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Polar Ozone: Stratosphere-Troposphere Coupling and recent Changes

Polar Ozone: Stratosphere-Troposphere Coupling and recent Changes

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Polar Ozone: Stratosphere-Troposphere Coupling and recent Changes

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Presentation Transcript

  1. Polar Ozone: Stratosphere-Troposphere Coupling and recent Changes Proseminar Presentation Techniques Axel Behrendt 16.01.08

  2. Contents Part A: Stratosphere-Troposphere Coupling Part B: Recent Polar Ozone Changes • Radiation • Dynamics • Composition of the Stratosphere • Impact on Climate • Antarctic Ozone Hole 2002 • Polar Ozone Trends 1/13

  3. Gas Phase Reactions • slow down • More PSCs 1. Radiation Increase of Greenhouse Gases http:// www.usgcrp.gov Part A: Stratosphere-Troposphere Coupling 2/13

  4. Meridional temperature gradient is modified Brewer Dobson Circu- lation is modified 1. Radiation 11-Year Sun-Cycle http://www.solcomhouse.com Part A: Stratosphere-Troposphere Coupling 3/13

  5. Brewer Dobson Circulation Stratosphere-Troposphere-Exchange http://www.ccpo.odu.edu http://www.atmosphere.mpg.de 2. Dynamics Part A: Stratosphere-Troposphere Coupling 4/13

  6. 2. Dynamics Quasi Biennial Oscillation http://www.nwra.com Part A: Stratosphere-Troposphere Coupling 5/13

  7. 2. Dynamics Chemical Composition of the Troposphere: • Long lived species: CH4, N2O, CFCs, COS, … • Short lived species: SO2 DMS Part A: Stratosphere-Troposphere Coupling 6/13

  8. Stratospheric Water Vapor From: WMO-Report 2007 3. Composition of the Stratosphere Stratospheric Aerosols (SO2, COS from volcanoes) Part A: Stratosphere-Troposphere Coupling 7/13

  9. 4. Impact on Climate 500 hPa Geopotential Height [m] Surface Temp. [K] and Winds From: WMO-Report 2007 Part A: Stratosphere-Troposphere Coupling 8/13

  10. Part B: Recent Polar Ozone Changes 9/13

  11. 1. The Antarctic Ozone Hole 2002 http://www.nasa.gov From: WMO-Report 2007 Part B: Recent Polar Ozone Changes 10/13

  12. 2. Polar Ozone Trends Antarctic: http://www.classzone.com http://www.physicalgeography.net Part B: Recent Polar Ozone Changes 11/13

  13. 2. Polar Ozone Trends http://www.acia.uaf.edu/ Part B: Recent Polar Ozone Changes 12/13

  14. Thanks for your attention !! 13/13