PARIS - Scientists said Sunday they had unravelled the mechanism by which Earth-warming carbon is sucked deep into the Southern Ocean to be safely locked away - a process that may itself be threatened by climate change. Wind, eddies and currents work together to create carbon-sucking funnels, said the research team from Britain and Australia in a discovery that adds to the toolkit of scientists attempting climate warming predictions. About a quarter of the carbon dioxide on Earth is stored away in its oceans - some 40 percent of that in the Southern Ocean encircling Antarctica. At a depth of about 1,000 metres, carbon can be locked away for hundreds to thousands of years.