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Global Climate Change Digest

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



Item #d93mar40

Two items from J. Geophys. Res., 97(D13), Sep. 20, 1992:

"Nitrous Oxide from Coal-Fired Power Plants: Experiments in the Plumes," M.A.K. Khalil (Dept. Environ. Sci., Oregon Grad. Inst., Beaverton OR 97006), R.A. Rasmussen, 14,645-14,649. Measurements show there is very little excess N2O within 100 m of the stack, and provide evidence that N2O is formed further downwind. Estimates global direct emissions from power plants to be 0.05 tg/yr.

"The Global Sources of Nitrous Oxide," M.A.K. Khalil (addr. immed. above), R.A. Rasmussen, 14,651-14,660. Uses atmospheric and ice core data to show that present global anthropogenic emissions are 7 ± 1 tg/yr; natural sources are about 15 tg/yr. N2O started increasing rapidly only during the last century, and may be increasing faster in recent years than during the 1970s.

Item #d93mar41

"Effects of Liming and Nitrogen Fertilization on Emissions of CO2 and N2O from a Temperate Forest," R. Brumme (Inst. Soil Sci. & Plant Nutr., Buesgenweg 2, W-3400, Göttingen, Ger.), F. Beese, J. Geophys. Res., 97(D12), 12,851-12,858, Aug. 20, 1992.

Flux measurements from experimental plots in a 145-year-old beech forest show that liming drastically reduced the N2O emission and increased CO2 emission; fertilization increased N2O.

Item #d93mar42

"Emissions of Nitrous Oxide from Combustion Sources," A.N. Hayhurst (Dept. Chem. Eng., Univ. Cambridge, Cambridge CB2 3RA, UK), A.D. Lawrence, Progress Energy & Combus. Sci., 18(6), 529-552, 1992. An extensive review with over 100 references, emphasizing fluidized bed combustion of coal.

Item #d93mar43

"Nitrous Oxide Emissions in Fluidized-Bed Combustion: Fundamental Chemistry and Combustion Testing," M.D. Mann (Energy Res. Ctr., Univ. N. Dakota, Grand Forks ND 58202), M.E. Collings, P.E. Botros, ibid., 18(5), 447-461.

Analyzes factors influencing N2O emissions such as SOx/NOx control, combustion temperature, and fuel type (wood, peat, lignite, subbituminous and bituminous coal, petroleum coke). Discusses possible abatement strategies.

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