A variational approach to environmental and climatic problems of urban agglomerations

[摘要] We discuss some aspects of the development of a variational approach to study the dynamics of climatic and ecological systems under intensive actions of natural and anthropogenic origin. The variational principle essentially represents a versatile tool to create a consistent modeling technology based on models of processes coupled with available observational data. The basic entities included in the formulation of the variational principle are models of processes; data and models of observations; target criteria for forecasting; a priori information about all the required elements of the system. We develop a set of mathematical models combined within the framework of the variational principle. They describe the dynamics of the atmosphere and water bodies in conjunction with a thermally and dynamically heterogeneous surface of the Earth; the hydrological cycle, moisture in the atmosphere and the soil; radiation transfer in the system of the atmosphere and the underlying surface; and transport and transformation of various substances in gaseous and aerosol states in the atmosphere. As an example, we demonstrate the results of calculations performed with a set of numerical models adapted to the conditions of a Novosibirsk city agglomeration. The results of scenario calculations on the formation of mesoclimates and quality of the atmosphere for the typical conditions of Siberian cities are presented.

[发布机构] Institute of Computational Mathematics and Mathematical Geophysics, SB RAS, 6, Akademika Lavrentyeva pr., Novosibirsk; 630090, Russia^1;Novosibirsk State University, 2, Pirogova str., Novosibirsk; 630090, Russia^2

[效力级别] 计算机科学

[关键词] Anthropogenic origin;Heterogeneous surface;Hydrological cycles;Modeling technology;Transport and transformation;Urban agglomerations;Variational approaches;Variational principles