Causes and effects of climate change

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Causes and effects of climate change

  1. 1. CAUSES ANDEFFECTS OFCLIMATE CHANGEDate: 24th November 2012Presented by: NARAINO MAJIENabiilah
  2. 2. CONTENTDefinition of Climate ChangeCauses of Climate Change-Natural Causes & Human CausesEffects of Climate Change
  3. 3. DEFINITION OF CLIMATE CHANGE“ It is a change which is attributeddirectly or indirectly to human activitythat alters the composition of theglobal atmosphere and which is inaddition to natural climate variabilityobserved over comparative timeperiods”
  4. 4. CAUSES OF CLIMATE CHANGE NATURAL CAUSES Volcanic eruptions
  5. 5.  Ocean currents
  6. 6.  Earth orbital changes- More tilt = warmer summers & colderwinters Less tilt = cooler summers & milder winters
  7. 7.  Solar Variation
  8. 8.  HUMAN CAUSES (Anthropogenic or Man-madecauses) Greenhouse gases Deforestation Coal mining Burning of fossil fuels Industrial processes Agriculture
  9. 9.  Deforestation
  10. 10.  Coal Mining
  11. 11.  Burning of Fossil Fuels
  12. 12.  Industrial processes
  13. 13.  Agriculture
  14. 14. EFFECTS OF CLIMATE CHANGERISE IN SEA LEVELMelting ice sheets  Sea level rise
  15. 15. HEAVY RAINFALL ACROSS THE GLOBE
  16. 16. EXTREME DROUGHT
  17. 17. DECLINE IN CROP PRODUCTIVITY
  18. 18. ECOSYSTEMS ARE CHANGING
  19. 19. HURRICANES
  20. 20. RISE IN TEMPERATURE
  21. 21. CARBON DIOXIDE ACIDIFIES SEAWATER CO2 and carbonate (which plankton use to makeshells) combine in the ocean. The ocean is already more acidic than it was 50years ago.Source: Alfred-Wegener-InstituteCO2 CO2OceanAtmosphere“shelled-critters”
  22. 22. THANK YOU

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