Extended Data Fig. 8: Methodology framework.
From: Nitrogen cycles in global croplands altered by elevated CO2
Meta-analysis is conducted to assess the impacts of elevated CO2 (eCO2) on N and C cycles. Crop N budgets are generated based on the IMAGE and CHANS models using multi-source data. In scenario analysis, we simulate rising CO2 levels by integrating the eCO2 impacts on N and C cycles in meta-analysis into the CHANS model for optimizing parameterization and projecting future cropland N budgets.
