Simulating Grassland Carbon Dynamics in Gansu for the Past Fifty (50) Years (1968–2018) Using the Century Model

China is one of the countries most impacted by desertification, with Gansu Province in northwest being affected areas. Efforts have been made recent decades to restore natural vegetation, while also producing food. This has implications for soil carbon sequestration and, as a result, country’s budget. Studies (C) dynamics this region would help understand effect management practices on organic (SOC) well aboveground biomass (ABVG), and aid informed decision-making policy implementation alleviate rate global warming. It region’s contribution national C inventory China. The CENTURY model, process-based model that capable simulating over long period, not calibrated suit Province, despite an effective estimation. Using grassland maps Gansu, together weather, soil, reliable historical data province, we province’s grasslands. was then used simulate between 1968 2018. results show significant accuracy. Our measured observed SOC density (SOCD) ABVG had correlation coefficients 0.76 0.50, respectively, at p < 0.01. Precipitation correlated SOCD 0.57 0.89, total storage (SOCS) 436.098 × 106 t (approximately 0.4356% average) average 15.75 C/ha. There high southeast it decreased towards northwest. same phenomenon spatial distribution SOCD. Among soils studied, Hostosols highest (25.6 C/ha) Gypsisols having least (7.8 C/ha). Between 2018, stock gradually increased, experiencing greatest increase.