Research on the path of atmospheric pollutants and greenhouse gas cooperative control in megacities - A case study of Chengdu

Abstract

Cooperative control of pollution and carbon is essential for building a beautiful China and achieving the carbon peak. The pollution and carbon emission inventories used in existing cooperative control research are usually prepared based on different data, which may cause great uncertainty in the proposed cooperative control measures. In this research, focusing on achieving the air quality standard and carbon peak (hereinafter referred to as dual goals) and taking Chengdu as a case study, an integrated pollution and carbon emission inventory was built based on a unified source emission framework structure; and a pollution and carbon coupling analysis method of economic development-energy consumption-atmospheric pollutant emissions at the urban scale was established combined with the LEAP-Chengdu localization model; in addition, the path of atmospheric pollutant and greenhouse gas cooperative control were proposed based on the improvement effect of PM_2.5 and O₃ concentrations. The results show that the main sources of pollution and carbon emissions in Chengdu are transportation, stationary combustion and industrial process, and transportation contributes 86.8 % of the total NO_x emissions. Under the carbon peak scenario, Chengdu's greenhouse gas emissions are expected to reach a peak in 2028. New energy alternatives for transportation will become the main driving force. Based on the carbon peak scenario, cooperative control scenarios with more stringent measures may achieve air quality improvement goals. To achieve the dual goals in 2030, all existing process technology and end-of-pipe emission control measures for atmospheric pollutant emission reduction need to be applied.