Extended Data Fig. 2: Comparative projections of lake greenhouse gas emission rates (CO2eq, CO2, CH4, N2O) in Chinese lakes under a High Nutrient Reduction Scenario across Four Shared Socioeconomic Pathways (SSP1-2.6, SSP2-4.5, SSP3-7.0, and SSP5-8.5).

Total CO2‑equivalent emissions are calculated by converting CH4 and N2O fluxes to CO2 equivalents using the Sustained Global Warming Potential (SGWP) metric. The definition of the ‘High Nutrient Reduction Scenario’ is provided in the Methods section.