College of Biology and the Environment, Joint Center for sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037, China; Yale-NUIST Center on Atmospheric Environment, International Joint Laboratory on Climate and Environment Change (ILCEC), Nanjing University of Information, Science & Technology, Nanjing 210044, China.
Jiangxi Province Key Laboratory of the Causes and Control of Atmospheric Pollution/School of Water Resources and Environmental Engineering, East China University of Technology, Nanchang 330013, China.
J Environ Sci (China). 2022 Mar;113:165-178. doi: 10.1016/j.jes.2021.04.016. Epub 2021 Jun 25.
Strict air pollution control measures were conducted during the Youth Olympic Games (YOG) period at Nanjing city and surrounding areas in August 2014. This event provides a unique chance to evaluate the effect of government control measures on regional atmospheric pollution and greenhouse gas emissions. Many previous studies have observed significant reductions of atmospheric pollution species and improvement in air quality, while no study has quantified its synergism on anthropogenic CO emissions, which can be co-reduced with air pollutants. To better understand to what extent these pollution control measures have reduced anthropogenic CO emissions, we conducted atmospheric CO measurements at the suburban site in Nanjing city from 1 July to 30 September 2014 and 1 August to 31 August 2015, obvious decrease in atmospheric CO was observed between YOG and the rest period. By coupling the a priori emission inventory with atmospheric transport model, we applied the scale factor Bayesian inversion approach to derive the posteriori CO emissions in YOG period and regular period. Results indicate CO emissions from power industry decreased by 45%, and other categories also decreased by 16% for manufacturing combusting, and 37% for non-metallic mineral production. Monthly total anthropogenic CO emissions were 9.8 (±3.6) × 10 kg/month CO for regular period and decreased to 6.2 (±1.9) × 10 kg/month during the YOG period in Nanjing city, with a 36.7% reduction. When scaling up to whole Jiangsu Province, anthropogenic CO emissions were 7.1 (±2.4) × 10 kg/month CO for regular period and decreased to 4.4 (±1.2) × 10 kg/month CO during the YOG period, yielding a 38.0% reduction.
2014 年 8 月，南京及周边地区实施了严格的空气污染控制措施，以保障青年奥林匹克运动会（青奥会）的顺利进行。这一事件为评估政府控制措施对区域大气污染和温室气体排放的影响提供了独特的机会。许多先前的研究已经观察到大气污染物种类显著减少和空气质量改善，但没有研究量化其对人为 CO 排放的协同作用，因为 CO 可以与大气污染物共同减少。为了更好地了解这些污染控制措施在多大程度上减少了人为 CO 排放，我们在 2014 年 7 月 1 日至 9 月 30 日和 2015 年 8 月 1 日至 8 月 31 日期间在南京市郊区站点进行了大气 CO 测量。在青奥会期间和其余时间，大气 CO 明显减少。通过将先验排放清单与大气传输模型耦合，我们应用了尺度因子贝叶斯反演方法，以获得青奥会期间和常规期间的 CO 后验排放。结果表明，电力行业 CO 排放量减少了 45%，制造业燃烧和非金属矿物生产的其他类别排放量分别减少了 16%和 37%。常规期间南京市每月人为 CO 排放量为 9.8（±3.6）×10 kg/月 CO，而在青奥会期间减少到 6.2（±1.9）×10 kg/月 CO，减少了 36.7%。当扩展到整个江苏省时，常规期间人为 CO 排放量为 7.1（±2.4）×10 kg/月 CO，而在青奥会期间减少到 4.4（±1.2）×10 kg/月 CO，减少了 38.0%。
