Around the World (IMAGE) Columbia Climate School Caption The global ocean overturning circulation, shown here in a simplified illustration, distributes heat through the oceans. In the Atlantic Ocean, the circulation carries warm water (red arrows) northward near the surface and cold deep water (blue arrows) southward. Credit NASA/JPL Usage Restrictions Credit must be given. 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.