[Analysis of Carbon Neutrality and Economic and Ecological Indices in the Yanshan-Taihang Mountains].

The productivity of terrestrial ecosystems is crucial for regional ecological security and global carbon cycling. Exploring the spatiotemporal changes of carbon sinks and their ecological value provides insights for the government to formulate measures to reduce carbon emissions and achieve carbon neutrality. Based on the calculation of net primary productivity （NPP） for the Yanshan-Taihang Mountains from 2000 to 2021 to estimate carbon absorption and fitting night-time light data to calculate carbon emissions， along with the use of carbon dioxide diffusion coefficients， the spatiotemporal characteristics of carbon neutrality and the spatial range of carbon sequestration services were analyzed. This was combined with the comprehensive economic and ecological index （C-GDP） to explore the balance between economic and ecological development. The results indicate： ① The net ecosystem productivity （NEP） of the Yanshan-Taihang Mountains fluctuated and Increased over time and spatially presented high values in the middle surrounded by low values， with a higher NEP in the Yan Mountains Region than in the Taihang Mountains Region. ② The carbon sequestration showed an increasing trend after 2018， with higher carbon sequestration growth in the Yanshan Mountains than in the Taihang Mountains. ③ The carbon sequestration service scope of the Yanshan-Taihang Mountains from 2000 to 2021 ranged from 184.8 to 913.5 km and showed a trend of decrease followed by an increase over time. ④ The C-GDP showed a growing trend over time， with the high carbon sink area of the Yanshan Mountains having a lower C-GDP than the low carbon sink area of the Taihang Mountains and the monetized value of carbon sequestration being lower than the economic benefits brought by high GDP production.