ERMslides4

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Class presentation slides for the fourth quarter of ERM 150, Spring Semester 2009

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ERMslides4

  1. 1. Climate Change Changes in water distribution
  2. 2. Changes in Weather Patterns
  3. 3. Extremes
  4. 4. Sahara
  5. 5. Dust Bowl 1934 - 35
  6. 6. Causes 7 years drought Overworked soil Extensive range use
  7. 7. Drought
  8. 8. Dust Bowl
  9. 9. Dust Bowl
  10. 10. Civilian Conservation Corps (CCC)
  11. 11. Shelter Belt
  12. 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
  13. 13. Consequences of Drought
  14. 14. California
  15. 15. Oakland 1991
  16. 16. San Joaquin Delta 2006 (Maurer) Floods in winter Drought in summer
  17. 17. Fall 2007
  18. 18. Spring 2009 Fargo, ND & Moorhead, MN
  19. 19. Midwest 1988
  20. 20. Mississippi 1993
  21. 21. Katrina 2005 Erosion Runoff Mold Tree loss
  22. 22. Moche
  23. 23. The Weather
  24. 24. $$ Disasters $$
  25. 25. !Kung San hxaro
  26. 26. Ancient Floods 5600 BC
  27. 27. Ancient Floods Vishnu Gilgamesh
  28. 28. Target: Earth
  29. 29. Extraterrestrial Impact
  30. 30. Evidence
  31. 31. Our Moon
  32. 32. Comet Shoemaker - Levy  July 1994
  33. 33. Jupiter’s Moon Ganymede
  34. 34. Terrestrial Impact Sites
  35. 35. The Solar System
  36. 36. Geocentrism
  37. 37. Piazzi 1801 Ceres Vesta Pallas Juno
  38. 38. Asteroid Belt 10,000+ objects All < 500 km Irregular in shape
  39. 39. Asteroids Fragments OR Remnants of early solar System?
  40. 40. Earth crossers
  41. 41. Kuiper Belt
  42. 42. Kuiper Belt Objects
  43. 43. Oort Cloud
  44. 44. Comets
  45. 45. Omens
  46. 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.”
  47. 47. Comet Composition
  48. 48. Cometary Orbits
  49. 49. Meteor Showers
  50. 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
  51. 51. Meteor Shower 1833
  52. 52. Meteorites
  53. 53. October 2008 (2008 TC3) Entered Earth’s Atmosphere
  54. 54. 2008 TC3
  55. 55. Feb 2009
  56. 56. Tunguska 1908
  57. 57. Tunguska Force = 40 Megatons Pressure wave Lake Cheko?
  58. 58. Impact Craters
  59. 59. KT Event
  60. 60. Luis & Walter Alvarez
  61. 61. Iridium anomaly
  62. 62. Soot
  63. 63. Where did it Hit? <-250 km->
  64. 64. 65 million years ago
  65. 65. Shocked Quartz
  66. 66. Chondrules Carbon + silicates Meteoric
  67. 67. Microspherules Microscopic glass droplets produced by rapid cooling
  68. 68. Approach Asteroid VS Comet
  69. 69. Mass Extinction Event
  70. 70. Impact Immediate: 10+ earthquake tsunami shockwave firestorm 200 trillion tons TNT
  71. 71. Nuclear Winter  http://www.atomicarchive.com/Movies/Movie6.shtml
  72. 72. Long Term Changes 50 year cloud cover Loss of Photosynthesis Emergence of Mammals
  73. 73. Permian extinction 275 million years ago Large scale insect and marine event Pangaea
  74. 74. Methane Hydrate Release? CH4 trapped in water matrix (low temp, high pressure)
  75. 75. Lake Nyos 1986 Cameroon caldera CO2 release
  76. 76. Flaming Ice Exposure to Oxygen: flammability
  77. 77. Results
  78. 78. Mass Extinctions
  79. 79. The Next Collision?
  80. 80. Apophis
  81. 81. Apophis Approach: 2029 Return Apr 13, 2036
  82. 82. Impact Trajectory
  83. 83. 1950DA 2880
  84. 84. B612 Foundation Locate & deflect Earth crossing asteroids Rusty Schweikart
  85. 85. Risk
  86. 86. Alternative Explanations Supernova? Megavolcano(es) Marine Regression Pathogens
  87. 87. Supernova Produces Pt-244 2 million years ago Fe-60 deposits
  88. 88. Megavolcanoes Deccan Traps 60-68 x 106 years ago
  89. 89. Shiva Crater
  90. 90. Marine Regression
  91. 91. Pathogens T. rex coprolites
  92. 92. Parasite Infections roundworms Sandflies
  93. 93. Greatest Threat
  94. 94. Triumph of Survival

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