ERMslides4
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1. The document discusses major climate events throughout history including the Dust Bowl of the 1930s and droughts in places like California, the Midwest, and along the Mississippi River. 2. It also covers evidence that an asteroid impact was the cause of the mass extinction that killed off the dinosaurs 65 million years ago, such as the iridium anomaly and shocked quartz found in the geologic record from that time. 3. The threat of future asteroid impacts is also discussed, along with efforts to detect potentially hazardous near-Earth asteroids and the possibility of deflecting them to avoid future impacts like the one that contributed to the KT extinction.
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ERMslides4
- 1. Climate Change Changes in water distribution
- 2. Changes in Weather Patterns
- 3. Extremes
- 4. Sahara
- 5. Dust Bowl 1934 - 35
- 6. Causes 7 years drought Overworked soil Extensive range use
- 7. Drought
- 8. Dust Bowl
- 9. Dust Bowl
- 10. Civilian Conservation Corps (CCC)
- 11. Shelter Belt
- 12. Dust Bowl Aftermath Emergency Farm Mortgage Act Frazier-Lemke Farm Bankruptcy Act Taylor Grazing Act Emergency Relief Appropriation Act Soil Conservation Service Shelter Belt Project
- 14. California
- 15. Oakland 1991
- 16. San Joaquin Delta 2006 (Maurer) Floods in winter Drought in summer
- 17. Fall 2007
- 18. Spring 2009 Fargo, ND & Moorhead, MN
- 19. Midwest 1988
- 20. Mississippi 1993
- 22. Moche
- 23. The Weather
- 24. $$ Disasters $$
- 25. !Kung San hxaro
- 28. Target: Earth
- 30. Evidence
- 31. Our Moon
- 32. Comet Shoemaker - Levy July 1994
- 35. The Solar System
- 36. Geocentrism
- 38. Asteroid Belt 10,000+ objects All < 500 km Irregular in shape
- 40. Earth crossers
- 41. Kuiper Belt
- 43. Oort Cloud
- 44. Comets
- 45. Omens
- 46. Mark Twain & Halley’s Comet “I came in with Halley's Comet... It is coming again ... and I expect to go out with it... The Almighty has said, no doubt: 'Now here are these two unaccountable freaks; they came in together, they must go out together.”
- 48. Cometary Orbits
- 49. Meteor Showers
- 50. Meteor Showers Lyrids Apr 24 Comet 15/hr 1861 Eta Aquarids May 4 Halley 20/hr Delta Aquarids July 30 ? 20/hr Perseids Aug 12 Comet 1862 60/hr Draconids Oct 9 Giacobini 15/hr Orionids Oct 21 Halley 20/hr Leonids Nov 17 Comet 1866 15/hr Geminids Dec 13 Phaeton 50/hr
- 52. Meteorites
- 53. October 2008 (2008 TC3) Entered Earth’s Atmosphere
- 54. 2008 TC3
- 55. Feb 2009
- 56. Tunguska 1908
- 57. Tunguska Force = 40 Megatons Pressure wave Lake Cheko?
- 58. Impact Craters
- 59. KT Event
- 60. Luis & Walter Alvarez
- 61. Iridium anomaly
- 62. Soot
- 63. Where did it Hit? <-250 km->
- 64. 65 million years ago
- 65. Shocked Quartz
- 67. Microspherules Microscopic glass droplets produced by rapid cooling
- 68. Approach Asteroid VS Comet
- 70. Impact Immediate: 10+ earthquake tsunami shockwave firestorm 200 trillion tons TNT
- 72. Long Term Changes 50 year cloud cover Loss of Photosynthesis Emergence of Mammals
- 73. Permian extinction 275 million years ago Large scale insect and marine event Pangaea
- 74. Methane Hydrate Release? CH4 trapped in water matrix (low temp, high pressure)
- 75. Lake Nyos 1986 Cameroon caldera CO2 release
- 76. Flaming Ice Exposure to Oxygen: flammability
- 77. Results
- 78. Mass Extinctions
- 80. Apophis
- 83. 1950DA 2880
- 85. B612 Foundation Locate & deflect Earth crossing asteroids Rusty Schweikart
- 86. Risk
- 88. Supernova Produces Pt-244 2 million years ago Fe-60 deposits
- 89. Megavolcanoes Deccan Traps 60-68 x 106 years ago
- 90. Shiva Crater
- 93. Parasite Infections roundworms Sandflies
- 94. Greatest Threat