articleAtmospheric chemistry and physicsMar 17, 2015GOLD OA

Exploring the severe winter haze in Beijing: the impact of synoptic weather, regional transport and heterogeneous reactions

GZGuangjie ZhengFDFengkui DuanHSHang SuYLY. L.YCYuan Cheng

State Key Joint Laboratory of Environment Simulation and Pollution Control · Tsinghua University · +1 more institution

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Abstract

Abstract. Extreme haze episodes repeatedly shrouded Beijing during the winter of 2012–2013, causing major environmental and health problems. To better understand these extreme events, we performed a model-assisted analysis of the hourly observation data of PM2.5 and its major chemical compositions. The synthetic analysis shows that (1) the severe winter haze was driven by stable synoptic meteorological conditions over northeastern China, and not by an abrupt increase in anthropogenic emissions. (2) Secondary species, including organics, sulfate, nitrate, and ammonium, were the major constituents of PM2.5 during this period. (3) Due to the dimming effect of high loading of aerosol particles, gaseous oxidant…

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Topics & keywords

Topics
Keywords
  • Aerosol
  • Haze
  • Beijing
  • Environmental science
  • Pollution
  • Sulfate
  • Atmospheric sciences
  • Pollutant
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