Kelvin-Helmholtz Waves in Clouds (IMAGE) NASA/Goddard Space Flight Center Caption The classic surfer's wave -- known as Kelvin-Helmholtz waves -- can be seen all around in nature, such as in these clouds. Credit Credits: Danny Ratcliffe 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.