Sensitivity analysis of the 1-D convective cloud model outputs on the dynamical parameters

Abstract

Forced 1-D time-dependent numerical model of Cb cloud is used to analyse the sensitivity of the model products on dynamical parameters. The model considers the processes of horizontal entrainment, forced lifting through the cloud base as well as the six forms of water substance: water vapour, cloud water, cloud ice, rain, snow and hail. Atmospheric soundings for deep storm situation are used as initial and evironmental conditions. The maxima model values of vertical velocity, cloud water, rain water and ice mixing ratios, temperature excess, cloud top height and radar reflectivity are under the strong influence of the parameters of entrainment, amplitude of initial vertical velocity and forced vertical velocity. The most visible influence is that of forced vertical velocity on the ice content. The model values agree well with observations in one case for selected dynamical conditions. © 1989 Springer-Verlag.