4.14 Enhanced Greenhouse Gases

Notes


GHE brought about by GHG (water vapour, carbon dioxide, methane)
  - Increased gases = increased amount of IR light re-emitted back to Earth, RAISE AVERAGE GLOBAL TEMPERATURE (Global Warming)

Consequences


-> Melting of ice caps in polar region = CLIMATE CHANGE
   - raised sea levels,
   - changing ocean currents
   - changing wind currents

-> Raising ave. global temperature = changes in distribution of biomes (major vegetation ecosytems)
  - polar ice-caps melts
  - Deserts expand
  - Deciduous, coniferous forests would change