Volcanic ash in the free atmosphere

A dynamical systems approach

T. Haszpra, T. Tél

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

The motion of volcanic ash particles is described on large scales by an ordinary differential equation, and the dynamics is chaotic. Deposition with a terminal velocity is found to be influenced by all three components of the wind velocity. The particles sooner or later leave the free atmosphere and enter the planetary boundary layer. Chaos is thus transient, and we point out that quantities like escape rate, average lifetime and topological entropy can efficiently be applied to characterize the volcanic ash dynamics in the free atmosphere. These quantities are evaluated for particular eruption examples of volcano Eyjafjallajökull, as well as for volcanic averages taken at different geographical locations, and for global averages over the Earth.

Original languageEnglish
Article number012008
JournalJournal of Physics: Conference Series
Volume333
Issue number1
DOIs
Publication statusPublished - 2011

Fingerprint

free atmosphere
ashes
dynamical systems
volcanology
planetary boundary layer
terminal velocity
wind velocity
volcanoes
volcanic eruptions
escape
chaos
differential equations
entropy
life (durability)

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Volcanic ash in the free atmosphere : A dynamical systems approach. / Haszpra, T.; Tél, T.

In: Journal of Physics: Conference Series, Vol. 333, No. 1, 012008, 2011.

Research output: Contribution to journalArticle

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