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Open AccessArticle

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

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
Istituto Nazionale di Geofisica e Vulcanologia, Osservatorio Etneo, I95123 Catania, Italy
Author to whom correspondence should be addressed.
Geosciences 2018, 8(2), 36;
Received: 14 October 2017 / Revised: 22 December 2017 / Accepted: 22 December 2017 / Published: 23 January 2018
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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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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