Global cooling using aerosol

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Global cooling using aerosol

  1. 1. Global Cooling usingAerosol<br />By: Wei He<br />
  2. 2. Global Warming<br />Global Warming: the gradual increase in the average global temperature.<br />
  3. 3. Global Warming vs. Cooling<br />From IPCC (Intergovernmental Panel on Climate Change) Report<br />
  4. 4. Aerosol<br />Aerosol: suspension of tiny particles <br />in the air<br />
  5. 5. Aerosol: Direct Effect and Indirect Effect<br />Direct Effect: aerosol in Earth’s stratosphere reflects sunlight away from Earth. <br /><ul><li> Indirect Effect: aerosol in Earth’s troposphere allows cloud formation. Clouds then cool the earth by reflecting sunlight back into space.</li></li></ul><li>Scientific Experiments<br />Large Volcanic eruptions can send particles at high as the stratosphere, and the particles can spread around the world<br />1991 Pinatubo Eruption <br />
  6. 6. Experimental Results<br />1982 El ChichonEruption: 7 million metric tons of SO2 caused global cooling of 0.3°C.<br />1991 Pinatubo Eruption: 20 million metric tons of SO2 caused global cooling of 0.5°C<br />1815 TamboraEruption: Largest eruption in recorded history released unknown amount of SO2. Global Cooling of about 3°C.<br />Data from U.S Geological Survey<br />
  7. 7. Methods of Climate Engineering<br />Send aerosol into earth’s atmosphere using <br />balloons, artilleries, or airplanes. <br />

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