The world ocean has experienced a net warming of 0.11 degrees Fahrenheit from the sea surface through about 10,000 feet of depth over the past 35-45 years. The upper 1,000 feet has warmed by 0.56 degrees Fahrenheit. "Although these may seem like small changes, it represents a large change in the heat content of the ocean," said Sydney Levitus, an oceanographer with the National Oceanographic and Atmospheric Administration. "Water is very effective at absorbing heat without undergoing much of a temperature change."
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