Convective Clouds (IMAGE) University of Copenhagen - Niels Bohr Institute Caption So-called 'convective' clouds are formed when there is a significant warming of the surface and a sufficient amount of moisture. Credit (Credit: J. O. Haerter) Usage Restrictions (Credit: J. O. Haerter) 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.