The release of carbon dioxide and other greenhouse gases into the atmosphere is associated with temperature changes in both the atmosphere and the oceans. The oceans play a vital role in global temperature changes, storing both heat and greenhouse gases. Without the oceans the atmosphere would warm at two to three times greater a rate, other factors remaining equal. To understand and predict global warming, then, it is important to measure, rather than just speculate on, changes in the heat content of the ocean.

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