The project aims to locate and quantify the emissions of the large urban area with higher accuracy and resolution, and to improve the present bottom-up estimates based on these results, supporting the Action Plan for Carbon Dioxide Peaking Before 2030 as a pilot project. Greenhouse gas concentrations in Zhengzhou, China are measured using a high-accuracy tower network and a high-density network of lower cost sensors installed around the city. Four high-accuracy tower continuous measurement stations and a hundred lower cost sensors tracking CO2, CH4, CO and H2O have been successfully installed. The emission estimates are derived by using these observations coupled with atmospheric transport and dispersion models, and inversion methods.
