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Climate Change Slows Earth’s Rotation
Coverage from Astronomy Magazine, Tech Times, and others
Research indicates that climate change is lengthening Earth’s day by redistributing mass through melting glaciers, ice sheets, rising seas, changing terrestrial water storage, and altered atmospheric circulation.
A reconstruction extending roughly 3.6 million years suggests the recent climate-driven increase in day length is unusually rapid, reaching about 1.33 milliseconds per century between 2000 and 2020. Although imperceptible in daily life, these changes matter for satellite navigation, spacecraft operations, Earth-orientation measurements, and precision timekeeping.
The story broadens from a mainly ice-melt attribution for slower rotation into a fuller climate-rotation framework that also includes atmospheric circulation and short-term rotational variability. It also sharpens the operational relevance by explicitly naming satellite, spacecraft, geodesy, and timekeeping systems.
The core scientific story is essentially unchanged and further confirmed. The main addition is a named researcher and historical groundwater-related polar-motion work, which modestly broadens the context without changing the central finding.
The story is now framed more narrowly around a climate-driven slowdown in Earth's rotation, with stronger emphasis on paleoclimate reconstruction methods and practical relevance for precision timing. The earlier atmospheric-circulation thread is deemphasized, while uncertainty is now tied more explicitly to proxy and model assumptions.
Recent research links climate change to measurable changes in Earth's rotation, with melting ice, sea-level rise, and atmospheric circulation shifts all contributing to a small but unusually rapid lengthening of the day. The strongest signal comes from paleoclimate reconstructions and climate-model studies that compare present-day change with long-term natural variability.