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.