These assumed that the largest decreases in rainfall would be in winter and spring (decreases of 5 % and 11 % between 1990 and 2030 on the low and high global
warming scenarios respectively), but rainfall was fractionally HIGHER in winter / spring in the more recent period (1995 - 2006) than in the previous 11 - year period.
Averaged across the AOGCMs analysed, the global mean
warming by 2090 - 2099 relative to 1980 - 1999 is projected to be 1.8, 2.8, and 3.4 °C for the B1, A1B, and A2
scenarios,
respectively.