Includes bibliographical references.

V. 1. Current status of kinetics and photochemical data base for trace gas families involved in ozone chemistry -- Special issues in stratospheric chemistry -- Halocarbons -- Nitrous oxide -- Oxides of nitrogen -- Methane -- Carbon monoxide -- Carbon dioxide -- Source gases for stratospheric sulfate aerosols -- Volcanic injections of chlorine into the stratosphere -- Secular trends of trace gases from polar ice cores -- Photochemistry of the background troposphere -- Chemistry of ozone formation in the polluted troposphere -- Heterogeneous chemistry -- Surface exchange and vertical redistribution -- Research needs -- Exchange in the tropics -- Extratropical exchange -- Large scale numerical modelling of stratosphere-troposphere exchange (V. 1. continued) Climatological means and variability of the middle atmosphere -- Theory of circulation of the middle atmosphere -- Middle atmosphere general circulation models -- Observations of transport processes -- Theory of transport processes -- Future needs -- Solar radiation and its absorption in the stratosphere and mesosphere -- Terrestrial radiation -- Conclusion and future research needs. V. 2. Ozone reference profiles -- Comparison of calculated and observed ozone profiles -- Ozone and temperature correlations -- Ozone and solar variability -- Ozone and solar proton events -- Ozone variations associated with El Chichon/El Nino -- Hydroxl measurements -- Hydroperoxyl measurements -- Hydrogen peroxide measurements -- Water measurements -- Methane measurements -- Non-satellite data -- Satellite data -- Odd nitrogen modelling -- Chlorine monoxide -- Atomic chlorine -- Chlorine nitrate -- Hydrogen chloride and hydrogen fluoride -- Stratospheric distribution of halocarbons -- Total chlorine -- Conclusions -- Future research needs. V. 3. On the comparison of models and data -- 1-D models: formulation and interpretation -- recent developments -- 1-D models: intercomparison of NOy differences -- Two-dimensional models: some theoretical ideas -- Current models -- A comparison of two-dimensional models -- Chemistry in three-dimensional models -- On the use of models for assessment studies -- Results of model calculations -- Discussion of current model predictions and assessment of recognized uncertainties -- Ozone trends -- Temperature trends -- Nature of radiative forcing -- Theory and models -- Effects on atmospheric and surface temperatures -- Transient climatic effects of increasing atmospheric CO2 -- Trace gas effects on observed and future climate trends -- Scientific challenges for the future (V. 3. continued) Overview of atmospheric spectroscopy -- Quantitative high-resolution atmospheric spectroscopy -- Laboratory spectroscopy by spectral analysis and predictions -- Use of spectroscopic data to derive atmospheric composition -- Examples of spectroscopic data requirements for space-based remote sensing of the atmosphere -- Database assessment -- Ozone -- Water vapor -- Other species -- Data -- Regular components: annual, semi-annual and quasi-biennial waves -- Interannual variability -- Monthly means charts of total ozone, and of ozone mixing ratios and temperatures at selected pressure levels.