Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Transport, Radiative, and Dynamical Effects of the Antarctic Ozone Hole: A GFDL 'SKYHI' Model Experiment.
Author Mahlman, J. D. ; Pinto, J. P. ; Umscheid, L. J. ;
CORP Author Environmental Protection Agency, Research Triangle Park, NC. Atmospheric Research and Exposure Assessment Lab. ;National Oceanic and Atmospheric Administration, Princeton, NJ. Geophysical Fluid Dynamics Lab.
Publisher 15 Feb 94
Year Published 1994
Report Number EPA/600/J-94/308;
Stock Number PB94-192754
Additional Subjects Ozone depletion ; Atmospheric models ; Antarctic regions ; Simulation ; Radiative heat transfer ; Atmospheric temperature ; Atmospheric chemistry ; Annual variations ; Southern hemisphere ; Atmospheric circulation ; Meteorological charts ; Reprints ;
Library Call Number Additional Info Location Last
NTIS  PB94-192754 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 11/11/1994
Collation 24p
The Geophysical Fluid Dynamics Laboratory 'SKYHI' general circulation model has been used to simulate the effect of the Antarctic 'ozone hole' phenomenon on the radiative and dynamical environment of the lower stratosphere. Both the polar ozone destruction and photochemical restoration chemistries are calculated by parameterized simplifications of the still uncertain, more complete chemical processes. The modeled total column ozone depletions are near 25% in spring over Antarctica, with 1% depletion reaching equatorial latitudes by the end of the 4 1/2 year model experiment. In the lower stratosphere, ozone reductions of 5% reach to the equator. Large coolings of about 8 C are simulated in the lower stratosphere over Antarctica in late spring, while a general cooling of about 1-1.5 C is present throughout the Southern Hemisphere lower stratosphere. The model atmosphere experiences a long-term positive temperature-chemical feedback because significant ozone reductions carry over into the next winter. The overall temperature response to the reduced ozone is essentially radiative in character. However, substantial dynamical changes are induced by the ozone hole effect. The Antarctic middle stratosphere in late spring warms by about 6 C over Antarctica and the lower mid-latitude stratosphere warms by approximately one degree. These warming spots are produced mainly by an increased residual circulation intensity.