Suitability of Desert Zones (IMAGE) Proceedings of the National Academy of Sciences Caption Suitability of desert zones for rainfall enhancement in June as indicated by a monthly Global Feedback Index climatology (2009-2017), based on atmospheric conditions. A score of 3 signifies the highest potential for rainfall enhancement and 0, the lowest potential. � Credit Image courtesy of Oliver Branch 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.