Gas Hydrate Mounds in Arctic Ocean (IMAGE) UiT The Arctic University of Norway Caption One of the gas hydrate mounds, also known as pingos, on the ocean floor in the Arctic. Illustration: Pavel Serov. Credit Pavel Serov; CAGE - Centre for Arctic Gas Hydrate, Environment and Climate 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.