151st meeting of the seminar
«Mathematical modeling of geophysical processes: direct and inverse problems»
The seminar is devoted to the consideration of various aspects of mathematical modeling of physical processes in the atmosphere, hydrosphere and active layer of land, associated with solving problems arising in the study of the problems of climate change and the natural environment.
Seminar Organizing Committee
Leaders: |
Doctor of Physics and Mathematics A.V. Glazunov (Marchuk Institute of Numerical Mathematics of RAS) Doctor of Physics and Mathematics I.A. Repina (A.M. Obukhov Institute of Atmospheric Physics of RA) Doctor of Physics and Mathematics V.M. Stepanenko (RCC MSU, Geographical Faculty of Moscow State University) |
Secretary: |
A.V. Debolsky (RCC MSU, A.M. Obukhov Institute of Atmospheric Physics of RAS). |
PROGRAM
17:15
Yu.V. Mukhartova | MSU |
D.L. Tarasov | MSU |
A.V. Ol'chev | MSU |
Yu.A. Kurbatova | Severtsov Institute of Ecology and Evolution of the Russian Academy of Sciences |
Modeling vertical and horizontal flows of carbon dioxide between a raised bogs and the atmosphere
Bogs play a significant role in the formation of local and regional weather and climatic conditions, affecting the radiation, heat, water and carbon balance of the earth's surface. A wide range of experimental methods and model approaches of varying degrees of complexity and scale are used to monitor CO2 fluxes and describe its transport in the atmosphere. Recently, researchers have been particularly interested in a quantitative assessment of the impact of horizontal heterogeneity of vegetation cover and topography on greenhouse gas fluxes on a local and regional scale. This is necessary for a more accurate assessment of the contribution of vegetation to the integral fluxes of greenhouse gases over an inhomogeneous underlying surface, as well as for the interpretation of the measured flux data and the assessment of possible errors of these measurements. Within the framework of this study, a three-dimensional model of the transport of greenhouse gases in the surface layer of the atmosphere between the heterogeneous underlying surface and the atmosphere was developed. The model contains a dynamic part for the velocity components based on the “one and a half” closure of the system of averaged continuity and Navier-Stokes equations taking into account the resistance of vegetation, as well as a “biological” part, which includes the diffusion-advection equation for CO2 concentration, parameterization of the photosynthesis rate, and also the respiration of vegetation and soil. Using this model, the spatial heterogeneity of carbon dioxide fluxes was determined for the "Staroselsky mokh" raised forest bog (Tver region) selected as an object of study, and the representativeness of measurements of greenhouse gas fluxes carried out in the swamp by the method of turbulent pulsations was estimated.
The seminar will be held in the form of a webinar on the Zoom platform.
Topic: семинар "Математическое моделирование геофизических процессов: прямые и обратные задачи".
Time: December 09, 2021 05:15 PM Moscow (GMT+3)
Join Zoom Meeting: https://us02web.zoom.us/j/82525788981?pwd=aEpIS2dOTUhyYmZSS0ZkMEh2aVlVdz09
Meeting ID: 825 2578 8981
Passcode: 526114
Video recordings of the seminar are available on our youtube channel.
For communication on all issues related to the work of the seminar, please contact the academic secretary Andrey Vladimirovich Debolsky at and.debol@srcc.msu.ru