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Global Climate I


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Global Climate I

  1. 1. Global Climate I
  2. 2. Goal 1 Explain the global greenhouse effect
  3. 3. <ul><li>Greenhouse effect is in </li></ul><ul><li>NO WAY </li></ul><ul><li>related to the </li></ul><ul><li>Hole in the ozone layer !! </li></ul>
  4. 4. <ul><li>Not related to </li></ul><ul><li>The </li></ul><ul><li>Hole in the ozone layer !! </li></ul>
  5. 5. <ul><li>Has nothing to do with </li></ul><ul><li>The </li></ul><ul><li>Hole in the ozone layer !! </li></ul>
  6. 6. <ul><li>Greenhouse effect </li></ul><ul><ul><li>Naturally occurring </li></ul></ul><ul><ul><li>Result of atmospheric gases </li></ul></ul><ul><ul><li>Not in dispute, it is a Scientific Law </li></ul></ul>
  7. 7. <ul><li>Earth’s average temperature </li></ul><ul><li>without atmosphere </li></ul><ul><li>-18°C -0.4 </li></ul><ul><li>Earth’s average temperature </li></ul><ul><li>with atmosphere </li></ul><ul><li>15 °C 59°F </li></ul>
  8. 8. <ul><li>Sun sends energy as visible light and near-visible infrared light waves </li></ul><ul><ul><li>Small wavelengths that can sneak past atmospheric molecules to reach Earth’s surface </li></ul></ul>
  9. 9. <ul><li>Earth’s surface absorbs the energy sent by the sun and changes it to infrared energy (heat energy) </li></ul>
  10. 10. <ul><li>The surface radiates infrared energy waves </li></ul><ul><ul><li>Longer wavelengths are absorbed by the atmospheric molecules and reemitted towards the surface (no escape) </li></ul></ul>
  11. 11. Image credit: PD-gov NASA
  12. 12. Image credit: Robert A Rohde on wikipedia commons
  13. 13. <ul><li>Important gases in the atmosphere that act as greenhouse gases </li></ul><ul><ul><li>H 2 O (water vapor) </li></ul></ul><ul><ul><li>CO 2 </li></ul></ul><ul><ul><li>CH 4 (methane) </li></ul></ul><ul><ul><li>N 2 O </li></ul></ul>
  14. 14. Goal 2 Describe the human impact on the carbon cycle
  15. 15. <ul><li>Carbon cycle </li></ul><ul><ul><li>The cycle through which carbon is exchanged between the biosphere, geosphere, hydrosphere, and atmosphere </li></ul></ul>
  16. 16. Image credit: PD: gov NASA
  17. 17. <ul><li>Carbon pools: storage pools of carbon </li></ul><ul><ul><li>Sink if more carbon enters pool </li></ul></ul><ul><ul><ul><li>Plant growth </li></ul></ul></ul><ul><ul><ul><ul><li>Land </li></ul></ul></ul></ul><ul><ul><ul><ul><li>Oceans </li></ul></ul></ul></ul>
  18. 18. <ul><ul><li>Source if more carbon leaves pool </li></ul></ul><ul><ul><ul><li>Plant death </li></ul></ul></ul><ul><ul><ul><ul><li>Burning </li></ul></ul></ul></ul><ul><ul><ul><ul><li>Decay </li></ul></ul></ul></ul><ul><ul><ul><li>Fossil fuel combustion* </li></ul></ul></ul>
  19. 19. <ul><li>Human impact on carbon cycle </li></ul><ul><ul><li>Fossil fuels contain carbon </li></ul></ul><ul><ul><li>Fossil fuels in nature lock carbon away from carbon cycle </li></ul></ul><ul><ul><li>Human activity has unlocked this carbon </li></ul></ul><ul><ul><li>Added carbon to the carbon cycle </li></ul></ul>