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Global Climate Change DigestArchives of the
Global Climate Change Digest

A Guide to Information on Greenhouse Gases and Ozone Depletion
Published July 1988 through June 1999



Item #d89jan24

"Overview of the Polar Ozone Issue," S. Solomon (NOAA, Boulder CO 80303), M.R. Schoeberl, Geophys. Res. Lett., 15(8), 845-846, Aug. 1988.

Special Antarctic expeditions in 1986 and 1987 have shown conclusively that chlorine chemistry is the primary cause of the ozone hole. Further questions regarding detailed mechanisms, processes, and implications are addressed in this special issue. In 1989, additional results from the 1987 Airborne Antarctic Ozone Experiment (AAOE) will be published in a special issue of this journal.

This issue contains the results of laboratory studies that confirm and quantify the importance of the nitric acid trihydrate in forming polar stratospheric clouds, and other studies that demonstrate the extreme rapidity of heterogeneous chemical reactions involving both chlorine and nitrogen species on ice surfaces. In the view of the authors, editors of this section, one of the most significant papers contains the results of laboratory studies suggesting these surface reactions are not limited to ice clouds, but can also take place on liquid sulfuric acid aerosols present at lower latitudes.

Several papers describe the seasonal nature of the ozone depletion and the vertical structure of those changes as observed both by balloon-borne and satellite instruments. Both techniques reveal strongly localized depletion near the 10-24 km level, and show that ozone abundances at some levels suffer decreases of more than 90%.

Other studies confirm the possibility that ozone depletion might produce substantial decreases in temperature. Radiative transfer studies show that such coupling has profound implications for the depth and extent of the ozone hole. Other temperature variations appear to be correlated with the equatorial quasi-biennial oscillation and changes in solar activity.

Several papers include the effects of polar stratospheric clouds on photochemistry, and subsequent ozone depletion is modeled explicitly. The role of subpolar upper tropospheric weather systems in determining the climatology of the lower stratosphere is also studied. Finally, observations of low NO2 concentrations in north polar regions may well be linked to ozone depletion, as this was observed in the Antarctic.

"Heterogeneous Interactions of Chlorine Nitrate, Hydrogen Chloride, and Nitric Acid with Sulfuric Acid Surfaces at Stratospheric Temperatures," M.A. Tolbert, M.J. Rossi, D.M. Golden, 847-850.

"Heterogeneous Reactions of N2O5 with H2O and HCl on Ice Surfaces: Implications for Antarctic Ozone Depletion," M.-T. Leu, 851-854.

"Laboratory Studies of the Nitric Acid Trihydrate: Implications for the South Polar Stratosphere," D. Hanson, K. Mauersberger, 855-858.

"Balloon Borne Antarctic Frost Point Measurements and Their Impact on Polar Stratospheric Cloud Theories," J.M. Rosen, D.J. Hofmann et al., 859-862.

"Dehydration Mechanism in the Antarctic Stratosphere During Winter," V. Ramaswamy, 863-866.

"Lidar Observations of Arctic Polar Stratospheric Clouds, 1988: Signature of Small, Solid Particles Above the Frost Point," L.R. Poole, M.T. Osborn, W.H. Hunt, 867-870.

"Influences of Polar Stratospheric Clouds on the Depletion of Antarctic Ozone," R.J. Salawitch, S.C. Wofsy, M.B. McElroy, 871-874.

"Two-Dimensional Modelling of the Antarctic Lower Stratosphere," M.P. Chipperfield, J.A. Pyle, 875-878.

"Polar Atmospheric Circulation and Chemistry of Recent (1957-1983) South Polar Precipitation," M. Legrand, S. Kirchner, 879-882.

"Thermochemical Stabilities and Vibrational Spectra of Isomers of the Chlorine Oxide Dimer," M.P. McGrath, K.C. Clemitshaw et al., 883-886.

"Kinetics and Product Studies of the BrO + ClO Reaction: Implications for Antarctic Chemistry," S.P. Sander, R.R. Friedl, 887-890.

"O3 and NO2 Ground-Based Measurements by Visible Spectrometry During Arctic Winter and Spring 1988," J.P. Pommereau, F. Goutail, 891-894.

"Stratospheric O3 and NO2 Observations at the Southern Polar Circle in Summer and Fall 1988," J.P. Pommereau, F. Goutail, 895-897.

"Stratospheric NO2 Column Measurements from Three Antarctic Sites," J.G. Keys, P.V. Johnston, 898-900.

"Comparative Morphology of the Vertical Ozone Profile in the Antarctic Spring," B.G. Gardiner, 901-904.

"Total Ozone by Lunar Dobson Observation at Syowa, Antarctica," S. Chubachi, R. Kajiwara, 905-906.

"Antarctic Measurements of Ozone by SAGE II in the Spring of 1985, 1986, and 1987," M.P. McCormick, J.C. Larsen, 907-910.

"The Anomalous Circulation in the Southern Hemisphere Stratosphere During Spring 1987," W.J. Randel, 911-914.

"Relation of Antarctic 100 mb Temperature and Total Ozone to Equatorial QBO, Equatorial SST, and Sunspot Number, 1958-87," J.K. Angell, 915-918.

"Radiative Aspects of the Antarctic Ozone Hole in 1985," H. Akiyoshi, M. Fujiwara, M. Uryu, 919-922.

"The Morphology and Meteorology of Southern Hemisphere Spring Total Ozone Mini-holes," P.A. Newman, L.R. Lait, M.R. Schoeberl, 923-926.

"500 mb Winter Variability over the Antarctic (Palmer) Peninsula," J. Nogues-Paegle, S.C. Stucki, 927-930.

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