(IMAGE) Johannes Gutenberg Universitaet Mainz Caption Jan Esper, Professor of Climate Geography at the Institute of Geography of Johannes Gutenberg University Mainz Credit photo/©: private Usage Restrictions Credit must be given to the creator. Only noncommercial uses of the work are permitted. No derivatives or adaptations of the work are permitted. License CC BY-NC-ND 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.