California Precipitation Modeling (IMAGE) DOE/Pacific Northwest National Laboratory Caption California has undergone a drying trend during the last four decades. Credit Image by National Oceanic and Atmospheric Administration | NASA.gov Usage Restrictions NASA credit 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.