Map 27.1 - Changes in January surface air temperature (C) over Europe as a result of doubled CO2:
Source: IPCC, 1992
a) results from general circulation model (GCM) of the National Center for Atmospheric Research, Boulder, Colorado, USA, relative to the GCM control;
b) results from nested mesoscale model relative to the nested model control (Giorgi et al, 1991)