From Fields to Dunes (IMAGE) DOE/Lawrence Berkeley National Laboratory Caption If dried-out soil and hot, dry atmosphere interact to trigger abrupt climate change in the Southwest, megadroughts like those that plagued North America a millenium ago could quickly return. Credit Berkeley Lab Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.