Ice core studies of global biogeochemical cycles [proceedings of the NATO Advanced Research Workshop "Ice Score Studies of Global Biogeochemical Cycles", held in Annecy, France, March 26 - 31, 1993

The analysis of polar ice cores has proven to be very instructive about past environmental conditions on the time scale of several climatic cycles, and recent drilling operations have provided information of great value for global change issues. The book presents the most recent data extracted from Greenland ice cores and surface experiments and compares them with former Antarctic results. It contains background articles, original contributions and group reports of interest to scientists, climatologists, atmospheric chemists, and glaciologists involved in global change research. Front Matter....Pages I-X Arctic Aerosols: Composition, Sources and Transport....Pages 1-22 Nature and Origin of Antarctic Submicron Aerosols....Pages 23-38 Cloud Processes in the Troposphere....Pages 39-63 Ocean/Atmosphere Cycling of Dimethylsulfide....Pages 65-89 Sulphur-Derived Species in Polar Ice: A Review....Pages 91-119 The Contributions of Wet, Fog, and Dry Deposition to the Summer SO 4 2− Flux at Summit, Greenland....Pages 121-138 Biological Sulfur, Clouds and Climate....Pages 139-165 The Chemistry and Climatic Role of Biogenic Sulfur: Group Discussion....Pages 167-173 1250 Years of Global Volcanism as Revealed by Central Greenland Ice Cores....Pages 175-194 Nitrate in Polar Ice....Pages 195-224 A Preliminary Study of the Air-Snow Relationship for Nitric Acid in Greenland....Pages 225-240 Nitric Acid in Firn: Discussion....Pages 241-245 Group Meeting on Nitrate Sources in Antarctica and Greenland....Pages 247-248 H 2 O 2 and HCHO in Polar Snow and Their Relation to Atmospheric Chemistry....Pages 249-264 Photochemical Modeling of Chemical Cycles: Issues Related to the Interpretation of Ice Core Data....Pages 265-297 Impact of Biomass Burning on the Atmosphere....Pages 299-311 Combustion Carbonaceous Aerosols in the Atmosphere: Implications for Ice Core Studies....Pages 313-346 Boreal Biomass Burning Over the Last 80 Years Recorded in a Summit-Greenland Ice Core....Pages 347-360 Preliminary Investigations of Post Depositional Effects on HCl, HNO 3 , and Organic Acids in Polar Firn Layers....Pages 361-381 A New Approach to Glaciochemical Time Series Analysis....Pages 383-400 Mercury in Ancient Ice and Recent Snow from the Antarctic....Pages 401-415 Plutonium from Nagasaki A-Bomb as a Possible Tracer for Global Transport, Using Existing Initial Conditions and Ice Cores....Pages 417-425 Current Status of Atmospheric Studies at Summit (Greenland) and Implications for Future Research....Pages 427-458 Back Matter....Pages 459-478 Proceedings of the NATO Advanced Research Workshop ""Ice Score Studies of Global Biogeochemical Cycles"", held in Annecy, France, March 26 - 31, 1993