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Global Climate Change DigestArchives of the
Global Climate Change Digest

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



Item #d93mar23

"Measurements of Jet Aircraft Emissions at Cruise Altitude. I: The Odd-Nitrogen Gases NO, NO2, HNO2 and HNO3," F. Arnold (M. Planck Inst. Kernphysik, 6900 Heidelberg, Ger.), J. Scheid et al., Geophys. Res. Lett., 12(4), 2421-2424, Dec. 24, 1992.

Used a novel aircraft-borne automatic mass spectrometer to make the first measurements of these constituents in a fresh airliner exhaust trail. Most of the emitted odd nitrogen remained in the reactive forms NO and NO2, which affect ozone.

Item #d93mar24

"Short-Term Atmospheric Effects of High-Altitude Aircraft Emissions," M.Y. Danilin (Inst. Meteorol., Univ. Cologne, W-5000 Cologne 41, Ger.), B.C. Kruger, A. Ebel, Annales Geophysicae-Atmos., Hydros. & Space Sci., 10, 904-911, Dec. 1992.

Studied short-term (seconds to hours) plume chemistry with a 1-D model as a basis for assessing large-scale impacts of emissions. Scenarios corresponded to modern aircraft at 10 km, and hypersonic aircraft with H-2 combustion engines around 26 km.

Item #d93mar25

"Two-Dimensional Assessment of the Impact of Aircraft Sulphur Emissions on the Stratospheric Sulphate Aerosol Layer," S. Bekki (Dept. Chem., Univ. Cambridge, Cambridge CB2 1EW, UK), J.A. Pyle, J. Geophys. Res., 97(D14), 15,839-15,847, Oct. 20, 1992.

Investigates the 60% increase in large aerosol particles observed over the 1979-1990 period with a 2-D sulfate aerosol model. Results suggest that the rise in air traffic is insufficient to account for this apparent trend.

Item #d93mar26

"Black Carbon (Soot) Aerosol in the Lower Stratosphere and Upper Troposphere," R.F. Puschel (NASA-Ames, Moffet Field CA 94035), D.F. Blake et al., Geophys. Res. Lett., 19(16), 1659-1662, Aug. 21, 1992.

Impactor samples of black carbon aerosol (BCA) are presented and compared with estimated loadings from current air traffic. Planned supersonic commercial aircraft could double the stratospheric BCA concentration and double the BCA surface area available for heterogeneous chemistry. (A correction to this article appears ibid., p. 2105, Oct. 23, 1992.)

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