First results of the Piton de la Fournaise STRAP 2015 experiment: multidisciplinary tracking of a volcanic gas and aerosol plume
Journal article, 2017
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.
Author
Pierre Tulet
Université de La Réunion
A. Di Muro
Institut de Physique du Globe de Paris
Aurélie Colomb
Blaise Pascal University, Clermont-Ferrand II
Cyrielle Denjean
CNRM Centre National de Recherches Meteorologiques
Valentin Duflot
Université de La Réunion
Santiago Arellano
Chalmers, Earth and Space Sciences, Optical Remote Sensing
Brice Foucart
Université de La Réunion
Blaise Pascal University, Clermont-Ferrand II
J. Brioude
Université de La Réunion
Karine Sellegri
Blaise Pascal University, Clermont-Ferrand II
A. Peltier
Institut de Physique du Globe de Paris
Alessandro Aiuppa
University of Palermo
National Institute of Geophysics and Volcanology
Christelle Barthe
Université de La Réunion
Chatrapatty Bhugwant
ORA
Soline Bielli
Université de La Réunion
Patrice Boissier
Institut de Physique du Globe de Paris
Guillaume Boudoire
Institut de Physique du Globe de Paris
Thierry Bourrianne
CNRM Centre National de Recherches Meteorologiques
Christophe Brunet
Institut de Physique du Globe de Paris
Fréderic Burnet
CNRM Centre National de Recherches Meteorologiques
Jean-Pierre Cammas
Université de La Réunion
OSU-R
Franck Gabarrot
OSU-R
Bo Galle
Chalmers, Earth and Space Sciences, Optical Remote Sensing
G. Giudice
National Institute of Geophysics and Volcanology
Christian Guadagno
ORA
Fréderic Jeamblu
Université de La Réunion
Philipp Kowalski
Institut de Physique du Globe de Paris
Jimmy Leclair de Bellevue
Université de La Réunion
Nicolas Marquestaut
OSU-R
Dominique Mékies
Université de La Réunion
Jean-Marc Metzger
Université de La Réunion
Joris Pianezze
Université de La Réunion
Thierry Portafaix
Université de La Réunion
Jean Sciare
Cyprus Institute
Arnaud Tournigand
ORA
N. Villeneuve
Institut de Physique du Globe de Paris
Atmospheric Chemistry and Physics
16807316 (ISSN) 16807324 (eISSN)
Vol. 17 8 5355-5378Subject Categories
Meteorology and Atmospheric Sciences
Geosciences, Multidisciplinary
Roots
Basic sciences
DOI
10.5194/acp-17-5355-2017