Modeling the influence of the intensive crystallization level height on the cumulonimbus cloud parameters

The importance of information on the ice particles amount and formation height in understanding the processes taking place in a cumulonimbus cloud is shown. In radar meteorology the intense crystallization level NIC is one of the criteria for the cloud transition to the thunderstorm activity stage. Modeling of a cumulonimbus cloud parameters with the intensive crystallization level height change has been carried out. With an increase in NIC there is a decrease in the hydrometeors number entering the crystallized area, an increase in the area volume with the highest water content in the cloud center, its rise, and a change in the orientation of the large drops «nursery» with a water content of more than 8 g/m3 from horizontal to vertical shape. The dependence of the hydrometeor size in the central part of the cloud jet and the lifetime on the NIC level has been detected.