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Article

Quantitative Retrieval of Volcanic Sulphate Aerosols from IASI Observations

1
Laboratoire Interuniversitaire des Systèmes Atmosphériques (LISA), UMR CNRS 7583, Institut Pierre Simon Laplace (IPSL), Université Paris-Est-Créteil, Université de Paris, 94000 Créteil, France
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Laboratoire de Météorologie Dynamique (LMD), UMR CNRS 8539, Ecole Polytechnique, Institut Pierre Simon Laplace, Ecole Normale Supérieure, Université Paris-Saclay, Sorbonne Universités, Route de Saclay, 91128 Palaiseau, France
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National School of Engineers of Sfax, Water, Energy and Environment Laboratory L3E, University of Sfax, B.P 1173, 3021 Sfax, Tunisia
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COMET, Atmospheric, Oceanic and Planetary Physics, University of Oxford, Clarendon Laboratory, Parks Road, Oxford OX1 3PU, UK
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UK Research and Innovation, Science and Technology Facilities Council, Rutherford Appleton Laboratory, Chilton OX11 0QX, UK
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Istituto Nazionale di Geofisica e Vulcanologia (INGV), OE, 95123 Catania, Italy
*
Author to whom correspondence should be addressed.
Academic Editor: Juan Antonio Bravo-Aranda
Remote Sens. 2021, 13(9), 1808; https://doi.org/10.3390/rs13091808
Received: 28 January 2021 / Revised: 26 March 2021 / Accepted: 13 April 2021 / Published: 6 May 2021
We developed a new retrieval algorithm based on the Infrared Atmospheric Sounding Interferometer (IASI) observations, called AEROIASI-H2SO4, to measure the extinction and mass concentration of sulphate aerosols (binary solution droplets of sulphuric acid and water), with moderate random uncertainties (typically ∼35% total uncertainty for column mass concentration estimations). The algorithm is based on a self-adapting Tikhonov–Phillips regularization method. It is here tested over a moderate-intensity eruption of Mount Etna volcano (18 March 2012), Italy, and is used to characterise this event in terms of the spatial distribution of the retrieved plume. Comparisons with simultaneous and independent aerosol optical depth observations from MODIS (Moderate Resolution Imaging Spectroradiometer), SO2 plume observations from IASI and simulations with the CHIMERE chemistry/transport model show that AEROIASI-H2SO4 correctly identifies the volcanic plume horizontal morphology, thus providing crucial new information towards the study of volcanic emissions, volcanic sulphur cycle in the atmosphere, plume evolution processes, and their impacts. Insights are given on the possible spectroscopic evidence of the presence in the plume of larger-sized particles than previously reported for secondary sulphate aerosols from volcanic eruptions. View Full-Text
Keywords: volcanic plumes; IASI; sulphate aerosols; inverse problems in Earth observations volcanic plumes; IASI; sulphate aerosols; inverse problems in Earth observations
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MDPI and ACS Style

Guermazi, H.; Sellitto, P.; Cuesta, J.; Eremenko, M.; Lachatre, M.; Mailler, S.; Carboni, E.; Salerno, G.; Caltabiano, T.; Menut, L.; Serbaji, M.M.; Rekhiss, F.; Legras, B. Quantitative Retrieval of Volcanic Sulphate Aerosols from IASI Observations. Remote Sens. 2021, 13, 1808. https://doi.org/10.3390/rs13091808

AMA Style

Guermazi H, Sellitto P, Cuesta J, Eremenko M, Lachatre M, Mailler S, Carboni E, Salerno G, Caltabiano T, Menut L, Serbaji MM, Rekhiss F, Legras B. Quantitative Retrieval of Volcanic Sulphate Aerosols from IASI Observations. Remote Sensing. 2021; 13(9):1808. https://doi.org/10.3390/rs13091808

Chicago/Turabian Style

Guermazi, Henda, Pasquale Sellitto, Juan Cuesta, Maxim Eremenko, Mathieu Lachatre, Sylvain Mailler, Elisa Carboni, Giuseppe Salerno, Tommaso Caltabiano, Laurent Menut, Mohamed M. Serbaji, Farhat Rekhiss, and Bernard Legras. 2021. "Quantitative Retrieval of Volcanic Sulphate Aerosols from IASI Observations" Remote Sensing 13, no. 9: 1808. https://doi.org/10.3390/rs13091808

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