The NATO ARW in Irkutsk was an excellent occasion for the coming together of Eastern and Western scientists who are involved in tropospheric science; the workshop has greatly contributed to the scientific and social understanding among the participants from the many different countries. Many new personal contacts were made which will help to strengthen future collaborations. In particular, the Lake Baikal area and the Limnological Institute offer splendid opportunities for environmental research which, in part, is already on going. For most participants it was the first time to see the impressive nature of the Lake Baikal region. Hopefully, there will be a chance for a follow-up event in Siberia where researchers from the East and West can again meet and engage in fruitful scientific dialogue. The book contains extended abstracts of the lectures and the poster presentations presented at the NATO ARW "Global Atmospheric Change and its Impact on Regional Air Quality" Irkutsk, Lake Baikal, Russian Federation, August 21-27, 2001. The ARW was composed of 22 oral presentations by key lecturers and 6 additional shorter oral presentations from participants. In a special poster session the 36 poster contributions were presented and discussed. Unfortunately not all contributors submitted extended abstracts, however, to compensate two contributions have been added from 2 participants who were originally invited but were unable to attend.

Inhalt
European Research on Atmospheric Global Change: EU Supported Projects and Future Planning.- Probing Chemical Mechanisms in Clean and Polluted Environments through Field Measurement / Model Comparisons.- Formation and Cycling of Aerosols in the Global Troposphere.- Active and Passive Sensing of Aerosol from Space.- Global Self-Regulation of Ozone in the Earth Atmosphere.- Tropospheric Multiphase Chemistry in Field, Modelling and Laboratory Studies.- Stable Carbon Isotope Ratio Measurements: A New Tool to Understand Atmospheric Processing of Volatile Organic Compounds.- Air Pollution Monitoring in Romania.- Modelling of Ozone and Secondary Organic Aerosol across Europe: Results from the EMEP Models.- Emission of Atmospheric Pollutants from Aero Engines.- The Impact of Halogen Chemistry on the Oxidation Capacity of the Troposphere.- Recent Developments in Peroxy Radical Chemistry.- Atmospheric Chemistry of Oxygenated VOCs.- Experimental and Theoretical Study of the Atmospheric Degradation of Aldehydes.- The Photochemical Degradation of Chloral and Oxalyl Chloride.- Fluorinated Radical Reactions of Atmospheric Importance.- Heterogeneous Reactions Affecting Chlorine Activation in the Troposphere.- Photochemical Processes in the Atmosphere.- Atmosphere-Related Aspects of the Aqueous Phase Oxidation of Sulphur Dioxide.- Soot Particles from Different Combustion Sources: Composition, Surface groups. Oxidation under Atmospheric Conditions.- Investigation of Particle Formation in the Photo-oxidation of Dimethyl Sulphide.- Model Study of the Photooxidation of CH3SO2SCH3 at Atmospheric Pressure: Thermal Decomposition of the CH3SO2 Radical.- Atmospheric Oxidation of Selected Primary Alcohols.- Interaction of Ozone with Sodium Chloride a Possible Additional Source of Chlorine inthe Atmosphere.- Transition Metal Ions in The Processes Of Acid Rain Formation.- The Role of HCl and HBr in Heterogeneous Processes of Stratospheric Ozone Decomposition.- Comparison of the NO3 Heterogeneous Uptake on Dry and Humidified NaX (X=Cl, Br) Salts.- Air Pollution in Turkey.- Background State and Trends of Sulfur Dioxide and Sulfate Aerosols in the Atmosphere over Russia.- Changes in Land Use and Land Cover in Arid Southem Mediterranean on the Long Term Using Remote Sensing and GIS A Case Study of Northwest Egypt.- Investigation of PAH in Atmospheric Aerosols and Precipitation's of East Siberia.- Regional Atmospheric Changes Caused by Natural and Antropogeneous Factors.- Environmental Problems connected with Air Pollution in the industrial Regions of Ukraine.- Comparison of Experimental and Calculated Data on Ion Composition of Precipitation in the South of East Siberia.- Monitoring of the Spatial and Temporal Variation of the Particle Size Distribution and Chemical Composition of the Atmospheric Aerosol in Siberia.- Model Accumulation Mode of Atmospheric Aerosol Including Photochemical Aerosol Formation, Coagulation, Dynamics of the Atmospheric Boundary Layer and Relative Humidity.- Volatile Organic Compounds (VOCs) in the Atmospheric Air of Moscow: The impact of Industry and Transport.- Transcontinental Observations of the Surface Ozone and Nitrogen Oxide Concentrations by Using the Carriage-Laboratory.- Evaluation of On-Road Vehicle Emissions: The Lundby Tunnel Study in Gothenburg, Sweden.- Season Variation of Near Ground Impurities of O3 and CO in East Siberia.- Roadside Measurements of Traffic Emissions from Motorway BAB 656 in Heidelberg with Emphasis on Particles.- The Effect of Distant Sources of Ozone and PMioS on Boundary Layer Air Quality inCornwall a rural area in the UK.- Chemical Composition of Atmospheric Fall-Out as an Indicator of the Impact of Local Aerosol Emission Sources on Global Air Quality Change.- Influence of the Antropogenic Emissions and Atmospheric Chemical Processes on Climate in XXI Century.- Digital Photogrammetric Method for Ecological Monitoring.- Hydrogen Technology: H2 Storage and Release.- Effects from Industrial Emissions on the Lake Baikal Region Forests.- Assessment of Siberian Forest Ecosystem Stability Against the Acidification.- Air Pollution in the Adirondack Park; Public-Private Efforts to Reduce Acidity in Soils, Water.