Oceans may not absorb as much heat from climate change as expected, Nasa has discovered, after recruiting a seal to monitor how currents move warm water.
Experts at the US Space Agency’s Jet Propulsion Laboratory in Pasadena, California, tagged a southern elephant seal and monitored temperature changes as it swam more than 3,000 miles in the Antarctic Ocean.
Previously scientists believed that heat from global warming was being sucked down from the surface into the deep ocean, and feared that temperatures could rise substantially when the process became exhausted.
But the results showed that there are other currents that move the warm water back up again, from where it can evaporate.
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