T. J. Roberts, D. Vignelles, M. Liuzzo, G. Giudice, A. Aiuppa et al., The primary volcanic aerosol emission from Mt Etna: Size-resolved particles with SO2 and role in plume reactive halogen chemistry, Geochim. Cosmochim. Acta, vol.222, pp.74-93, 2018.
URL : https://hal.archives-ouvertes.fr/insu-01618121

A. S. Daag, B. S. Tubianosa, C. Newhall, N. Tungol, D. Javier et al., Monitoring sulfur dioxide emission at Mount Pinatubo, Fire and Mud: Eruptions and lahars of Mount, pp.409-414, 1996.

M. M. Halmer, H. U. Schmincke, and H. F. Graf, The annual volcanic gas input into the atmosphere, in particular into the stratosphere: A global data set for the past 100 years, J. Volcanol. Geotherm. Res, vol.115, pp.511-528, 2002.

L. Klüser, T. Erbertseder, and J. Meyer-arnek, Observation of volcanic ash from Puyehue-Cordón Caulle with IASI, Atmos. Meas. Tech, vol.6, 2013.

C. Bignami, S. Corradini, L. Merucci, M. De-michele, D. Raucoules et al., Multisensor Satellite Monitoring of the 2011 Puyehue-Cordon Caulle Eruption, IEEE J. Sel. Topics Appl. Earth Observ. Remote Sens, vol.7, pp.2786-2796, 2014.
URL : https://hal.archives-ouvertes.fr/hal-01176365

A. Robock, Volcanic eruptions and climate, Rev. Geophys, vol.38, pp.191-219, 2000.

S. B. Diaz, A. A. Paladini, H. G. Braile, M. C. Dieguez, G. A. Deferrari et al., Global and direct UV irradiance variation in the Nahuel Huapi National Park (Patagonia, Argentina) after the eruption of Puyehue-Cordon Caulle (Chile), J. Atmospheric Sol. Terr. Phys, vol.112, pp.47-56, 2014.

S. A. Carn and N. A. Krotkov, Chapter 12-Ultraviolet Satellite Measurements of Volcanic Ash, Volcanic Ash

S. Mackie, K. Cashman, H. Ricketts, A. Rust, and M. Watson, , pp.217-231, 2016.

G. B. Raga, D. Baumgardner, A. G. Ulke, M. Torres-brizuela, and B. Kucienska, The environmental impact of the Puyehue-Cordon Caulle, Buenos Aires. Nat. Hazards Earth Syst. Sci, vol.13, pp.2319-2330, 2011.

C. Bonadonna, M. Pistolesi, R. Cioni, W. Degruyter, M. Elissondo et al., Dynamics of wind-affected volcanic plumes: The example of the 2011 Cordón Caulle eruption, Chile. J. Geophys. Res. Solid Earth, vol.120, pp.2242-2261, 2015.

C. Silva-parejas, L. Lara, D. Bertin, A. Amigo, and G. Orozco, The 2011-2012 eruption of Cordón Caulle volcano (Southern Andes): Evolution, crisis management and current hazards, Proceedings of EGU General Assembly Conference Abstracts, p.9382, 2012.

E. Brunke, C. Labuschagne, and H. E. Scheel, Trace gas variations at Cape Point, South Africa, during May 1997 following a regional biomass burning episode, Atmos. Environ, vol.35, pp.777-786, 2001.

J. Hovila, A. Arola, and J. Tamminen, OMI/Aura Surface UVB Irradiance and Erythemal Dose Daily L3 Global Gridded 1.0 degree x 1.0 degree V3; NASA Goddard Space Flight Center, Goddard Earth Sciences Data and Information Services Center (GES DISC, 2013.

C. Brogniez, F. Auriol, C. Deroo, A. Arola, J. Kujanpää et al., Validation of satellite-based noontime UVI with NDACC ground-based instruments: Influence of topography, environment and satellite overpass time, Atmos. Chem. Physics, vol.16, 2016.

V. Fioletov, J. B. Kerr, and A. Fergusson, The UV index: Definition, distribution and factors affecting it, Can. J. Public Health, vol.101, pp.5-9, 2010.

J. Cadet, H. Bencherif, T. Portafaix, K. Lamy, K. Ncongwane et al., Comparison of Ground-Based and Satellite-Derived Solar UV Index Levels at Six South African Sites, Int. J. Environ. Res. Public Health, vol.14, 1384.
URL : https://hal.archives-ouvertes.fr/hal-01646295

L. J. Mcarthur, D. H. Halliwell, O. J. Niebergall, N. T. O'neill, J. R. Slusser et al., Field comparison of network Sun photometers, J. Geophys. Res. Atmos, vol.108, 2003.

S. Nyeki, C. H. Halios, W. Baum, K. Eleftheriadis, H. Flentje et al., Ground-based aerosol optical depth trends at three high-altitude sites in Switzerland and southern Germany from 1995 to 2010, J. Geophys. Res. Atmos, vol.117, p.18202, 2012.

A. Smirnov, B. Holben, T. Eck, O. Dubovik, and I. Slutsker, Cloud-screening and quality control algorithms for the AERONET database, Remote Sens. Environ, vol.73, pp.337-349, 2000.

C. A. Greene, K. Thirumalai, K. A. Kearney, J. M. Delgado, W. Schwanghart et al., The climate data toolbox for MATLAB, Geochem. Geophys. Geosystems, vol.20, pp.3774-3781, 2019.

, MERRA-2 tavg1_2d_aer_Nx: 2d,1-Hourly, Time-averaged, Single-Level, Assimilation, Aerosol Diagnostics V5.12.4; Goddard Earth Sciences Data and Information Services Center, 2015.

A. Ukhov, S. Mostamandi, N. Krotkov, J. Flemming, A. Da-silva et al., Study of SO Pollution in the Middle East Using MERRA-2, CAMS Data Assimilation Products, and High-Resolution WRF-Chem Simulations, J. Geophys. Res. Atmos, vol.125, 2020.

L. Clarisse, D. Hurtmans, C. Clerbaux, J. Hadji-lazaro, Y. Ngadi et al., Retrieval of sulphur dioxide from the infrared atmospheric sounding interferometer (IASI), Atmos. Meas. Tech, vol.5, pp.581-594, 2012.
URL : https://hal.archives-ouvertes.fr/hal-00650327

L. Clarisse and F. Prata, Infrared sounding of volcanic ash, Volcanic ash: Methods of observation and monitoring
URL : https://hal.archives-ouvertes.fr/hal-00433227

S. Mackie, K. Cashman, H. Ricketts, A. Rust, and M. Watson, , 2015.

E. D. Moxnes, N. I. Kristiansen, A. Stohl, L. Clarisse, A. Durant et al., Separation of ash and sulfur dioxide during the 2011 Grímsvötn eruption, J. Geophys. Res. Atmos, vol.119, pp.7477-7501, 2014.

N. Theys, R. Campion, L. Clarisse, H. Brenot, J. Van-gent et al., Volcanic SO 2 fluxes derived from satellite data: A survey using OMI, GOME-2, IASI and MODIS, Atmos. Chem. Phys, vol.13, pp.5945-5968, 2013.
URL : https://hal.archives-ouvertes.fr/hal-00768974

E. Carboni, R. G. Grainger, T. A. Mather, D. M. Pyle, G. E. Thomas et al., The vertical distribution of volcanic SO2 plumes measured by IASI, Atmos. Chem. Phys, vol.16, pp.4343-4367, 2016.

I. Pisso, E. Sollum, H. Grythe, N. Kristiansen, M. Cassiani et al., The Lagrangian particle dispersion model FLEXPART version 10.3. Geosci. Model Dev, pp.1-67, 2019.

J. C. Walker, E. Carboni, A. Dudhia, and R. G. Grainger, Improved detection of sulphur dioxide in volcanic plumes using satellite-based hyperspectral infrared measurements: Application to the Eyjafjallajökull 2010 eruption, J. Geophys. Res. Atmos, vol.117, 2012.

S. Eckhardt, A. J. Prata, P. Seibert, K. Stebel, and A. Stohl, Estimation of the vertical profile of sulfur dioxide injection into the atmosphere by a volcanic eruption using satellite column measurements and inverse transport modeling, Atmos. Chem. Phys, vol.8, pp.3881-3897, 2008.
URL : https://hal.archives-ouvertes.fr/hal-00303987

S. Nyeki, C. Wehrli, J. Gröbner, N. Kouremeti, S. Wacker et al., The GAW-PFR aerosol optical depth network: The 2008-2013 time series at Cape Point Station, South Africa, J. Geophys. Res. Atmos, vol.120, pp.5070-5084, 2015.

M. Tesfaye, V. Sivakumar, J. Botai, and G. Mengistu-tsidu, Aerosol climatology over South Africa based on 10 years of Multiangle Imaging Spectroradiometer (MISR) data, J. Geophys. Res. Atmos, vol.116, 2011.

N. V. Balashov, A. M. Thompson, S. J. Piketh, and K. E. Langerman, Surface ozone variability and trends over the South African Highveld from 1990 to, J. Geophys. Res. Atmos, vol.119, pp.4323-4342, 2007.

J. B. Kerr, Understanding the factors that affect surface ultraviolet radiation, Optical Eng, vol.44, p.41002, 2005.

T. Günther, M. Schulze, A. Friederici, and H. Theisel, Visualizing Volcanic Clouds in the Atmosphere and Their Impact on Air Traffic, IEEE Comput. Graph. Appl, vol.36, pp.36-47, 2016.

, This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license, © 2020 by the authors. Licensee MDPI