Post on 14-Jan-2016
description
Polar Ozone: Stratosphere-Troposphere Coupling and recent
Changes
16.01.08
Proseminar Presentation Techniques Axel Behrendt
Contents
Part A: Stratosphere-Troposphere Coupling
Part B: Recent Polar Ozone Changes
1. Radiation2. Dynamics3. Composition of the Stratosphere4. Impact on Climate
1. Antarctic Ozone Hole 20022. Polar Ozone Trends
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1. Radiation
Part A: Stratosphere-Troposphere CouplingPart A: Stratosphere-Troposphere Coupling
Increase of Greenhouse Gases
2/13
http:// www.usgcrp.gov
• Gas Phase Reactions
slow down
• More PSCs
1. Radiation
http://www.solcomhouse.com
11-Year Sun-Cycle
3/13Part A: Stratosphere-Troposphere CouplingPart A: Stratosphere-Troposphere Coupling
Meridional temperature gradient is modified
Brewer Dobson Circu- lation is modified
2. Dynamics
http://www.atmosphere.mpg.de
Stratosphere-Troposphere-ExchangeBrewer Dobson Circulation
http://www.ccpo.odu.edu
4/13Part A: Stratosphere-Troposphere CouplingPart A: Stratosphere-Troposphere Coupling
2. DynamicsQuasi Biennial Oscillation
http://www.nwra.com
5/13Part A: Stratosphere-Troposphere CouplingPart A: Stratosphere-Troposphere Coupling
2. Dynamics
Chemical Composition of the Troposphere:
• Long lived species: CH4, N2O, CFCs, COS, …
• Short lived species: SO2 DMS
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3. Composition of the Stratosphere
Stratospheric Aerosols (SO2, COS from volcanoes)
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Stratospheric Water Vapor
From: WMO-Report 2007
4. Impact on Climate
500 hPa Geopotential Height [m]
Surface Temp. [K] and Winds
8/13Part A: Stratosphere-Troposphere CouplingPart A: Stratosphere-Troposphere Coupling
From: WMO-Report 2007
Part B:
Recent Polar Ozone Changes
9/13
Part B: Recent Polar Ozone ChangesPart B: Recent Polar Ozone Changes
1. The Antarctic Ozone Hole 2002
http://www.nasa.gov
10/13
From: WMO-Report 2007
2. Polar Ozone Trends
Antarctic:
http://www.classzone.com
http://www.physicalgeography.net
11/13Part B: Recent Polar Ozone ChangesPart B: Recent Polar Ozone Changes
2. Polar Ozone Trends
12/13Part B: Recent Polar Ozone ChangesPart B: Recent Polar Ozone Changes
http://www.acia.uaf.edu/
Thanks for your attention !!
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