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Ocean's carbon dioxide uptake varies year to year

Data taken hourly by cargo ships show that how much of the greenhouse gas North Atlantic waters absorb varies more than thought.

Data gathered by cargo ships plying the North Atlantic between 2002 and 2007 show that the ability of surface waters there to sop up CO2 varies considerably but somewhat predictably from year to year. The finding may help scientists better estimate the future rate at which the planet-warming gas will build up in the atmosphere.

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