Tropospheric SO₂ Distributions during SCOUT-O3 Tropical – Main Features and Comparison to other Campaigns

Abstract

During SCOUT-O3 Tropical in November 2005 detailed vertical distributions of the SO2 mixing ratio in the troposphere were measured with the DLR research aircraft Falcon. 9 flights from Darwin, Australia and 14 transfer flights between Germany and Australia have been performed. The measurement technique employed was chemical ionization with ion trap massspectrometric detection. Observed vertical SO2 profiles will be presented and compared to SO2 observations in tropical South America during TROCCINOX 2005 and to observations in Europe during INTEX-B 2006. The origin of the air masses sampled will be discussed using back-trajectory analysis for selected cases