Sensitivity analysis of a one-dimensional model of a volcanic plume with particle fallout and collapse behavior

摘要

We run a volcanic plume model with uncertain boundary conditions and entrainment related model parameters. Output variables tested for their sensitivity to the inputs are total rise height, and mass flux of particles into the umbrella cloud or downwind plume. Boundary or source conditions are vent radius, initial velocity, grain size mean and grain size standard deviation. Model parameters are entrainment rate, alpha, wind entrainment rate, beta, and wind speed.