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Numerical Study of the Dynamic, Thermodynamic and Microstructural Parameters of Convective Clouds

Natural Science 2018年第2期10卷 63-69页

作者： Vitaly A. Shapovalov Alexander V. Shapovalov Boris P. Koloskov ruslan kh. kalov Valery N. Stasenko Department of Cloud Physics High-Mountain Geophysical Institute Nalchik Russia Autonomous Nonprofit Organization “Agency of Atmospheric Technologies” Moscow Russia State research center on Space Hydrometeorology PLANETA Moscow Russia

On the basis of a three-dimensional non stationary model of a convective cloud with detailed description of dynamic, thermodynamic and microphysical processes, numerical experiments were conducted to study the formation of parameters of convective clouds under unstable stratification of the atmosphere. Numerical experiments have been carried out to study the formation of convective processes in the atmosphere. The thermo hydrodynamic parameters in the zone of a thunderstorm cloud are determined, and regions with a vortex motion of air are identified. The main flows feeding the convective cloud in the mature stage are determined. Due to the means of visualization, the areas of formation and growth of precipitation particles are identified. In a three-dimensional form, the interaction of dynamic and thermodynamic processes is analyzed. The interaction of fields is manifested in the form of deformation of fields of thermodynamic parameters under the influence of dynamic processes. Trajectories of air streams around a cloud and the trajectories of drops in a cloud are determined. The results of numerical experiments confirm that dynamic processes significantly influence the formation of fields of thermodynamic parameters in the cloud, which also determine the course of microphysical processes and the nature of the growth of precipitation particles.

关键词： Numerical 3D Modeling Convective Processes in the Atmosphere Thermodynamic Parameters Microstructural Parameters Velocity Field of Air Flow Particles Trajectories

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Mathematical Modeling of the Influence of the Wind Field Structure in the Atmosphere on the Cloud Formation Processes

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Atmospheric and Climate Sciences 2018年第1期8卷 84-96页

作者： Boris A. Ashabokov Lyudmila M. Fedchenko Alexander V. Shapovalov kh.zhbara M. kalov ruslan kh. kalov Alla A. Tashilova Vitaly A. Shapovalov High-Mountain Geophysical Institute Nalchik Russia Institute of Computer Science and Problems of Regional Management Kabardino-Balkarian Research Center Russian Academy of Sciences Nalchik Russia

The state of the physics of convective clouds and cloud seeding is discussed briefly. It is noted that at the present time there is a transition from the stage of investigation of “elementary” processes in the clouds to the stage of studying the formation of macro- and microstructural characteristics of clouds as a whole, taking into account their system properties. The main directions of the development of cloud physics at the upcoming stage of its development are discussed. The paper points out that one of these areas is the determination of the structure-forming factors for the clouds and the study of their influence on their formation and evolution. It is noted that one of such factors is the interaction of clouds with their surrounding atmosphere, and the main method of studying its role in the processes of cloud formation is mathematical modeling. A three-dimensional nonstationary model of convective clouds is presented with a detailed account of the processes of thermohydrodynamics and microphysics, which is used for research. The results of modeling the influence of the wind field structure in the atmosphere on the formation and evolution of clouds are presented. It is shown that the dynamic characteristics of the atmosphere have a significant effect on the formation of macro- and microstructural characteristics of convective clouds: the more complex the structure of the wind field in the atmosphere (i.e., the more intense the interaction of the atmosphere and the cloud), the less powerful the clouds are formed.

关键词： Wind in the Atmosphere Wind Field Structure Interaction with Clouds Mod-eling System Properties of Clouds Interaction of Clouds with the Atmosphere Three-Dimensional Cloud Model

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