THE IMPACT OF WORLD'S TRANSPORT AIRCRAFT FLIGHTS ON THE OZONOSPHERE AND CLIMATE

I. L. Karol'

The results of studies of current and future expected effects of aircraft engine exhausts on the atmospheric gas and aerosol composition and Earth's climate are presented and reviewed. An evaluation is made of the burnt fuel along the main flight corridors and of exhaust emissions in the 1990s, as well as of their present and expected rapid increase until 2050. The main ways of emission effects are indicated and analyzed for the current subsonic and developing supersonic transport aviation. These are changes in the content of radiatively active gases in the upper troposphere and lower stratosphere and the effect of condensation trails on the upper-air clouds. Model estimates of the current low levels of these effects are presented along with possible causes of their poor detection. The technological and organizational measures for lowering atmospheric effects of aircraft emissions are also indicated.

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