Yan and Trenberth (IMAGE) University of Delaware Caption UD's Xiao-Hai Yan with co-author Kevin Trenberth from the National Center for Atmospheric Research, who visited the University earlier this fall. Credit Enhui Liao 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.