Fig. 5: Effect of greenhouse warming on the North American GPP. | Communications Earth & Environment

Fig. 5: Effect of greenhouse warming on the North American GPP.

From: Tropical Indian Ocean forcing on North American terrestrial and agricultural productivity decline under greenhouse warming

Fig. 5

The evolution of North American GPP (gC m−2 month−1) in the model experiments includes several scenarios: quadrupling of CO2 (4×CO2), quadrupling of CO2 with preindustrial mean TIO SST (4×CO2+TIOclim), present-day CO2 levels (PD), and present-day CO2 with preindustrial mean TIO SST (PD+TIOclim). Perturbations are introduced at time zero and maintained throughout the experiments. A 5-year running mean is applied to all the curves. The thick line indicates average values, while shading represents the ensemble spread over 50 years.

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