NPS-Researchers-Ocean-Rings (IMAGE) Naval Postgraduate School Caption NPS Department of Oceanography doctoral student Larry Gulliver and Professor Timour Radko have solved a decades-old mystery surrounding the seemingly variant lifespan of circular currents known as ocean rings. Their discovery landed their research on the cover of the “Geophysical Research Letters” edition publishing the results of their work. Credit Mass Communication Specialist 2nd Class Huy Tonthat, U.S. Navy Usage Restrictions No restrictions. License Public Domain 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.