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Polar Ozone: Stratosphere-Troposphere Coupling and recent Changes

This presentation explores the coupling between the stratosphere and troposphere, emphasizing the impact of recent changes in polar ozone levels. It covers key topics such as radiation effects, dynamics of the Brewer-Dobson circulation, and chemical composition variations within the stratosphere. Additionally, it discusses the implications of the Antarctic ozone hole and trends in polar ozone, exacerbated by greenhouse gas increases and changes in atmospheric dynamics. Understanding these interactions is crucial for addressing climate impacts and ensuring the health of our atmosphere.

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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

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