Physics – Geophysics
Scientific paper
May 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004georl..3110607d&link_type=abstract
Geophysical Research Letters, Volume 31, Issue 10, CiteID L10607
Physics
Geophysics
5
Mathematical Geophysics: Modeling, Mathematical Geophysics: Nonlinear Dynamics, Volcanology: Eruption Mechanisms, Volcanology: Ash Deposits, Volcanology: Planetary Volcanism (5480)
Scientific paper
Two contrasting eruptive regimes have been classically postulated to describe the behavior of explosive eruptions: convective and collapsing. Early studies have recognized that many eruptions evolve from the first to the second regime and have assumed the existence of a sharp boundary between them. Consequently, the dynamics of such transition has never been investigated in detail. Here, we present results of integrated deposit analyses and numerical simulations which demonstrate univocally that both dynamics can, and often do, coexist for hours in a new intermediate transitional regime of explosive eruptions. The study elucidates the features of the new regime in terms of mass partitioning, pyroclastic current dynamics and interplay among convective and collapsing styles.
di Muro Andrea
Neri Alessandro
Rosi Marzio
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