Megadrought is a term we’ve been hearing a lot of lately, with, as we find out from one of our guests, somewhat varying definitions. The term megadrought is generally used to describe the length of a drought, and not its acute intensity. A related term, aridity, is the degree to which climate lacks effective, life-promoting moisture. Simply put, aridity is permanent, while drought is temporary. But when drought extends multiple decades, as we are currently experiencing, is it actually aridifi...