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Atmospheric Chemistry and Physics An interactive open-access journal of the European Geosciences Union
doi:10.5194/acp-2016-865
© Author(s) 2016. This work is distributed
under the Creative Commons Attribution 3.0 License.
Research article
22 Nov 2016
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A revision of this discussion paper was accepted for the journal Atmospheric Chemistry and Physics (ACP) and is expected to appear here in due course.
First results of the Piton de la Fournaise STRAP 2015 experiment: multidisciplinary tracking of a volcanic gas and aerosol plume
Pierre Tulet1, Andréa Di Muro2, Aurélie Colomb3, Cyrielle Denjean4, Valentin Duflot1, Santiago Arellano5, Brice Foucart1,3, Jérome Brioude1, Karine Sellegri3, Aline Peltier2, Alessandro Aiuppa6,7, Christelle Barthe1, Chatrapatty Bhugwant8, Soline Bielli1, Patrice Boissier2, Guillaume Boudoire2, Thierry Bourrianne4, Christophe Brunet2, Fréderic Burnet4, Jean-Pierre Cammas1,9, Franck Gabarrot9, Bo Galle5, Gaetano Giudice7, Christian Guadagno8, Fréderic Jeamblu1, Philippe Kowalski2, Jimmy Leclair de Bellevue1, Nicolas Marquestaut9, Dominique Mékies1, Jean-Marc Metzger9, Joris Pianezze1, Thierry Portafaix1, Jean Sciare10, Arnaud Tournigand8, and Nicolas Villeneuve2 1LACy, Laboratoire de l’Atmosphère et des Cyclones (UMR8105 CNRS, Université de La Réunion, Météo-France), Saint-Denis de La Réunion, France
2OVPF, Institut de Physique du Globe de Paris (UMR7154, CNRS, Université Sorbonne Paris-Cité, Université Paris Diderot), Bourg-Murat, La Réunion, France
3LaMP, Laboratoire de Météorologie Physique (UMR6016, CNRS, Université Blaise Pascal), Clermont-Ferrand, France
4CNRM, Centre National de la Recherche Météorologique (UMR3589, CNRS, Météo-France), Toulouse, France
5DESS, Department of Earth and Space Sciences, Chalmers University of Technology, Gothenburg, Sweden
6Dipartimento DiSTeM, Universitá di Palermo, Italy
7INGV, Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Palermo, Italy
8ORA, Observatoire Réunionais de l’Air, Saint-Denis de La Réunion, France
9OSU-R, Observatoire des Sciences de l’Univers de la Réunion (UMS3365 CNRS, Université de La Réunion), Saint-Denis de La Réunion, France
10Energy, Environment, Water, Research Center, The Cyprus Institute, Nicosia, Cyprus
Abstract. The STRAP (Synergie Transdisciplinaire pour Répondre aux Aléas liés aux Panaches volcaniques) campaign was conducted in 2015 to investigate the volcanic plumes of Piton de La Fournaise (La Réunion, France). For the first time, measurements at the local (near the vent) and at the regional scales around the island were conducted. The STRAP 2015 campaign has become possible thanks to a strong cross-disciplinary collaboration between volcanologists and meteorologists. The main observations during four eruptive periods (85 days) are summarized. They include the estimates of SO2, CO2 and H2O emissions, the altitude of the plume at the vent and over different areas of La Réunion Island, the evolution of the SO2 concentration, the aerosol size distribution, and the aerosol extinction profile. A climatology of the volcanic plume dispersion is also reported. Simulations and measurements showed that the plume formed by weak eruption has a stronger interaction with the surface of the island. Strong SO2 and particles concentrations above 1000 ppb and 50 000 cm−3, respectively, are frequently measured over 20 km of distance from the Piton de la Fournaise. The measured aerosol size distribution shows the predominance of small particles in the volcanic plume. A particular emphasis is placed on the gas-particle conversion with several cases of strong nucleation of sulfuric acid observed within the plume and at the distal site of the Maïdo observatory. The STRAP 2015 campaign gave a unique set of multi-disciplinary data that can now be used by modellers to improve the numerical paramameterizations of the physical and chemical evolution of the volcanic plumes.

Citation: Tulet, P., Di Muro, A., Colomb, A., Denjean, C., Duflot, V., Arellano, S., Foucart, B., Brioude, J., Sellegri, K., Peltier, A., Aiuppa, A., Barthe, C., Bhugwant, C., Bielli, S., Boissier, P., Boudoire, G., Bourrianne, T., Brunet, C., Burnet, F., Cammas, J.-P., Gabarrot, F., Galle, B., Giudice, G., Guadagno, C., Jeamblu, F., Kowalski, P., Leclair de Bellevue, J., Marquestaut, N., Mékies, D., Metzger, J.-M., Pianezze, J., Portafaix, T., Sciare, J., Tournigand, A., and Villeneuve, N.: First results of the Piton de la Fournaise STRAP 2015 experiment: multidisciplinary tracking of a volcanic gas and aerosol plume, Atmos. Chem. Phys. Discuss., doi:10.5194/acp-2016-865, in review, 2016.
Pierre Tulet et al.
Pierre Tulet et al.

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Short summary
The STRAP campaign was conducted in 2015 to investigate the volcanic plumes of Piton de La Fournaise (La Réunion, France). For the first time, measurements at the local (near the vent) and at the regional scales around the island were conducted. The STRAP 2015 campaign gave a unique set of multi-disciplinary data that can now be used by modellers to improve the numerical paramameterizations of the physical and chemical evolution of the volcanic plumes.
The STRAP campaign was conducted in 2015 to investigate the volcanic plumes of Piton de La...
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