Recent global decline of CO2 fertilization effects on vegetation photosynthesis

The enhanced vegetation productivity driven by increased concentrations of carbon dioxide (CO₂) [i.e., the CO₂ fertilization effect (CFE)] sustains an important negative feedback on climate warming, but the temporal dynamics of CFE remain unclear. Using multiple long-term satellite- and ground-based datasets, we showed that global CFE has declined across most terrestrial regions of the globe from 1982 to 2015, correlating well with changing …