Estimation of dispersion coefficient in the troposphere from satellite images of volcanic plumes: Application to Mt. Etna, Italy

TitleEstimation of dispersion coefficient in the troposphere from satellite images of volcanic plumes: Application to Mt. Etna, Italy
Publication TypeArticolo su Rivista peer-reviewed
Year of Publication2006
AuthorsTiesi, A., Villani Maria Gabriella, D'Isidoro Massimo, Prata A.J., Maurizi A., and Tampieri F.
JournalAtmospheric Environment
Volume40
Pagination628-638
ISSN13522310
KeywordsLagrangian stochastic model, Transport, Turbulent dispersion, Volcanic eruptions
Abstract

The lateral dispersion of volcanic plumes in the troposphere is investigated using satellite images. Two plume images have been selected from the Mount Etna eruption that occurred in October/November 2002. To reproduce the satellite images two modelling approaches are presented. The first one uses deterministic trajectories released from a line source extending over a range of altitudes chosen from direct observations. The second uses stochastic trajectories from an area source located at a fixed height, where the source size and the effective diffusion coefficient are determined by data analysis. The meteorological model BOLAM (Bologna Limited Area Model) supplies the atmospheric dynamics. Both approaches reproduce the main features of the observed plumes, with differences in the cross section distribution of the density. © 2005 Elsevier Ltd. All rights reserved.

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URLhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-29344452441&doi=10.1016%2fj.atmosenv.2005.09.079&partnerID=40&md5=63b63abc8b9ebaed21d7f342fad87dd4
DOI10.1016/j.atmosenv.2005.09.079