Cruise Aircraft Effects 1981 Status.
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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1982
- Accession Number
- ADA139407
Entities
People
- R. C. Oliver
Organizations
- Institute for Defense Analyses