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The impacts of urbanization on air quality over the Pearl River Delta in winter: roles of urban land use and emission distribution |
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| Authors: | Bin Chen Shuai Yang Xiang-De Xu Wei Zhang |
| Institution: | 1. State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences, Beijing, 100081, People’s Republic of China 2. Laboratory of Cloud-Precipitation Physics and Severe Storms (LACS), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, People’s Republic of China 3. Shenzhen Research Institute, The Chinese University of Hong Kong, Shatin, Hong Kong, People’s Republic of China, 999077 4. Key Laboratory of Geographic Information Science, Ministry of Education, East China Normal University, Shanghai, People’s Republic of China, 200241 5. Key Laboratory of Meteorological Disaster of Ministry of Education, and Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science & Technology, Nanjing, People’s Republic of China, 210044 |
| Abstract: | In this study, ideal but realistic numerical experiments are performed to explore the relative effects of changes in land use and emission distribution on air quality in the Pearl River Delta (PRD) region in winter. The experiments are accomplished using the Lagrangian particle transport and dispersion model FLEXPART coupled with the Weather Research and Forecasting model under different scenarios. Experiment results show that the maximum changes in daily mean air pollution concentration (as represented by SO2 concentration) caused by land use change alone reaches up to 2?×?10?6 g m?3, whereas changes in concentrations due to the anthropogenic emission distribution are characterized by a maximum value of 6?×?10?6 g m?3. Such results reflect that, although the impacts of land use change on air quality are non-negligible, the emission distribution exerts a more significant influence on air quality than land use change. This provides clear implications for policy makers to control urban air pollution over the PRD region, especially for the urban planning in spatial arrangements for reasonable emissions. |
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