A. Ackerman, M. Kirkpatrick, D. Stevens, and O. Toon, The impact of humidity above stratiform clouds on indirect aerosol climate forcing, Nature, vol.94, issue.7020, pp.1014-101710, 2004.
DOI : 10.1029/2001JD001011

A. Aiuppa, D. Baker, and J. Webster, Halogens in volcanic systems, Chemical Geology, vol.263, issue.1-4, pp.1-18, 2009.
DOI : 10.1016/j.chemgeo.2008.10.005

B. Albrecht, Aerosols, Cloud Microphysics, and Fractional Cloudiness, Science, vol.245, issue.4923, pp.1227-1230, 1989.
DOI : 10.1126/science.245.4923.1227

A. Ångström, The parameters of atmospheric turbidity, Tellus, pp.64-75, 1964.

J. Baray, Y. Courcoux, P. Keckhut, T. Portafaix, P. Tulet et al., Maïdo observatory: a new high-altitude station facility at Reunion Island (21 ? S, 55 ? E) for long-term atmospheric remote sensing and in situ measurements, Atmos. Meas. Tech, vol.65194, pp.2865-287710, 2013.

F. Bonali, C. Corazzato, and A. Tibaldi, Identifying rift zones on volcanoes: an example from La R??union island, Indian Ocean, Bulletin of Volcanology, vol.7, issue.4, pp.195-204, 2010.
DOI : 10.1016/0377-0273(80)90040-2

J. Boulon, K. Sellegri, M. Hervo, and P. Laj, Observations of nucleation of new particles in a volcanic plume, Proceedings of the National Academy of Sciences, vol.53, issue.5, pp.12223-12226, 2011.
DOI : 10.1034/j.1600-0889.2001.d01-33.x

URL : https://hal.archives-ouvertes.fr/insu-00646651

C. Brogniez, F. Auriol, C. Deroo, A. Arola, J. Kujanpää et al., Validation of satellite-based noontime UVI with NDACC groundbased instruments: influence of topography, environment and satellite overpass time, Atmos. Chem. Phys, vol.165194, pp.15049-1507410, 2016.

M. Bursik, M. Jones, S. Carn, K. Dean, A. Patra et al., Estimation and propagation of volcanic source parameter uncertainty in ash transport and dispersal model: application to the Eyjafjallajöekull, Bull. Volcanol, vol.74, pp.14-16, 2010.

C. Cattrall, J. Reagan, K. Thome, and O. Dubovik, Variability of aerosol and spectral lidar and backscatter and extinction ratios of key aerosol types derived from selected Aerosol Robotic Network locations, Journal of Geophysical Research, vol.109, issue.10, pp.10-1110, 2005.
DOI : 10.1029/2001JD900217

V. Conde, P. Robidoux, G. Avard, B. Galle, A. Aiuppa et al., Measurements of volcanic SO2 and CO2 fluxes by combined DOAS, Multi-GAS and FTIR observations: a case study from Turrialba and Telica volcanoes, International Journal of Earth Sciences, vol.72, issue.3, pp.2335-2347, 2014.
DOI : 10.1119/1.1632486

D. Coppola, N. Villeneuve, D. Muro, A. Ferrazzini, V. Peltier et al., Shallow system rejuvenation and magma discharge trends at Piton de la Fournaise volcano (La R??union Island), Shallow system rejuvenation and magma discharge cycles at Piton de la Fournaise volcano, pp.13-24, 2017.
DOI : 10.1016/j.epsl.2017.01.024

D. Muro, A. Métrich, N. Vergani, D. Rose, M. Armienti et al., The Shallow Plumbing System of Piton de la Fournaise Volcano (La Reunion Island, Indian Ocean) Revealed by the Major 2007 Caldera-Forming Eruption, Journal of Petrology, vol.55, issue.7, pp.1287-1315, 2014.
DOI : 10.1093/petrology/egu025

D. Muro, A. Arellano, S. Aiuppa, S. Bachelery, P. Boudoire et al., Eruption and degassing dynamics of the major, Geophysical Research Abstracts, vol.18, pp.2016-5074, 2015.

D. Muro, A. Métrich, N. Allard, P. Aiuppa, A. Burton et al., Magma degassing at Piton de la Fournaise volcano, Active Volcanoes of the World series, 2016.

V. Duflot, P. Royer, P. Chazette, J. Baray, Y. Courcoux et al., Marine and biomass burning aerosols in the southern Indian Ocean: Retrieval of aerosol optical properties from shipborne lidar and Sun photometer measurements, Journal of Geophysical Research, vol.107, issue.D19, pp.1820810-1029, 2011.
DOI : 10.1029/2000JD000038

URL : https://hal.archives-ouvertes.fr/hal-00961626

J. Durand, P. Tulet, J. Filippi, N. Villeneuve, M. Leriche et al., Modeling the lava heat flux during severe effusive volcanic eruption: An important impact on surface air quality, Journal of Geophysical Research: Atmospheres, vol.38, issue.D1, pp.11729-1174210, 2014.
DOI : 10.1029/2010GL046052

URL : https://hal.archives-ouvertes.fr/hal-01164000

S. K. Ebmeier, A. M. Sayer, R. G. Grainger, T. A. Mather, and E. Carboni, Systematic satellite observations of the impact of aerosols from passive volcanic degassing on local cloud properties, Atmos. Chem. Phys, vol.145194, pp.10601-1061810, 2014.

A. Folch, A. Costa, and S. Basart, Validation of the FALL3D ash dispersion model using observations of the 2010 Eyjafjallaj??kull volcanic ash clouds, Atmospheric Environment, vol.48, pp.165-183, 2012.
DOI : 10.1016/j.atmosenv.2011.06.072

S. Gagné, K. Lehtipalo, H. E. Manninen, T. Nieminen, S. Schobesberger et al., Intercomparison of air ion spectrometers: an evaluation of results in varying conditions, Atmospheric Measurement Techniques, vol.4, issue.5, pp.805-82210, 2011.
DOI : 10.5194/amt-4-805-2011

B. Galle, M. Johansson, C. Rivera, Y. Zhang, M. Kihlman et al., Network for Observation of Volcanic and Atmospheric Change (NOVAC)???A global network for volcanic gas monitoring: Network layout and instrument description, Journal of Geophysical Research, vol.31, issue.21, p.530410, 1029.
DOI : 10.1144/GSL.SP.2003.213.01.02

M. M. Halmer, H. Schmincke, and H. Graf, The annual volcanic gas input into the atmosphere, in particular into the stratosphere: a global data set for the past 100 years, Journal of Volcanology and Geothermal Research, vol.115, issue.3-4, pp.511-52810, 2002.
DOI : 10.1016/S0377-0273(01)00318-3

E. Hamonou, P. Chazette, D. Balis, F. Dulac, X. Schneider et al., Characterization of the vertical structure of Saharan dust export to the Mediterranean basin, Journal of Geophysical Research: Atmospheres, vol.100, issue.suppl. 1, pp.18257-22270, 1999.
DOI : 10.1029/95JD02051

S. R. Hanna, Applications in Air Pollution Modeling, 1982.
DOI : 10.1007/978-94-010-9112-1_7

C. Hibert, A. Mangeney, M. Polacci, D. Muro, A. Vergniolle et al., Toward continuous quantification of lava extrusion rate: Results from the multidisciplinary analysis of the 2 January 2010 eruption of Piton de la Fournaise volcano, La R??union, Journal of Geophysical Research: Solid Earth, vol.40, issue.3, pp.3026-304710, 1002.
DOI : 10.1016/0377-0273(90)90121-U

A. Hirsikko, T. Bergman, L. Laakso, M. Dal-maso, I. Riipinen et al., Identification and classification of the formation of intermediate ions measured in boreal forest, Atmos. Chem. Phys, vol.75194, pp.201-21010, 2007.
URL : https://hal.archives-ouvertes.fr/hal-00296109

P. Hobbs, J. Tuell, D. Hegg, L. Radke, and M. Eltgroth, Particles and gases in the emissions from the 1980???1981 volcanic eruptions of Mt. St. Helens, Journal of Geophysical Research, vol.12, issue.C13, pp.11062-11086, 1982.
DOI : 10.1016/0004-6981(78)90262-7

E. Kaminski, S. Tait, F. Ferrucci, M. Martet, B. Hirn et al., Estimation of ash injection in the atmosphere by basaltic volcanic plumes: The case of the Eyjafjallaj??kull 2010 eruption, Journal of Geophysical Research, vol.33, issue.D19, pp.0-0210, 2011.
DOI : 10.1029/95RG02096

C. Kern, F. Kick, P. Lübcke, L. Vogel, M. Wöhrbach et al., Theoretical description of functionality, applications, and limitations of SO<sub>2</sub> cameras for the remote sensing of volcanic plumes, Atmospheric Measurement Techniques, vol.3, issue.3, pp.733-74910, 2010.
DOI : 10.5194/amt-3-733-2010

K. Knobelspiesse, C. Pietras, and G. Fargion, Sun-Pointing-Error Correction for Sea Deployment of the MICROTOPS II Handheld Sun Photometer, Journal of Atmospheric and Oceanic Technology, vol.20, issue.5, pp.767-771, 2003.
DOI : 10.1175/1520-0426(2003)20<767:SPECFS>2.0.CO;2

J. Lenat, P. Bachelery, J. F. Lenat, D. Muro, A. Michon et al., Active volcanoes of the Southwest Indian Ocean: Piton de la Fournaise and Karthala, Active volcanoes of the world, pp.10-1007, 2016.

D. Lesouëf, F. Gheusi, R. Delmas, and J. Escobar, Numerical simulations of local circulations and pollution transport over Reunion Island, Annales Geophysicae, vol.29, issue.1, pp.53-6910, 2011.
DOI : 10.5194/angeo-29-53-2011

J. Mäkelä, M. Riihelä, A. Ukkonen, V. Jokinen, V. And-keskinen et al., Comparison of mobility equivalent diameter with Kelvin???Thomson diameter using ion mobility data, The Journal of Chemical Physics, vol.7, issue.4, pp.1562-1571, 1996.
DOI : 10.1063/1.470336

J. Marti, A. Jefferson, X. Cai, C. Richert, P. Mcmurry et al., vapor pressure of sulfuric acid and ammonium sulfate solutions, Journal of Geophysical Research: Atmospheres, vol.195, issue.D3, pp.3725-373510, 1997.
DOI : 10.1126/science.195.4282.979

R. Martin, T. Mather, D. Pyle, M. Power, A. Allen et al., Composition-resolved size distributions of volcanic aerosols in the Mt. Etna plumes, Journal of Geophysical Research, vol.35, issue.D8, pp.1721110-1029, 2008.
DOI : 10.2343/geochemj.29.163

T. Mather, D. Pyle, and C. Oppenheimer, Tropospheric volcanic aerosol, Geophys. Mono, vol.102, issue.16, pp.189-212, 2005.
DOI : 10.1029/97JB00155

L. Michon, F. Saint-ange, P. Bachèlery, N. Villeneuve, and T. Staudacher, Role of the structural inheritance of the oceanic lithosphere in the magmato-tectonic evolution of Piton de la Fournaise volcano (La R??union Island), Journal of Geophysical Research: Solid Earth, vol.40, issue.B3, pp.420510-1029, 2007.
DOI : 10.1016/0377-0273(90)90121-U

L. Michon, D. Muro, A. Villeneuve, N. Saint-marc, C. Fadda et al., Explosive activity of the summit cone of Piton de la Fournaise volcano (La R??union island): A historical and geological review, Journal of Volcanology and Geothermal Research, vol.264, pp.117-133, 2013.
DOI : 10.1016/j.jvolgeores.2013.06.012

L. Michon, V. Ferrazzini, D. Muro, A. Villeneuve, N. Famin et al., Rift zones and magma plumbing system of Piton de la Fournaise volcano: How do they differ from Hawaii and Etna?, Journal of Volcanology and Geothermal Research, vol.303, pp.112-129, 2015.
DOI : 10.1016/j.jvolgeores.2015.07.031

URL : https://hal.archives-ouvertes.fr/hal-01241283

S. Mikkonen, S. Romakkaniemi, J. Smith, H. Korhonen, T. Petäjä et al., A statistical proxy for sulphuric acid concentration, Atmos. Chem. Phys, vol.115194, pp.11319-1133410, 2011.
DOI : 10.5194/acp-11-11319-2011

M. Ort, D. Muro, A. Michon, L. Bachelery, and P. , Explosive eruptions from the interaction of magmatic and hydrothermal systems during flank extension: the Bellecombe Tephra of Piton de La Fournaise (La R??union Island), Bulletin of Volcanology, vol.104, issue.232, pp.1-14, 2016.
DOI : 10.1016/S0377-0273(00)00212-2

A. Peltier, P. Bachèlery, and T. Staudacher, Magma transport and storage at Piton de La Fournaise (La R??union) between 1972 and 2007: A review of geophysical and geochemical data, Journal of Volcanology and Geothermal Research, vol.184, issue.1-2, pp.93-108, 2009.
DOI : 10.1016/j.jvolgeores.2008.12.008

A. Peltier, M. Bianchi, E. Kaminski, J. Komorowski, A. Rucci et al., PSInSAR as a new tool to monitor pre-eruptive volcano ground deformation: Validation using GPS www.atmos-chem-phys.net, Atmos. Chem. Phys, vol.175355, issue.17, pp.5355-5378, 2017.
DOI : 10.1029/2010gl043846

URL : http://onlinelibrary.wiley.com/doi/10.1029/2010GL043846/pdf

P. Tulet, First results of the STRAP 2015 campaign measurements on Piton de la Fournaise, Geophys. Res. Lett, vol.37, pp.10-1029, 2010.

A. Peltier, F. Massin, P. Bachèlery, and A. Finizola, Internal structure and building of basaltic shield volcanoes: the example of the Piton de La Fournaise terminal cone (La R??union), Bulletin of Volcanology, vol.274, issue.1???2, pp.1881-189710, 2012.
DOI : 10.1098/rsta.1973.0030

A. Peltier, F. Beauducel, N. Villeneuve, V. Ferrazzini, D. Muro et al., Deep fluid transfer evidenced by surface deformation during the 2014???2015 unrest at Piton de la Fournaise volcano, Journal of Volcanology and Geothermal Research, vol.321, pp.140-148, 2016.
DOI : 10.1016/j.jvolgeores.2016.04.031

J. Penner, M. Andreae, H. Annegarn, L. Barrie, J. Feichter et al., Aerosols, their direct and indirect effects, Climate Change: The scientific basis, pp.289-349, 2001.

C. Pietras, K. D. Knobelspiesse, R. Frouin, B. Holben, K. Voss et al., Calibration of Sun photometers and sky radiance sensors, in: Ocean Optics Protocols for Satellite Ocean Color Sensor Validation, pp.20021-210004, 2002.

L. Pirjola, M. Kulmala, M. Wilck, A. Bischoff, F. Stratmann et al., FORMATION OF SULPHURIC ACID AEROSOLS AND CLOUD CONDENSATION NUCLEI: AN EXPRESSION FOR SIGNIFICANT NUCLEATION AND MODEL COMPRARISON, Journal of Aerosol Science, vol.30, issue.8, pp.1079-1094, 1999.
DOI : 10.1016/S0021-8502(98)00776-9

G. Pisani, A. Boselli, M. Coltelli, G. Leto, G. Pica et al., Lidar depolarization measurement of fresh volcanic ash from Mt. Etna, Italy, Atmospheric Environment, vol.62, pp.34-40, 2012.
DOI : 10.1016/j.atmosenv.2012.08.015

M. Ripepe, C. Bonadonna, A. Folch, D. D. Donne, G. Lacanna et al., Ash-plume dynamics and eruption source parameters by infrasound and thermal imagery: The 2010 Eyjafjallaj??kull eruption, Earth and Planetary Science Letters, vol.366, pp.112-121, 2013.
DOI : 10.1016/j.epsl.2013.02.005

URL : https://iris.unipa.it/bitstream/10447/97559/2/2013_Ripepe_et_al_EPSL2013.pdf

A. Robock, Volcanic eruptions and climate, Reviews of Geophysics, vol.23, issue.44, pp.191-219, 2000.
DOI : 10.1029/96GL00706

W. I. Rose, G. A. Millard, T. A. Mather, D. E. Hunton, B. Anderson et al., Atmospheric chemistry of a 33???34 hour old volcanic cloud from Hekla Volcano (Iceland): Insights from direct sampling and the application of chemical box modeling, Journal of Geophysical Research, vol.102, issue.D4, p.10, 1029.
DOI : 10.1007/978-1-4020-2167-1_7

G. Roult, A. Peltier, B. Taisne, T. Staudacher, V. Ferrazzini et al., A new comprehensive classification of the Piton de la Fournaise eruptions spanning the 1986-2011 period, Search and analysis of eruption precursors from a broad-band seismological station, J. Volcanol. Geotherm. Res, vol.241242, pp.78-104, 2012.

G. Salerno, M. Burton, C. Oppenheimer, T. Caltabiano, D. Randazzo et al., Three-years of SO2 flux measurements of Mt. Etna using an automated UV scanner array: Comparison with conventional traverses and uncertainties in flux retrieval, Journal of Volcanology and Geothermal Research, vol.183, issue.1-2, pp.76-83, 2009.
DOI : 10.1016/j.jvolgeores.2009.02.013

I. Sandu, J. Brenguier, O. Thouron, and B. Stevens, How important is the vertical structure for the representation of aerosol impacts on the diurnal cycle of marine stratocumulus?, Atmos . Chem. Phys, vol.95194, pp.4039-405210, 2009.

Y. Seity, P. Brousseau, S. Malardel, G. Hello, P. Bénard et al., The AROME-France Convective-Scale Operational Model, Monthly Weather Review, vol.139, issue.3, pp.976-99110, 2011.
DOI : 10.1175/2010MWR3425.1

A. Smirnov, B. N. Holben, T. F. Eck, O. Dubovik, and I. Slutsker, Cloud-Screening and Quality Control Algorithms for the AERONET Database, Remote Sensing of Environment, vol.73, issue.3, pp.337-349, 2000.
DOI : 10.1016/S0034-4257(00)00109-7

T. Staudacher, A. Peltier, P. Bachelery, J. F. Lenat, D. Muro et al., Ground deformation at Piton de la Fournaise (La Réunion Island), a review from 20 years of GNSS monitoring, in: Active volcanoes of the Southwest Indian Ocean: Piton de la Fournaise and Karthala. Active volcanoes of the world, pp.10-1007, 2015.

T. Staudacher, V. Ferrazzini, A. Peltier, P. Kowalski, P. Boissier et al., The April 2007 eruption and the Dolomieu crater collapse, two major events at Piton de la Fournaise (La R??union Island, Indian Ocean), Journal of Volcanology and Geothermal Research, vol.184, issue.1-2, pp.126-137, 2009.
DOI : 10.1016/j.jvolgeores.2008.11.005

T. Staudacher, A. Peltier, V. Ferrazzini, D. Muro, A. Boissier et al., Fifteen Years of Intense Eruptive Activity (1998???2013) at Piton de la Fournaise Volcano: A Review, Active volcanoes of the Southwest Indian Ocean: Piton de la Fournaise and Karthala. Active volcanoes of the world, p.10, 2015.
DOI : 10.1007/978-3-642-31395-0_9

B. Stevens, W. R. Cotton, G. Feingold, and C. Moeng, Large-Eddy Simulations of Strongly Precipitating, Shallow, Stratocumulus-Topped Boundary Layers, Journal of the Atmospheric Sciences, vol.55, issue.24, pp.3616-3638, 1998.
DOI : 10.1175/1520-0469(1998)055<3616:LESOSP>2.0.CO;2

A. Stohl, C. Forster, A. Frank, P. Seibert, and G. Wotawa, Technical note: The Lagrangian particle dispersion model FLEXPART version 6.2, Atmos. Chem. Phys, vol.55194, pp.2461-247410, 2005.
DOI : 10.5194/acpd-5-4739-2005

URL : https://hal.archives-ouvertes.fr/hal-00295743

P. Tulet and N. Villeneuve, Large scale modeling of the transport, chemical transformation and mass budget of the sulfur emitted during the April 2007 eruption of Piton de la Fournaise, Atmospheric Chemistry and Physics, vol.11, issue.9, pp.4533-4546, 2007.
DOI : 10.5194/acp-11-4533-2011

URL : https://hal.archives-ouvertes.fr/hal-00961625

N. Villeneuve and P. Bachèlery, Revue de la typologie des éruptions au Piton de la Fournase, processus et risqué volcaniques associés, Cybergeo: European Journal of Geography, p.336, 2006.
DOI : 10.4000/cybergeo.2536

A. Wiedensohler, W. Birmili, and A. Nowak, Particle mobility size spectrometers: harmonization of technical standards and data structure to facilitate high quality long-term observations of atmospheric particle size distributions, Atmos. Meas. Tech, vol.55194, pp.657-68510, 2012.
URL : https://hal.archives-ouvertes.fr/insu-00844363