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Geosciences 2018, 8(2), 36; https://doi.org/10.3390/geosciences8020036

Aerosol Optical Properties of Pacaya Volcano Plume Measured with a Portable Sun-Photometer

1
Laboratoire de Météorologie Dynamique, Institut Pierre Simon Laplace, École Normale Supérieure, PSL Research University, École Polytechnique, Université Paris-Saclay, Sorbonne Université, UPMC Université Paris 6, CNRS, 75005 Paris, France
2
Istituto Nazionale di Geofisica e Vulcanologia, Osservatorio Etneo, I95123 Catania, Italy
*
Author to whom correspondence should be addressed.
Received: 14 October 2017 / Revised: 22 December 2017 / Accepted: 22 December 2017 / Published: 23 January 2018
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Abstract

In this paper, Sun-photometer multichannel measurements of aerosol optical depths (AODs) in the visible and near-infrared spectral ranges, and Ångström parameters of the plume issued from the Pacaya volcano, Guatemala, are presented for the first time. These observations, made during a short-term campaign carried out on 29 and 30 January 2011, indicate a diluted (AODs lower than 0.1) volcanic plume composed of small particles (Ångström exponent ∼1.0 on 29 January and ∼1.4 on 30 January). Results are consistent with an ash-free plume. Finally, the impact of the choice of different wavelength pairs for the calculation of the Ångström parameters from the spectral AOD observations is tested and critically discussed. View Full-Text
Keywords: volcanic aerosols; portable photometry; aerosol optical properties volcanic aerosols; portable photometry; aerosol optical properties
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Sellitto, P.; Spampinato, L.; Salerno, G.G.; La Spina, A. Aerosol Optical Properties of Pacaya Volcano Plume Measured with a Portable Sun-Photometer. Geosciences 2018, 8, 36.

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