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A Model of the Effect of Ozone Depletion on Lower-Stratospheric StructureWe have run two twenty-year integrations of a global circulation model using 1978-1980 and 1998-2000 monthly mean ozone climatologies. The ozone climatology is used solely in the radiation scheme of the model. Several key differences between the model runs will be presented. The temperature and potential vorticity (PV) structure of the lower stratosphere, particularly in the Southern Hemisphere, is significantly changed using the 1998-2000 ozone climatology. In the Southern Hemisphere summer, the lapse rate and PV-defined polar tropopauses are both at altitudes on the order of several hundred meters greater than the 1978-1980 climatological run. The 380 K potential temperature surf= is likewise at a greater altitude. The mass of the extratropical lowermost stratosphere (between the tropopause and 380 K surface) remains unchanged. The altitude differences are not observed in the Northern Hemisphere. The different ozone fields do not produce a significant change in the annual extratropical stratosphere-troposphere exchange of mass although slight variations in the spatial distribution of the exchange exist. We are also investigating a delay in the breakup of the Southern Hemisphere polar vortex due to the differing ozone climatologies.
Document ID
20050147499
Acquisition Source
Goddard Space Flight Center
Document Type
Conference Paper
Authors
Olsen, Mark A.
Stolarski, Richard S.
Gupta, Mohan L.
Nielsen, J. Eric
Pawson, Steven
Date Acquired
August 23, 2013
Publication Date
January 1, 2005
Subject Category
Meteorology And Climatology
Meeting Information
Meeting: AMS Middle Atmosphere Meeting
Location: Cambridge, MA
Country: United States
Start Date: June 13, 2005
End Date: June 17, 2005
Sponsors: American Meteorological Society
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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