Global warming

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Global warming (2011)

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Global warming

  1. 1. GLOBAL WARMING P SE E B RE NT D Y: SUPTA SARKAR CHSCAU-75
  2. 2. CONTE NT: • INTRODUCTION • FACTS OF GLOBAL WARMING • GREEN HOUSES GASES • GREEN HOUSE EFFECT • CAUSES OF GOBAL WARMING • CONSEQUENSES Contd.
  3. 3. • Global coolinG • SoME PoSiTiVE conSEQUEncES • EFFEcTS -WorldWidE -india • SolUTionS • conclUSion
  4. 4. INTRODUCTION • The earth’s temperature rises. • S.Arrhenius, 1896
  5. 5. FACTS OF GLOBAL WARMING • The Earth's surface temperature is at an average of 59°F(‘09). • IPCC:By the year 2100, the average change could range from 2.5°F to about 10°F. • It is occurring since the ice ages. • Effecting began with the Industrial Revolution.
  6. 6. • 75% of the increase in the carbon dioxide content is caused due to fossil fuels. • NOAA: 1998 to 2007 ranks among the top 25 warmest years • 2000-2009 hottest decade on record. • 2005-warmest year [NASA & NCDC] Contd..
  7. 7. • India is 5th major emitter (env. Minister report,2009). • It's too late to stop global warming, but we can limit it. “Save earth, Go GREEN”
  8. 8. GREEN HOUSE GASES • The major natural greenhouse gases: -water vapour causing about 36-70% of greenhouse effect -carbon dioxide causing 9-26%; -methane causing 4-9%, & -nitrious oxide, which causes 3-7%. -CFC , which causes 2-3%. the Contd.
  9. 9. • Kyoto protocol came into action
  10. 10. CONTRIBUTION TO CO 2 EMISSION PER YEAR COUNTRY China United States Russia India Japan % PER YEAR 21.5% 20.2% 5.5% 5.3% 4.6% Source: Science Reporter (Dec’10)
  11. 11. RESEARCH STUDY: GEOPHYSICAL RESEARCH  IPCC, [24th Mar.’ 2011]  Climate model [Dec.’ 2010] :  Reducing CO2 concentrations could help drought caused by global warming. Source: Down To Earth (April 16-30, 2011)
  12. 12.   Source: IPCC Assessment (2009) http://en.wikipedia.org/wiki/greenhousegas
  13. 13. GREENHOUSE EFFECT • The temperature rises because the sun’s heat and light is trapped in the earth’s atmosphere. • Example of a closed car in a parking area on a hot summer day.
  14. 14. CAUSES • Cutting down of trees: • Industries: • Transportation:
  15. 15. • Electrical pollution • Household sources: • Garbage: (landfills.)
  16. 16. CONSEQUENCES Glaciers and Sea Levels • Melting Glaciers & ice caps • Sea-Level Rise
  17. 17. HealtH • Deadly Heat Waves • Bad Air, Allergy and Asthma • Infectious Disease and Food and Waterborne Illness Outbreaks
  18. 18. Wildlife • Melting the habitats. • Extinction of species
  19. 19. Weather Patterns • More Powerful and Dangerous Hurricanes • Drought and Wild fire • Intense Rainstorms
  20. 20.  Conjecture during 1970s  In 2009 the concept gained recognition based on Global Climate model 1999 -Aerosol -Orbital forcing AE ROSOL : -reflecting solar radiation 
  21. 21. Orbital forcing: -changes in the tilt of axis & in orbit shape   IPCC: Global cooling heading way by next 30 years
  22. 22. Some positive consequences • Lower mortality in the temperate zones. • Wood production, • Agricultural yields in temperate zones, • Increased water resources
  23. 23. EFFECTS: WARNING SIGNS TODAY GLACIERS & SEA LEVEL: • NASA’ 09: melting ice caps at the rate of 9% per decade. • Arctic ice thickness has decreased 40% since the 1960s. • IPCC : sea levels could rise 10 to 23 inches by 2100. • Melting Greenland’s glacier [ Nature Geoscience research: March’2011]
  24. 24. HEALTH • In 2003, heat waves in Europe killed 70,000 lives. • France, 15,000 people died of soaring temperatures (104° F) • In July 2006, North America, 140 people died due to severe heat wave. • Ground-level ozone smog production caused asthma.
  25. 25. WEATHER • IPCC’ 07: 50 million people could become "environmental refugees" by 2020. • NOAA: 2006 had its wettest summer on record.
  26. 26. WILDLIFE • IPCC’10: About 20-30% of species are at a risk of extinction if temperature increases by 2.74.5° F more.
  27. 27. EFFECTS OF GLOBAL WARMING ON INDIA • Submerged several low-lying islands in the Sundarban. • Retreat Himalayan glaciers. • 1998 coral bleaching in Lakshadweep and the Andaman. • Over flow from Bangladesh cause flooding problem.
  28. 28. • IPCC: About 7 million people are to be displaced of parts of Mumbai and Chennai. • Meghalaya: Cherrapunji and Mawsynram, the wettest places in the world due to their high rainfall.
  29. 29. SOLUTION • Replacing with a compact fluorescent Light(CFL) bulb (saves 300pound CO2). • Cleaning or replacing filters (350 pound CO2). • Covering pots while cooking (2.5% GHG).
  30. 30. • Planting a tree. • Protecting & conserving forest worldwide. • Recycling at home (saves 2400 pound of CO2).
  31. 31. • Driving carefully [ 1 L petrol = 1 kg H2O & 2.17 kg CO2 ] • Choosing efficient mode of transport ---
  32. 32. CONCLUSION
  33. 33. “E ART on F H ire...J hands to save our oin earth.. H to prevent GL AL W elp OB ARM ING”

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