München 2004 – scientific programme
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UP: Umweltphysik
UP 13: Poster: Aerosol und Mensch
UP 13.1: Poster
Tuesday, March 23, 2004, 14:00–16:00, Schellingstr. 3
Mass Spectrometric Aerosol Composition Measurements in the Free Troposphere — •Johannes Schneider1, Joachim Curtius2, Frank Drewnick1, Silke Henseler1, Nele Hock1, Silke Weimer1, and Stephan Borrmann1,2 — 1Abt. Wolkenphysik und -chemie, Max-Planck-Institut für Chemie, Mainz — 2Institut für Physik der Atmosphäre, Johannes Gutenberg-Universität Mainz
Aircraft based measurements of the chemical composition of aerosol particles in the mid-latitude tropopause region have been performed using the Aerodyne Aerosol Mass Spectrometer (AMS). The AMS detects particles in the size range between 50 and 1500 nm and measures quantitatively the mass concentrations and size distributions of ammonium, nitrate, sulfate, and organics. The aircraft measurements were part of the research project PAZI (Particles From Aircraft: Impact on Cirrus Clouds and Climate), which is funded by the German HGF (Hermann von Helmholtz-Gemeinschaft Deutscher Forschungszentren) research organization. The main objective of this project is to investigate the relationship between aircraft exhaust particles and the formation of cirrus clouds. The measurements took place in Southern Germany using the twin-jet research aircraft No-dqFalconNo-dq of the DLR (Deutsches Zentrum fuer Luft- und Raumfahrt). The measurement flights included sampling in aged aircraft exhaust as well as background flights in regions with little air traffic, at altitudes between 8000 and 12000 m, representing the mid-latitude upper troposphere. Here we present first results like size distributions and vertical profiles.