Ice & Albedo: Earth's Energy Balance
Modern EarthFeedback: OnBright ice reflects sunlight. That one fact gives Earth more than one possible climate, with a tipping point between them.
Ice-albedo feedbackIce changes how much sunlight is reflected.
Natural eventsA short shock: haze blocks sunlight for years, then settles out of the atmosphere.The long lever: ages of eruptions push the CO₂ slider itself, until the ice gives way. Rain brings it back down.
CO₂ in the atmosphere (420 ppm)That is about today. More CO₂ traps more heat and reshapes the landscape. Watch the valleys move.