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

Geosciences

Alessandro La Spina¹  Giuseppe G. Salerno¹  Letizia Spampinato¹  Pasquale Sellitto² 

[1] Istituto Nazionale di Geofisica e Vulcanologia, Osservatorio Etneo, I95123 Catania, Italy;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;

关键词: volcanic aerosols;    portable photometry;    aerosol optical properties;   

DOI  :  10.3390/geosciences8020036

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown