Berlin 2012 – wissenschaftliches Programm

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UP: Fachverband Umweltphysik

UP 14: Atmosphere 2

UP 14.6: Hauptvortrag

Donnerstag, 29. März 2012, 15:45–16:15, HFT-FT 131

Detection of gaseous sulphur and halogen species in the outgassing plume from volcano Mt. Etna — •Christiane Voigt^1,2, Philipp Jeßberger^1,2, Domink Schäuble¹, Tina Jurkat¹, Robert Baumann¹, Guiseppe Salerno³, and Nicole Brobowski⁴ — ¹DLR, Institut für Physik der Atmosphäre, Oberpfaffenhofen, Germany — ²Johannes Gutenberg-Universität, Institut für Physik der Atmosphäre, Mainz, Germany — ³Istituto Nazionale di Geofisica e Vulcanologia, Osservatorio Etneo, Italy — ⁴Ruprecht-Karls-Universität, Institut für Umweltphysik, Heidelberg, Germany

Volcanoes affect climate in multiple ways. Degassing volcanoes represent a strong local source of sulphur and halogen species into the troposphere, and the formation and deposition of acids may cause major environmental hazards.

Here we present new in-situ observations in the outgassing plume from the Sicilian volcano Mt. Etna. The volcanic plume was detected with two Atmospheric chemical Ionization Mass Spectrometers (AIMS) onboard the DLR research aircraft Falcon on 29 and 30 September 2011 during the CONCERT2011 campaign. High mixing ratios of SO2, HNO3 as well as chlorine and bromine species were measured in the ageing volcanic plume. In addition, SO2 and BrO fluxes were detected at the crater rim with different DOAS instruments. We link those observations using HYSPLIT trajectory calculations and investigate the complex chemical evolution of the Etna plume from its origin to about 12 hours plume age.