Paleoatmospheres and climates: Biogeochemical cycles of carbon on a hierarchy of time scales-J. Walker; Ice core records as a key to understanding the history of atmospheric trace gases-D. Raynaud; Ancient ice air content of the vostok ice core-I. Semiletov; Late jurassic paleoclimate of pangea based on results from general circulation model-G. Moore, D. Hayashida, C. Ross, and S. Jacobson; Distributions, reactions, sources, and sinks: The sensitivity of the global atmosphere to anthropogenic methane sources-N. Andronova and I. Karol; A time-dependent two dimensional-Model study of the trend in atmospheric methane-S. Fan, J. Rodriguez, M. Ko, and N. Sze; The influence of tropical biomass burning on climate and the atmospheric environment-M. Andreae; Long-term Effects of fossil-fuel-burning and deforestation on levels of atmospheric CO2-J. Kasting and J. Walker; Models of oceanic and terrestrial sinks of anthropogenic CO2: A review of the contemporary carbon cycle-I. Fung; Terrestrial systems Agriculture, the global nitrogen cycle, and trace gas flux-P. Vitousek and P. Matson; Sulfur gas emissions from African savanna-burning-B. Nguyen, N. Mihalopoulos, B. Bonsang, J. Putaud, and J. Lacaux; Methane production and uptake in some terrestrial ecosystems of the former USSR-N. Panikov, A. Belyaev, A. Semenov, and V. Zelenev; Emission of N-oxides from acid irrigated and limed soils of a coniferous forest in Bavaria-H. Papen, B. Hellmann, H. Papke, and H. Rennenberg; Production of methane and nitrous oxide by organic soils within a northern hardwood forest ecosystem-J.Yavitt and T.Fahey; Effect of nitrogen fertilizer and nitrification inhibitors on methane and nitrous o6xide fluxes in irrigated corn-K.Bronson; Nitric and nitrous oxide evolution from managed subtropical grassland-G.L. Hutchinson; Mechanisms controlling methane emission from wetland rice fields-R.Conrad; Mechanism of methane transport by rice plants-I.Nouchi and S.Mariko; Spatial and temporal variations of methane flux from a rice paddy field-K.Yagi and K.Minami; soil water content and the ratio of nitrous oxide to nitric oxide emitted from soil-E.Davidson; Respiration of cultivated histosols in field and laboratory measurements and the relationships between respiration and soil properties-T.Hokkanen and J.Silvola; Emission of biogenic sulfur gases from rice paddies in Japan-K.Minami, K.Kanda, and H.Tsuruta Emissions of ammonia, nitrous oxide, and methane from cattle Slurry-O.Oenema, G.Velthof, and D.Bussink; Sources and migration of methane-rich gas in sedimentary rocks of the Exmouth plateau: Northwest Australian continental margin-P.Meyers and L.Snowdon; Boreal Systems: Methane emissions from northern high-latitude wetlands-R.Harriss, K.Bartlett, S.Frolking,and P.Crill; Studies of permafrost and gas-hydrates as possible sources of atmospheric methane at high latitudes-K.