Global warming
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This ppt is presented by Mr. VINAY KUMAR SHAH (10BEC0347) of VIT University, Vellore (TN) in his very first year of B.Tech ECE under the course Environmental studies.
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Global warming
- 4. *It is simply defined as the increase in the tempreture of earth’s atmosphere by green house gases
- 7. Causes of global warming: . Deforestation Rapid industrialization Population explosion Increase in GHG concentration Main cause: CARBON DIOXIDE
- 8. Greenhouse Gasses Carbon dioxide Nitrogen oxide CFCs(Chloro fluro Carbons Hydro carbons Methane Water vapour
- 9. Atmospheric CO2 (parts per million)
- 10. Climate fluctuates naturally 18,000 years ago Present Glacier ice Sea ice
- 13. Predicted changes of human-caused warming For over 30 years, scientists have predicted increased greenhouse gasses will cause unnatural changes By 2000: T Antarctic sea ice and ice shelf break-ups T Antarctic Peninsula warming T Arctic sea ice melting T Faster Arctic warming (11°F) T Melting of small glaciers and ice caps T Sea level rise T And more…
- 14. Antarctic Sea Ice Break-ups Larsen B, Mar-02 14
- 15. Larsen B, Mar-02 15
- 16. Larsen B, Mar-02 16
- 17. Wilkins, Mar-08
- 20. Arctic Sea Ice Melting 1979
- 21. Arctic Sea Ice Melting 2005
- 22. Arctic Sea Ice Melting 2007
- 23. Ice Extent (106 km2) Arctic sea ice extent 2007
- 24. Arctic is warming faster 2.0 All land area Difference (°C) from 1961-1990 mean Arctic (land north of 65°N) 1.0 0.0 -1.0 -2.0 24 1860 1880 1900 1920 1940 1960 1980 2000
- 25. Carroll Glacier 1980 1906 2004 25
- 26. McCarty Glacier, Alaska 26
- 27. Muir and Riggs Glaciers 27
- 28. Kilimanjaro 1970 2005 28
- 29. 1993 2000
- 30. Qori Kalis 1978 2002 Patagonia 1928 2004 30
- 31. Who cares? Glaciers and ice caps gone by 2100 Ice sheets melting too! Over 40% of world’s water supply Direct rise in sea level Reflect sunlight
- 32. Sea-level rise Temperatures and sea levels will continue to rise for centuries. Arctic sea ice will disappear in the next few decades Hot extremes, heat waves, and heavy rains will continue to become more frequent
- 33. West Antarctic Ice Sheet
- 34. Greenland satellite melt record 1992 2005 34
- 35. Greenland Melt Extent (April - September 25) 0.8 2002 2005 0.7 Melt Extent (106 km2) 0.6 0.5 0.4 0.3 0.2 1992 1980 1985 1990 1995 2000 2005 35
- 36. Sea-level rise
- 38. Sea level 18,000 5m rise in sea years ago (-70m) level 7m riseGreenland OR the West Antarctic Ice Sheet Melted in sea Florida’s coast if in sea 8m rise level level
- 39. Additional consequences Fastest extinction rate in 65 M years (1000x normal rate) Increased disease Air-borne (e.g. asthma) Insect-borne (e.g. malaria) More extreme weather Droughts Flooding Heat-waves Storms
- 40. Habitat loss Mass extinction 40
- 41. GREAT LOSS TO AQUATIC LIFE Coral bleaching 41 CHANGE IN LIFE FORMS
- 44. Plant trees
- 45. Drive less
- 47. Unplug
Hinweis der Redaktion
- Decades ago, climate scientists told of the predicted patterns of UNNATURAL climate change caused by increasing greenhouse gas concentrations. They nailed the patterns. What they predicted is exactly what we are seeing.
- Images of Kilimanjaro taken from the shuttle in 1993 and in 2000.
- As glaciers melt in a warmer climate, sea levels rise.
- Here’s what FL’s coast looked like.
- Species of land animals are disappearing faster now than any time since the dinosaurs were wiped out 65 million years ago. From polar bears in the Arctic no longer having sea ice for hunting, mating, and migration, to frog in the tropics, we are losing species fast, and humans are almost completely to blame. Increased winds are carrying dust farther, worsening conditions like allergies and asthma, while longer breeding seasons for insects are helping spread insect-borne disease like malaria.