Effectiveness of national air pollution control policies on the air quality in metropolitan areas of China

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• 作者：Shuxiao Wang ; Jia Xing ; Bin Zhao ; Carey Jang ; Jiming Hao
• 关键词：air pollution control ; sulfur dioxide ; nitrogen oxides ; power plant
• 刊名：Journal of Environmental Sciences
• 出版年：1 January, 2014
• 年：2014
• 卷：26
• 期：1
• 页码：13-22
• 全文大小：1757 K

文摘

Understanding the effectiveness of national air pollution controls is important for control policy design to improve the future air quality in China. This study evaluated the effectiveness of major national control policies implemented recently in China through a modeling analysis. The sulfur dioxide (SO₂) control policy during the 11th Five Year Plan period (2006-2010) had succeeded in reducing the national SO₂ emission in 2010 by 14% from its 2005 level, which correspondingly reduced ambient SO₂ and sulfate (SO₄^2-) concentrations by 13%-15% and 8%-10% respectively over east China. The nitrogen oxides (NOx) control policy during the 12th Five Year Plan period (2011-2015) targets the reduction of the national NOx emission in 2015 by 10% on the basis of 2010. The simulation results suggest that such a reduction in NOx emission will reduce the ambient nitrogen dioxide (NO₂), nitrate (NO₃^{鈭?/sup>), 1-hr maxima ozone (O₃) concentrations and total nitrogen deposition by 8%, 3%-14%, 2% and 2%-4%, respectively over east China. The application of new emission standards for power plants will further reduce the NO₂, NO₃鈭?/sup> 1-hr maxima O₃ concentrations and total nitrogen deposition by 2%-4%, 1%-6%, 0-2% and 1%-2%, respectively. Sensitivity analysis was conducted to evaluate the inter-provincial impacts of emission reduction in Beijing-Tianjin-Hebei and the Yangtze River Delta, which indicated the need to implement joint regional air pollution control.}