Know Climate Change

Science behind Climate Change


Topic Summary

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  • The most commonly used methods for detecting climate change are studies of
    • Tree rings
    • Pollen samples
    • Volcanic eruptions
    • Sea sediment
    • Ice core
    • Fossils
  • Observed changes in the climate include
    • Changes in earth’s average temperature
    • Changes in hydrological cycle
    • Changes in cryosphere
    • Changes in ocean and sea level
    • Changes in extreme weather events
  • Natural drivers for climate change include
    • Solar Activity - imparts major change in earth’s energy level
    • Radiative forcing - impacts the hydrological cycle, with the effect multiplied by positive feedback of water vapour
    • Continental drift - impacts the flows of ocean currents
    • Variations in the earth’s orbit - impacts the seasons on earth
    • Oceans - impacts heat content of the earth
  • Anthropogenic drivers of climate change bring
    • Changes in GHG concentration - impacts global warming
    • Changes in land-use - impacts rainfall pattern, soil pattern
    • Changes in aerosol level - impacts global temperature and rainfall pattern