Table 2 Changes projected for average power generation in Switzerland over the period 2021–2050 compared with 1980–2009 (after Hänggi et al. 2011c)

Alternative Summer [%] Winter [%] Year [%]
Optimistic -4.4 +10.1 +1.9 (0.7 TWh)
Pessimistic -6.3 +10.1 +0.9 (0.3 TWh)