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| Sensitivity analysis of PM2.5 pollution to ammonia emission control in China |
| XU Yan-ling1, XUE Wen-bo2, LEI Yu2, YI Ai-hua3, WANG Jin-nan2, CHENG Shui-yuan1, REN Zhen-hai4 |
1. College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China;
2. Chinese Academy For Environmental Planning, Beijing 100012, China;
3. The Appraisal Center for Environment and Engineering, The State Environmental Protection Ministry, Beijing 100012, China;
4. Chinese Research Academy of Environmental Sciences, Beijing 100012, China |
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Abstract The air quality modelling system WRF-CMAQ was applied to study the sensitivity of annual PM2.5 concentration to NH3 emission control with the scenario analysis approach.The results showed reducing NH3 emissions would lead to significant drop of PM2.5,nitrate and ammonium concentration,but relatively less impact on sulfate concentration.And annual average concentrations of PM2.5,nitrate,ammonium were estimated to decline faster when emission of NH3 are further controlled.The sensitivity of PM2.5 to NH3 were 0.14,0.16,0.19,0.24 and 0.30,when NH3 emission is cut by 20%,40%,60%,80% and 100%,respectively,and the concentration of PM2.5 would decline by 2.7%,6.3%,11.3%,19.0% and 29.8% thereby.Strong spatial features were observed on the impact of NH3 emissions on PM2.5 concentration.Control of NH3 would promote reducing PM2.5 pollution in regions with high NH3 emission,such as Hebei,Henan,Hubei and Hunan Province and Chengdu-Chongqing region.
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Received: 22 November 2016
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