Fig. 3: Annual CO2 emissions.
From: Endogenous learning for green hydrogen in a sector-coupled energy model for Europe
Three different budgets are assumed for Europe deducted from the global budget assuming equal per capita share (i) budget 25.7 Gt (+1.5oC), (ii) 45 Gt (+1.7oC), (iii) 73.9 Gt (+2oC). Further, carbon neutrality is required in all scenarios by 2050. The hashed line shows a scenario with the default learning rate presented in Table 1. Contour indicates scenarios with ± 10% variation of the learning rate for all technologies with endogenous learning. We compare the budget scenarios with a fourth scenario (noCO2limit) in which we do not specify any CO2 constraints.
