Chemistry Faculty Publications
 

Source Publication

Geophysical Research Letters

Document Type

Article

Publication Date

1-1-1997

Volume

24

Issue

1

First Page

65

Last Page

68

DOI

10.1029/96GL03724

Abstract

The generation of sulfuric acid aerosols in aircraft exhaust has emerged as a critical issue in determining the impact of supersonic aircraft on stratospheric ozone. It has long been held that the first step in the mechanism of aerosol formation is the oxidation of SO2 emitted from the engine by OH in the exhaust plume. We report in situ measurements of OH and HO2 in the exhaust plumes of a supersonic (Air France Concorde) and a subsonic (NASA ER-2) aircraft in the lower stratosphere. These measurements imply that reactions with OH are responsible for oxidizing only a small fraction of SO2 (2%), and thus cannot explain the large number of particles observed in the exhaust wake of the Concorde.

Comments

This article was originally published in Geophysical Research Letters.

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