Seasonal Dust Storm Spikes (IMAGE) NASA/Goddard Space Flight Center Caption This graph shows how the amount of water in the atmosphere of Mars varies depending on the season. During global and regional dust storms, which happen during southern spring and summer, the amount of water spikes. Credit University of Arizona/Shane Stone/NASA Goddard/Dan Gallagher 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.