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Geophysics & Environmental Physics

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Geophysics & Environmental Physics

Chandler Wobble

A small periodic nutation wobble of Earth's rotational axis relative to its solid crust with a period of ~433 days.

Period T ≈ 433 days, Amplitude ~ 3–15 meters Arcseconds or Meters at Surface Geophysics & Environmental Physics

Continental Drift

The historical hypothesis proposed by Alfred Wegener in 1912 stating that Earth's continents were once joined in a single supercontinent…

Historical Wegener Hypothesis (Pangea Supercontinent) Geologic Time Scale (Millions of Years) Geophysics & Environmental Physics

Cryosphere

The collective portion of Earth's surface where water exists in solid frozen form.

Components: Sea Ice, Glaciers, Ice Sheets, Permafrost, Snow Cover km² (Spatial Extent) or Gt (Mass)