acta Scientiae Circumstantiae
SN - 0253-2468
IS - 9
ER -
