Imaging DOAS for volcanological applications

• Published in: Bulletin of Volcanology
• Main Authors: Louban, I., Bobrowski, N., Rouwet, D., Inguaggiato, S., Platt, U.
• Other Authors: Louban, I.; Institute for Environmental Physics, University of Heidelberg, Im Neuenheimer Feld 229, 69120 Heidelberg, Germany, Bobrowski, N.; Institute for Environmental Physics, University of Heidelberg, Im Neuenheimer Feld 229, 69120 Heidelberg, Germany, Rouwet, D.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Palermo, Palermo, Italia, Inguaggiato, S.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Palermo, Palermo, Italia, Platt, U.; Institute for Environmental Physics, University of Heidelberg, Im Neuenheimer Feld 229, 69120 Heidelberg, Germany, Institute for Environmental Physics, University of Heidelberg, Im Neuenheimer Feld 229, 69120 Heidelberg, Germany, Istituto Nazionale di Geofisica e Vulcanologia, Sezione Palermo, Palermo, Italia
• Format: Article in Journal/Newspaper
• Language: English
• Published: Sringer 2009
• Subjects: DOAS; Imaging DOAS; Volcanic plume; BrO; SO2; 01. Atmosphere::01.01. Atmosphere::01.01.07. Volcanic effects; 01. Atmosphere::01.01. Atmosphere::01.01.08. Instruments and techniques; 04. Solid Earth::04.08. Volcanology::04.08.01. Gases; 04. Solid Earth::04.08. Volcanology::04.08.06. Volcano monitoring; 04. Solid Earth::04.08. Volcanology::04.08.07. Instruments and techniques; Arctic
• Online Access: http://hdl.handle.net/2122/5692; https://doi.org/10.1007/s00445-008-0262-6

The simultaneous quantitative determination of two-dimensional bromine monoxide (BrO) and sulphur dioxide (SO2) distributions in volcanic gas plumes is described. Measurements at the fumarolic field on the island Vulcano (autumn 2004) and in the plume of Mt. Etna volcano (spring 2005) were carried out with an Imaging DOAS instrument. The SO2 fluxes of several fumaroles were estimated from two-dimensional distributions of SO2. Additionally, the first two-dimensional distributions of BrO within a volcanic plume were successfully retrieved. Slant column densities of up to 2.6×1014 molecules per square centimetre were detected in the plume of Mt. Etna. The investigation of the BrO/SO2 ratio, calculated from the two-dimensional distributions of SO2 and BrO, shows an increase from the centre to the edge of the volcanic plume. These results have significance for the involvement of ozone during BrO formation processes in volcanic emissions. Published 753-765 2.4. TTC - Laboratori di geochimica dei fluidi JCR Journal reserved