ClimateChange will continue to speed up ocean currents, a new study suggests, potentially limiting the heat the ocean can capture and complicating migrations for already stressed marine life.
: Not only have oceans been warming because of human-driven climate change, but the currents that flow through them have accelerated—by some 15% per decade from 1990 to 2013. At the time, many scientists suspected faster ocean winds were driving the speedup. But a new modeling study fingers another culprit: the ocean’s own tendency to warm from top to bottom, leading to constricted surface layers where water flows faster, like blood in clogged arteries.
Currents like the Atlantic Ocean’s Gulf Stream are highways for marine life, ushers of heat, and drivers of storms. Driven in large part by wind, each of them moves as much water as all the world’s rivers combined. And, despite the fact that the ocean absorbs more than 90% of the heat caused by global warming, until 2020, there had been little evidence that these currents were changing.
France Dernières Nouvelles, France Actualités
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