February 28, 2007
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FROM VOLUME 6, NUMBER 3, MARCH 1993
ANTHROPOGENIC EMISSIONS AND CONTROL: AIRCRAFT EMISSIONS
"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.
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.
"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.
"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.
"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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