The behavior of a hailstone in a forced 1-D Cb cloud model

Abstract

A forced time-dependent 1-D model of Cb cloud is used to investigate the behaviour of injected hailstones. The final hailstone radii and trajectories are calculated for three initial parameters: the initial hailstone radius, the initial hailstone density and the concentration of cloud droplets. The hailstone growth is treated as a unique process with dry, wet and melting regime. It is shown: 1) For a shallow Cb cloud with a small precipitation zone in the cloud base region the hail growth time is significantly longer than in the case without a forced lifting component. Further the recycling mechanism with/without falling down of the hail occurs. 2) For the high Cb cloud the hail growth time is longer and no recycling occurs in the case with a forced lifting component. 3) The final hailstone radius change is relatively small. © 1989 Springer-Verlag.