Figure 7. Latitudinal distribution of harvest area, and impacts of climate change on consumptive water use (CWU) for wheat, maize and rice.

A cut-off for changes in CWU >150% is used to allow for a better interpretation of the impacts of climate change in current major growing regions where changes are mostly within a range of −50% – +50%. Cut-offs often occur at the latitudes where harvested areas are marginal currently.