Scientists say they have "compelling" evidence that ocean warming over the past 40 years can be linked to the industrial release of carbon dioxide. US researchers compared the rise in ocean temperatures with predictions from climate models, and found human activity was the most likely cause. In coming decades,the warming will have a dramatic impact on regional water supplies, they predict. Details of the study were released at a major science meeting in Washington DC. The conference is the annual gathering of the American Association for the Advancement of Science (AAAS).