Positive responses of crop yields to climate change have alsobeen predicted by Eitzinger et al. (2003) using CERES-Wheat forthe semi-arid growth condition at two sites, one in southeasternCzech Republic and another one in northeastern Austria. They com-pared historic climate with CC scenarios projected by three IPCCGCMs. The averaged scenario comprised an average annual changein temperature of +3.0◦C and an increase in annual precipitation of3.9%. Assuming an increase of the atmospheric CO2concentrationsto 660 ppm, Eitzinger et al. (2003) predicted notably higher yieldson both sites compared to historic (1985–1993) conditions. At thesame time – similar to our results – crop transpiration and waterstress dropped significantly in response to a simulated increase inwater use efficiency and reduced total potential evapotranspirationcaused by shortened growing period.