New study finds global warming slows Earth rotation through atmospheric changes
Scientists published research in npj Climate and Atmospheric Science on October 3, 2026, explaining how climate change alters the planet's spin rate.
Atmospheric circulation shifts under warming
Researchers used large-ensemble climate simulations from three different global models to examine future atmospheric evolution. Their analysis showed that the Hadley cell expands toward the poles while subtropical jets become stronger. These specific changes in wind patterns systematically increase atmospheric angular momentum across the globe.
Surface momentum exchange weakens
A critical finding is that momentum transfer between the air and solid ground decreases significantly. This reduction lowers Earth's ability to match the changing speed of the atmosphere above. The combined effect of these factors results in a measurable slowdown of the planet's rotation.
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