How has climate change affected the global distibution of ice?

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Current warming trend is linked to human activities.

Climate change in past was entirely natural, and could've been caused by:

  • subtle variations in the earth's orbit.
  • slight changes in its tilt towards the sun.
  • variations in the global pattern of ocean currents, which moves heat around the world.

El Nino effect is a periodic 'blip' in the usual global climate. Found off the west coast of S Ameria - caused by a short-term reduction in the intensity of the cold ocean currents. Results in unusual patterns of temperature and rainfall, and…

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