Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, China; Shanghai Key Laboratory of Atmospheric Particle Pollution Prevention (LAP3), Shanghai 200433, China.
Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, China; Shanghai Key Laboratory of Atmospheric Particle Pollution Prevention (LAP3), Shanghai 200433, China; Institute of Eco-Chongming (IEC), No. 3663 Northern Zhongshan Road, Shanghai 200062, China.
Sci Total Environ. 2022 Dec 10;851(Pt 1):158119. doi: 10.1016/j.scitotenv.2022.158119. Epub 2022 Aug 18.
Clean air policies have achieved remarkable air quality improvement in China for the last decade. However, as more importance was attached to climate issues and further improvement of air quality, policies with greenhouse gas (GHG) reduction potential were supposed to play a significant role. Here, we designed a conventional legislation pathway scenario (CLP) and an enhanced greenhouse gas reduction scenario (EGR), to estimate the co-effects of policies effective in GHG reduction on air pollutant control and air quality improvement in the Yangtze River Delta (YRD) region from 2014 to 2020, adopting a measure-specific evaluation method and an integrated WRF-CAMx model simulation. Results showed that: 1) With the implementation of enhanced measures with GHG reduction potential, emissions of SO, NO, PM, PM, VOC and NH decreased by 16.4 %, 21.6 %, 18.6 %, 16.5 %, 23.9 % and 15.4 % in EGR scenario respectively, compared with CLP scenario. And the annual mean simulated concentrations of PM, SO and NO of the YRD decreased by 11.2 %, 15.4 % and 20.6 %, respectively. 2) The average 8-h maxima (MDA8) concentration of O presented a slightly increasing trend under the impacts of measures with GHG reduction potential, which might be on account of the unbalanced control of NO and VOC, the two major precursors of O. 3) Based on the source apportionment analysis, major partition of total ozone in the four receptors in YRD was from regional transportation, rather than local formation. And the major sectors contributing to ozone were industry and transportation sector. This study quantitatively assessed the co-benefits of GHG-control-effective policies and specific measures on air quality improvement, which would help to provide implications for future policy-making to achieve air pollution and climate change co-control.
过去十年，中国的清洁空气政策在改善空气质量方面取得了显著成效。然而，随着对气候问题的重视以及空气质量的进一步改善，具有温室气体（GHG）减排潜力的政策应该发挥重要作用。在这里，我们设计了一个常规立法途径情景（CLP）和一个增强的温室气体减排情景（EGR），以采用特定措施评估方法和综合 WRF-CAMx 模型模拟，估计在 GHG 减排方面有效的政策对 2014 年至 2020 年长江三角洲（YRD）地区控制空气污染物和改善空气质量的协同效应。结果表明：1）通过实施具有 GHG 减排潜力的强化措施，与 CLP 情景相比，EGR 情景下 SO、NO、PM、PM、VOC 和 NH 的排放量分别减少了 16.4%、21.6%、18.6%、16.5%、23.9%和 15.4%。并且，YRD 的 PM、SO 和 NO 的年平均模拟浓度分别降低了 11.2%、15.4%和 20.6%。2）在 GHG 减排措施的影响下，O 的 8 小时最大浓度（MDA8）呈略有上升趋势，这可能是由于 NO 和 VOC（O 的两个主要前体）的不平衡控制所致。3）基于源分配分析，YRD 四个受体中总臭氧的主要分配来自区域传输，而不是本地形成。对臭氧贡献最大的部门是工业和交通部门。本研究定量评估了 GHG 控制有效政策和具体措施对空气质量改善的协同效益，这将有助于为未来实现空气污染和气候变化协同控制的政策制定提供启示。
