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Modelling the Effect of Aerosol Feedbacks on the Regional Meteorology Factors over China

Category: Air Pollution Modeling

Volume: 15 | Issue: 4 | Pages: 1559-1579
DOI: 10.4209/aaqr.2014.11.0272
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Dongsheng Chen 1, Xin Ma1,2, Xin Xie1, Peng Wei3, Wei Wen1, Tingting Xu1, Nan Yang1, Qingxian Gao3, Huading Shi 3, Xiurui Guo1, Yue Li4, Ying Zhou1, Jianlei Lang1

  • 1 College of Environmental & Energy Engineering, Beijing University of Technology, Beijing 100124, China
  • 2 National Meteorological Center, Beijing 100081, China
  • 3 Chinese Research Academy of Environment Science, Beijing 100012, China
  • 4 Transport Planning and Research Institute, Ministry of Transport, Beijing 100028, China

Highlights

Solar radiation, T, PBL height are declined over China due to aerosol feedback.
Monthly mean solar radiation in east China is twice higher than in east US.
Extinction in aerosol is higher than in cloud in China, which opposite in Europe.


Abstract

The fully coupled online air quality model WRF/chem was used to investigate the aerosol-radiation interaction and aerosol-cloud interaction on the regional meteorological factors over China in 2006.The aerosol-radiation interaction and aerosol-cloud interaction of aerosols influence the various regional meteorological factors in the worst aerosol-polluted regions of China. Domain-wide monthly-mean over all day and night hours incoming solar radiation decreased by –11.03 W/m2, –9.84 W/m2, –5.84 W/m2 and –12.37 W/m2; temperature at 2 meters (T2) decreased by –0.22°C, –0.12°C, –0.06°C and –0.24°C; Planetary boundary layer (PBL) height decreased by –16.44 m, –15.90 m, –5.48 m and –31.59 m in January, April, July and October, respectively. The values of the monthly-mean incoming solar radiation, T2 and PBL height had greater decreases in east China. Due to aerosol feedbacks, a slight increase of the monthly-mean precipitation occurred in southern and south-eastern China. The aerosol-radiation interaction and aerosol-cloud interaction of aerosols were compared for the United States (U.S.) continent, Europe, India and this study. Due to the higher aerosol load in China, the monthly-mean incoming solar radiation, T2 and PBL height exhibited greater decreases in China than in the U.S. continent and in Europe. Aerosol extinction was the dominant effect on the incoming solar radiation for either cloudless or cloudy weather conditions in China, but aerosol extinction was only apparent during cloudless weather in Europe. In India, the incoming solar radiation decreased by –20 W/m2 or more in the most aerosol polluted area, which is close to the value of decrease determined in China.

Keywords

Aerosol-radiation interaction Aerosol-cloud interaction Meteorological factors WRF/chem


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