Accession Number:

ADA139407

Title:

Cruise Aircraft Effects 1981 Status.

Descriptive Note:

Final rept.,

Corporate Author:

INSTITUTE FOR DEFENSE ANALYSES ALEXANDRIA VA

Personal Author(s):

Report Date:

1982-01-01

Pagination or Media Count:

75.0

Abstract:

Recent post-1978 developments are discussed in the longstanding question of possible environmental effects of aircraft emissions at cruise altitudes. Computer models of atmospheric ozone, using recently accepted changes in certain key reaction rates now again indicate that NOx from SSTs at 17-20 km will reduce the ozone column, as was the case about 1974. The same chemistry changes have materially lessened the computed effects of halocarbons. No recent results on effects on NOx from subsonic aircraft which fly at altitudes of 6-14 km are available, but minor ozone column enhancement is still expected. Changes are being considered in mathematical representations of the transport process in one-dimensional 1-D parameterizations, which may reduce the spread of effects computed by different groups. A coherent picture may be developing on aircraft effects which will require further study to establish and to quantify. Other issues effects of climate, contrails are also discussed.

Subject Categories:

  • Transport Aircraft
  • Atmospheric Physics
  • Air Pollution and Control

Distribution Statement:

APPROVED FOR PUBLIC RELEASE