Gas emission strength and evolution of the molar ratio of BrO/SO2 in the plume of Nyiragongo in comparison to Etna

• Published in: Applied Microbiology and Biotechnology
• Main Authors: Bobrowski, N., von Glasow, R., Giuffrida, G. B., Tedesco, D., Aiuppa, A., Yalire, M., Arellano, S., Johansson, M., Galle, B.
• Other Authors: Bobrowski, N.; Institut für Umweltphysik, University of Heidelberg, Heidelberg, Germany, von Glasow, R.; 2Centre for Ocean and Atmospheric Sciences, School of Environmental Sciences, University of East Anglia, Norwich, United Kingdom, Giuffrida, G. B.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Palermo, Palermo, Italia, Tedesco, D.; Department of Environmental Sciences, Second University of Napoli, Caserta, Italy, Aiuppa, A.; Dipartimento Scienze della Terra e del Mare, University of Palermo, Palermo, Italy, Yalire, M.; Observatoire Volcanologique de Goma, Goma, Democratic Republic of Congo, Arellano, S.; Department of Earth and Space Sciences, Chalmers University of Technology, Göteborg, Sweden, Johansson, M.; Department of Earth and Space Sciences, Chalmers University of Technology, Göteborg, Sweden, Galle, B.; Department of Earth and Space Sciences, Chalmers University of Technology, Göteborg, Sweden, Institut für Umweltphysik, University of Heidelberg, Heidelberg, Germany, 2Centre for Ocean and Atmospheric Sciences, School of Environmental Sciences, University of East Anglia, Norwich, United Kingdom, Istituto Nazionale di Geofisica e Vulcanologia, Sezione Palermo, Palermo, Italia, Department of Environmental Sciences, Second University of Napoli, Caserta, Italy, Dipartimento Scienze della Terra e del Mare, University of Palermo, Palermo, Italy, Observatoire Volcanologique de Goma, Goma, Democratic Republic of Congo, Department of Earth and Space Sciences, Chalmers University of Technology, Göteborg, Sweden
• Format: Article in Journal/Newspaper
• Language: English
• Published: American Geophysical Union 2015
• Subjects: Intraplate volcano Nyiragongo is bromine rich although chlorine poor; BrO/Br in volcanic plumes depends on initial plume composition; Determination of Nyiragongo chlorine; bromine; sulfur emission strength; 04. Solid Earth::04.08. Volcanology::04.08.01. Gases; Lava Lake; Arctic
• Online Access: http://hdl.handle.net/2122/10296; https://doi.org/10.1002/2013JD021069

Airborne and ground-based differential optical absorption spectroscopy observations have been carried out at the volcano Nyiragongo (Democratic Republic of Congo) tomeasure SO2 and bromine monoxide (BrO) in the plume inMarch 2004 and June 2007, respectively. Additionally filter pack andmulticomponent gas analyzer system (Multi-GAS)measurements were carried out in June 2007. Ourmeasurements provide valuable information on the chemical composition of the volcanic plume emitted fromthe lava lake of Nyiragongo. The main interest of this study has been to investigate for the first time the bromine emission flux of Nyiragongo (a rift volcano) and the BrO formation in its volcanic plume. Measurement data and results from a numerical model of the evolution of BrO in Nyiragongo volcanic plume are compared with earlier studies of the volcanic plume of Etna (Italy). Even though the bromine flux from Nyiragongo (2.6 t/d) is slightly greater than that from Etna (1.9 t/d), the BrO/SO2 ratio (maximum 7 × 10 5) is smaller than in the plume of Etna (maximum 2.1 × 10 4). A one-dimensional photochemical model to investigate halogen chemistry in the volcanic plumes of Etna and Nyiragongo was initialized using data from Multi-GAS and filter pack measurements. Model runs showed that the differences in the composition of volcanic volatiles led to a smaller fraction of total bromine being present as BrO in the Nyiragongo plume and to a smaller BrO/SO2 ratio. Published 277-291 4V. Vulcani e ambiente JCR Journal restricted