Potential impact on stratospheric ozone due to emission of hydrocarbons from high-altitude aircraft

Xuexi Tie

doi:10.3402/tellusb.v46i4.15803

Potential impact on stratospheric ozone due to emission of hydrocarbons from high-altitude aircraft

Tellus B: Chemical and Physical Meteorology

Volume 46 (1994): Issue 4

By: Xuexi Tie

Open Access

|Jan 1994

Abstract

A two-dimensional chemical/dynamical model is used to assess the sensitivities on the stratospheric ozone due to emission of hydrocarbons (HCs) from various high-altitude aircraft (including proposed further High Speed Civil Transports, HSCT) under different partitioning of HCs (HCs as CH₄ or HCs as C₂H₆) and different sulfate aerosol loadings (background aerosol or large volcanic aerosol). The model calculation suggests that the emission of HCs increases stratospheric ozone, but the magnitudes of increase vary with different situations. The further proposed HSCT has relatively small emission of HCs. Thus, the impact on stratospheric ozone due to HC emission is small (less than 0.1% increase in total ozone). In some type of aircraft engines which were proposed by the Climate Impact Assessment Program (CIAP) in 1975, the HC emission is about 20 X larger than the HSCT emission; moreover, these aircraft could produce a important increase on stratospheric ozone, especially after a large volcanic eruption, such as Mt. Pinatubo (Philippines in June, 1991).

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