Sulphur mass balance and radiative forcing estimation for a moderate volcanic eruption using new sulphate aerosols retrievals based on IASI observations
- 1Laboratoire Inter-universitaire des Systèmes Atmosphériques, UMR CNRS 7583, Université Paris-Est-Créteil, Université de Paris, Institut Pierre Simon Laplace, Créteil, France
- 2Laboratoire de Météorologie Dynamique, UMR CNRS 8539, École Normale Supérieure, PSL research University, École Polytechnique, Sorbonne Universités, École des Ponts PARISTECH, Institut Pierre Simon Laplace, Paris, France
- 3National School of Engineers of Sfax, Water, Energy and Environment Laboratory L3E, University of Sfax, Tunisia
- 4COMET, Atmospheric, Oceanic and Planetary Physics, University of Oxford, Clarendon Laboratory, Oxford, United Kingdom
- 5UK Research and Innovation, Science and Technology Facilities Council, Rutherford Appleton Laboratory, Chilton, United Kingdom
- 6Istituto Nazionale di Geofisica e Vulcanologia, Osservatorio Etneo, Catania, Italy
- 1Laboratoire Inter-universitaire des Systèmes Atmosphériques, UMR CNRS 7583, Université Paris-Est-Créteil, Université de Paris, Institut Pierre Simon Laplace, Créteil, France
- 2Laboratoire de Météorologie Dynamique, UMR CNRS 8539, École Normale Supérieure, PSL research University, École Polytechnique, Sorbonne Universités, École des Ponts PARISTECH, Institut Pierre Simon Laplace, Paris, France
- 3National School of Engineers of Sfax, Water, Energy and Environment Laboratory L3E, University of Sfax, Tunisia
- 4COMET, Atmospheric, Oceanic and Planetary Physics, University of Oxford, Clarendon Laboratory, Oxford, United Kingdom
- 5UK Research and Innovation, Science and Technology Facilities Council, Rutherford Appleton Laboratory, Chilton, United Kingdom
- 6Istituto Nazionale di Geofisica e Vulcanologia, Osservatorio Etneo, Catania, Italy
Abstract. We developed a new retrieval algorithm based on the Infrared Atmospheric Sounding Interferometer (IASI) observations, called AEROIASI-Sulphates, to measure vertically-resolved sulphate aerosols (SA) extinction and mass concentration profiles, with limited theoretical uncertainties (typically ~25 % total uncertainty for SA mass column estimations). The algorithm, based on a self-adapting Tikhonov-Phillips regularization method, is applied to a medium-sized-intensity eruption of Mount Etna volcano (18 March 2012). Comparisons with simultaneous and independent SO2 plume observations and simulations show that AEROIASI-Sulphates correctly identifies the volcanic plume morphology both horizontally and vertically. This method provided, for the first time, crucial information pieces to describe the gaseous-to-particulate volcanic sulphur mass balance (60 % of the injected sulphur mass is converted to particulate matter, after ~24 hours) and to estimate the regional shortwave direct radiative forcing (a regional forcing of −0.8 W/m2 is exerted in the eastern Mediterranean) for moderate volcanic eruptions.
Henda Guermazi et al.


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RC1: 'Review of 'Sulphur mass balance and radiative forcing estimation for a moderate volcanic eruption using new sulphate aerosols retrievals based on IASI observations' by Guermazi et al.', Anonymous Referee #2, 23 Oct 2019
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AC1: 'reply to referee #1', Henda Guermazi, 07 Apr 2020
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AC1: 'reply to referee #1', Henda Guermazi, 07 Apr 2020
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RC2: 'Review', Anonymous Referee #1, 30 Oct 2019
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AC2: 'reply to referee #2', Henda Guermazi, 07 Apr 2020
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AC2: 'reply to referee #2', Henda Guermazi, 07 Apr 2020


-
RC1: 'Review of 'Sulphur mass balance and radiative forcing estimation for a moderate volcanic eruption using new sulphate aerosols retrievals based on IASI observations' by Guermazi et al.', Anonymous Referee #2, 23 Oct 2019
-
AC1: 'reply to referee #1', Henda Guermazi, 07 Apr 2020
-
AC1: 'reply to referee #1', Henda Guermazi, 07 Apr 2020
-
RC2: 'Review', Anonymous Referee #1, 30 Oct 2019
-
AC2: 'reply to referee #2', Henda Guermazi, 07 Apr 2020
-
AC2: 'reply to referee #2', Henda Guermazi, 07 Apr 2020
Henda Guermazi et al.
Henda Guermazi et al.
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Cited
2 citations as recorded by crossref.
- Small-scale volcanic aerosols variability, processes and direct radiative impact at Mount Etna during the EPL-RADIO campaigns P. Sellitto et al. 10.1038/s41598-020-71635-1
- New strategies for vertical transport in chemistry transport models: application to the case of the Mount Etna eruption on 18 March 2012 with CHIMERE v2017r4 M. Lachatre et al. 10.5194/gmd-13-5707-2020