We investigated the magnitude and spatial extent of extreme temperature and specific humidity events in the extra - tropical northern hemisphere. (cires.colorado.edu)
In particular, persistent changes have emerged in observations earlier and over a larger spatial extent than predicted by models. (pacificclimate.org)
As far as we know, there is no reason why droughts of the duration, severity, and spatial extent experienced in the medieval period could not occur in the future. (dotearth.blogs.nytimes.com)