A variational approach to environmental and climatic problems of urban agglomerations

International Conference and Early Career Scientists School on Environmental Observations, Modelling and Information Systems

生态环境科学;计算机科学

Penenko, V.V.^1,2 ; Tsvetova, E.A.^1

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

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

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/48/1/012020/pdf
DOI  :  10.1088/1755-1315/48/1/012020

来源: IOP

【 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.