Polar ice melt caused by global warming is changing the speed of Earth’s rotation and increasing the length of each day, in a trend set to accelerate over this century as humans continue to pump out planet-heating pollution, according to the study published Monday in the Proceedings of the National Academy of Sciences.
33 milliseconds per century, “significantly higher than at any time in the 20th century,” according to the report. If planet-heating pollution continues to rise, warming the oceans and accelerating ice loss in Greenland and Antarctica, the rate of change is set to soar, the report found. If the world is unable to rein in emissions, climate change could increase the length of a day by 2.62 milliseconds by the end of the century — overtaking the natural impacts of the moon.
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