Abstract The transport sector has become an important source of urban greenhouse gas (GHG) and air pollutant emissions, with the continuous growth of transportation demand. The co-benefits of reducing GHG and air pollutant emissions in the transport sector are receiving more and more attention. Taking Guangzhou as the case study city, this study quantitatively analyzed the co-benefits of reducing CO2 and air pollutant emissions under the sustainable scenario in the transport sector by developing a quantitative analysis model based on the Long-range Energy Alternatives Planning (LEAP) framework. The co-benefits quantitative parameter and the co-benefits radar chart analysis method are used to identify and evaluate the generated co-benefits, and then the co-benefits generated by implementing the sustainable measures are discussed. The results show that adjusting transport modes and increasing the application of electricity are the two most effective measures for achieving the co-benefits of reducing CO2 and air pollutant emissions in the Guangzhou transport sector. Thus, these two measures are highly preferential for mitigating CO2 and air pollutant emissions. In addition, increasing the application of biofuel and hydrogen energy also has good co-benefits. However, increasing the application of Liquefied Natural Gas (LNG) has poor co-benefits. Promoting the utilization of LNG intercity buses, trucks, and cargo ships will lead to emission increases of CO and HC compared to the current policy scenario, and small emission reductions of CO2 and other air pollutants. Therefore, to promote the utilization of LNG vehicles and ships, it is necessary to cooperate with the use of air pollutant end removal devices and high-pressure direct injection (HPDI) gas engines.

中文翻译：

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减少城市交通部门二氧化碳和大气污染物排放的协同效益：以广州为例

摘要 随着交通需求的不断增长，交通部门已成为城市温室气体（GHG）和大气污染物排放的重要来源。减少交通部门温室气体和空气污染物排放的协同效益越来越受到关注。本研究以广州为案例研究城市，通过建立基于长期能源替代规划（LEAP）框架的定量分析模型，定量分析了交通部门在可持续情景下减少二氧化碳和空气污染物排放的协同效益. 利用协同效益量化参数和协同效益雷达图分析方法对产生的协同效益进行识别和评价，进而讨论实施可持续措施所产生的协同效益。结果表明，调整交通方式和增加电力应用是广州交通部门实现二氧化碳减排和大气污染物减排协同效益的两项最有效措施。因此，这两项措施对于减少 CO2 和空气污染物排放非常有利。此外，增加生物燃料和氢能的应用也具有良好的协同效益。然而，增加液化天然气 (LNG) 的应用并没有带来很好的协同效益。与当前政策情景相比，推广 LNG 城际巴士、卡车和货船的使用将导致 CO 和 HC 的排放增加，以及 CO2 和其他空气污染物的小幅减排。因此，为促进LNG车船的利用，