First results of the Piton de la Fournaise STRAP 2015 experiment: Multidisciplinary tracking of a volcanic gas and aerosol plume

Alessandro Aiuppa, Thierry Portafaix, Andréa Di Muro, Philippe Kowalski, Jean-Marc Metzger, Gaetano Giudice, Jérome Brioude, Jean Sciare, Jimmy Leclair De Bellevue, Christelle Barthe, Santiago Arellano, Nicolas Villeneuve, Valentin Duflot, Patrice Boissier, Franck Gabarrot, Bo Galle, Pierre Tulet, Christophe Brunet, Cyrielle Denjean, Joris PianezzeNicolas Marquestaut, Dominique Mékies, Arnaud Tournigand, Guillaume Boudoire, Fréderic Jeamblu, Christian Guadagno, Brice Foucart, Christophe Brunet, Christophe Brunet, Thierry Bourrianne, Chatrapatty Bhugwant, Aurélie Colomb, Alessandro Aiuppa, Jean-Pierre Cammas, Fréderic Burnet, Aline Peltier, Christophe Brunet, Soline Bielli, Karine Sellegri

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15 Citations (Scopus)


The STRAP (Synergie Transdisciplinaire pour Répondre aux Aléas liés aux Panaches volcaniques) campaign was conducted over the entire year of 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 were conducted around the island. The STRAP 2015 campaign has become possible thanks to strong cross-disciplinary collaboration between volcanologists and meteorologists. The main observations during four eruptive periods (85 days) are summarised. 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 show that the plumes formed by weak eruptions have a stronger interaction with the surface of the island. Strong SO2 mixing ratio and particle concentrations above 1000Äâ¬ppb and 50Äâ¬000Äâ¬cmÄ'3 respectively are frequently measured over a distance of 20Äâ¬km from Piton de la Fournaise. The measured aerosol size distribution shows the predominance of small particles in the volcanic plume. Several cases of strong nucleation of sulfuric acid have been observed within the plume and at the distal site of the Maïdo observatory. The STRAP 2015 campaign provides a unique set of multi-disciplinary data that can now be used by modellers to improve the numerical parameterisations of the physical and chemical evolution of the volcanic plumes.
Original languageEnglish
Pages (from-to)5355-5378
Number of pages24
JournalAtmospheric Chemistry and Physics
Publication statusPublished - 2017

All Science Journal Classification (ASJC) codes

  • Atmospheric Science


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