Environment
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NASA tracks polar ice effect on Earth spin
Noticias Ambientales··26 Jul
NASA JPL research shows Earth's rotation varies by milliseconds and its polar axis wobbles. Polar ice melt in Greenland and Antarctica shifts mass toward the equator, slowing spin slightly. Atmospheric friction, El Niño, and jet streams drive most short-term day-length change, per scientist David Salstein. Core dynamics and lunar tidal friction add one point five to two milliseconds per century.
Prism
What It Means For You
- Climate change discussions now include subtle planetary spin effects, not just sea level.
- Tech sectors relying on precise timing may track NASA leap-second research.
- Readers see how polar melt connects global warming to geophysical measurement.
What's Happening
- NASA JPL published research on rotation milliseconds and polar wobble.
- Ice melt, atmospheric friction, core dynamics, and tidal drag all contribute.
- Salstein noted weather drives most short-term day-length change.
Why Milliseconds Matter to NASA
- Leap seconds adjust atomic clocks when rotation shifts accumulate.
- Greenland and Antarctica ice loss accelerated in satellite eras.
- GPS systems depend on precise Earth orientation models.
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