Assessment of the Impacts of Different Carbon Sources and Sinks on Atmospheric CO₂ Concentrations Based on the GEOS-Chem Model

• DOI: 10.20944/preprints202501.2368.v1
• Publication Date: 2025-02-06T02:35:16Z
• Authors: Ge Qu; Jia Zhou; Yusheng Shi; Yong liang Yang; Meng qian Su; Wen Wu; Zhi tao Zhou
• Keywords: Carbon sink

Global CO2 concentration has become a key driver of climate change, influenced by both anthropogenic emissions and natural carbon cycles. However, due to the spatiotemporal heterogeneity sources sinks, estimating flux remains highly uncertain. Accurately quantifying contribution various sinks atmospheric is essential for understanding cycle global balance. This study utilizes GEOS-Chem model, driven MERRA2 meteorological data emission inventory data, simulate monthly concentrations from 2006 2010. The “Inventory switching replacing” method was applied assess contributions eight major sinks: fossil fuel combustion, biomass burning, biosphere balance, net land exchange, aviation, shipping, ocean chemical sources. results show that exhibits spatial pattern with higher in Northern Hemisphere areas, East Asia, Southeast Eastern North America being high-concentration regions. average increased 1.8 ppm/year 2010, China’s eastern region experiencing highest growth rate 3.0 ppm/year. Fossil combustion identified as largest source, followed while oceans serve significant sinks. impact on closely related distribution magnitude emissions.