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Estimates of heat and pyroclast discharge by volcanic eruptions based upon the eruption cloud and steady plume observations

Fedotov S.A. (1985) Estimates of heat and pyroclast discharge by volcanic eruptions based upon the eruption cloud and steady plume observations // Journal of Geodynamics. Vol. 3, No. 3-4. pp. 275-302. doi: 10.1016/0264-3707(85)90039-0.

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Official URL: http://www.sciencedirect.com/science/article/pii/0...

Abstract

Fumarolic steam plumes and eruption clouds rise like convetive turbulent columns into the atmosphere. Formulae are presented here for estimating the heat power of plumes, the production rate of juvenile pyroclasts ejected during eruptions and the heat output of fumaroles. Their accuracy is tested using the well-studied examples of eruptions of Kamchatkan volcanoes. The Briggs (1969) formula may be used in observing the ascending part of a plume in crosswinds. The best results have been obtained using the CONCAWE formula which permits estimation of the heat power in crosswinds based on the axis height of a horizontal part of a maintained plume. Three connected equations have been suggested for a stable atmosphere and calm weather conditions. The first one, which is applicable for heights ranging from 100 m to 1 km, is the formula proposed by Morton et al. (1956). This equation changes for higher layers of the troposphere (1–10 km) and stratosphere (10–55 km). A classification scale was constructed allowing us to compare volcanic eruptions and fumarolic activity in terms of the intensity of their plumes. The described method is useful for volcano surveillance; it helps in the study of the energetics and mechanics of volcanic and magmatic processes.
Item Type: Article
Title: Estimates of heat and pyroclast discharge by volcanic eruptions based upon the eruption cloud and steady plume observations
Language: English
Journal or Publication Title: Journal of Geodynamics
ISSN Print: 02643707
Subjects: State scientific and technical information rubricator (ГРНТИ) > 38 ГЕОЛОГИЯ > 38.37 Петрография > 38.37.25 Вулканология
Depositing User: С.Э. Васильев
Date Deposited: 08 Oct 2014 03:39
Last Modified: 18 Dec 2015 03:08
URI: http://repo.kscnet.ru/id/eprint/1868

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