![[object Object],WHAT IS GLOBAL WARMING?](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
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Global Warming
- 1. GLOBAL WARMING A WARNING FOR LIFE
- 8. Atmospheric CO 2 (parts per million)
- 9. 800 600 400 200 0 CO 2 (ppmv) Thousands of Years Before Present 240 300 270 210 180 Petit et al., 1999; Siegenthaler et al., 2005; EPICA Community members, 2004 Temp. Proxy Present CO 2 concentration (386 ppmv) CO 2 concentration after 50 years of unrestricted fossil fuel burning (600 ppmv)
- 10. 270 290 360 370 380 Carbon Dioxide Concentration (ppmv) 280 300 310 320 330 340 350 1750 1800 1850 1900 1950 2000 Mauna Loa (1958 - present) Siple Station (1750 - ) Reconstructed CO 2 concentrations
- 11. Climate fluctuates naturally Glacier ice Sea ice 18,000 years ago Present
- 12. Global mean temperature Global average sea level Northern hemisphere snow cover Observations of recent climate change
- 13. Global Instrumental Temperature Record 10 warmest years
- 17. Larsen B, Mar-02 Antarctic Sea Ice Break-ups
- 18. Larsen B, Mar-02
- 19. Larsen B, Mar-02
- 20. Wilkins, Mar-08
- 23. Arctic Sea Ice Melting 1979
- 24. Arctic Sea Ice Melting 2005
- 25. Arctic Sea Ice Melting 2007
- 26. Ice Extent (10 6 km 2 ) Arctic sea ice extent 2007
- 27. Arctic is warming faster 1860 1880 -2.0 Difference (°C) from 1961-1990 mean All land area 1900 1920 1940 1960 1980 2000 -1.0 0.0 1.0 2.0 Arctic (land north of 65°N)
- 28. Carroll Glacier 1906 2004 1980
- 30. Muir and Riggs Glaciers
- 32. 1993 2000
- 33. Qori Kalis 1978 2002 1928 2004 Patagonia
- 38. West Antarctic Ice Sheet
- 39. Greenland satellite melt record 1992 2005
- 40. 1980 0.5 0.8 Melt Extent (10 6 km 2 ) 0.6 0.7 1985 1990 1995 2000 2005 0.4 0.2 0.3 Greenland Melt Extent (April - September 25) 1992 2002 2005
- 42. Sea-level rise
- 43. Coastal population Coastal migration
- 44. Sea level 18,000 years ago (-70m) Florida’s coast if Greenland OR the West Antarctic Ice Sheet Melted 7m rise in sea level 5m rise in sea level 8m rise in sea level
- 46. Habitat loss Mass extinction
- 47. Coral bleaching GREAT LOSS TO AQUATIC LIFE CHANGE IN LIFE FORMS
- 48. Methane hydrates Melting of Methane Hydrate crystals could lead to run-away greenhouse
- 49. Projected risks due to climate change
- 50. What can you do?
- 52. Plant trees
- 53. Drive less
- 54. Shop smart
- 56. Be informed
- 57. Unplug
- 59. Don’t buy ocean-front property
Editor's Notes
- Photo: remember when 2 outlets per wall was more than enough??
- Here we see the typical saw-tooth pattern of temperature which marks the short interglacial (warm) periods followed by longer glacial periods. In every case, CO2 records and temperature records correlate. What will happen in our newly CO2-enriched climate, however, is anybody’s guess. Scientists have used computer models to show that temperatures will likely increase between 3 and 11 °F over the next 100 years. Following every peak in CO2, there is an immediate drop. This happened 10,000 years ago, but slowed once humans began agricultural activity. Now, the level of CO2 is skyrocketing and is expected to exceed 600 ppm by 2050!
- Air bubbles trapped in ice cores allow us to extend this CO2 record back about a million years.
- 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.
- Albedo feedback is apparent when comparing NH snow cover from January 2004, for example, to July 2004 (next slide). Caption: This image shows the Earth in January 2004 from the Blue Marble: Next Generation. Credit: NASA Earth Observatory . See: http://www.nasa.gov/vision/earth/features/bmng_gallery_3.html And: http://earthobservatory.nasa.gov/Newsroom/BlueMarble/BlueMarble_monthlies.html
- As glaciers melt in a warmer climate, sea levels rise.
- Satellite images reveal a widening melt area in early summer each year.
- 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.