The impact of explosive volcanic plumes on climate and on air traffic strongly depends on
the concentration and grain-size distribution (GSD) of pyroclastic fragments injected into the …

The goal of this paper is to determine the parameters that control the aggregation efficiency
and the growth rate of volcanic particles within the eruption column. Numerical experiments …

The maximum height of an explosive volcanic column, H, depends on the 1/4th power of the
eruptive mass flux, Q, and on the 3/4th power of the stratification of the atmosphere, N …

The turbulent entrainment of atmosphere and the condensation of water vapor govern the
heights of explosive volcanic plumes. These processes thus determine the delivery and the …

During volcanic eruptions, volcanic ash transport and dispersion models (VATDs) are used
to forecast the location and movement of ash clouds over hours to days in order to define …

The scavenging of gases and particles in an explosive volcanic eruption plume has been
studied by numerical simulations with the plume model ATHAM (Active Tracer High …

In an explosive eruption, the atmospheric column dynamics depend strongly on the mass
fraction of gas in the erupting mixture, which is fixed by fragmentation in the volcanic conduit …

The size distribution of volcanic ash is rarely measured in real time and Volcanic Ash
Advisory Centres (VAACs) often rely on a default particle size distribution (PSD) to initialise …

The aggregation of volcanic ash particles within the eruption column of explosive eruptions
has been observed at many volcanoes. It influences the residence time of ash in the …

The size distribution of the population of particles injected into the atmosphere during a
volcanic explosive eruption, ie, the total grain-size distribution (TGSD), can provide …