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Enlarge ImageIn and out. Driven by winds, the Southern Ocean's currents (blue globe) transport CO2 (red) northward.Credit: T. Ito et al., Nature 463 (2010) Much of the carbon dioxide in Earth's atmosphere goes south, literally. Researchers using new supercomputer models have described for the first time how the Southern Ocean sucks the greenhouse gas out of the air and then shuttles it into the deep sea far from the Antarctic. The findings should give climate scientists a better understanding of this critical component of Earth's carbon cycle. The carbon dioxide (CO2) emitted into the atmosphere ends up several places....