«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).
17:15
 D.M. Ermakov IKI RAS, Kotel'nikov institute of radio engineering and electronics of RAS

Satellite microwave radiometry for regional hydrological cycle analysis.

In the report the possibilities of satellite microwave radiometry for solving the problems of analysis (monitoring parameters) of the regional hydrological cycle are considered and illustrated by specific practical examples. The general approach is to consider the components of the balance equation of total atmospheric moisture content over a given territory. Changes in this value are determined by two processes: advection (horizontal transport) of air masses of different humidities, and vertical exchange (between the atmosphere and the surface.

The practical possibilities of analyzing the components of this balance equation are determined by The progress of satellite radiophysical methods:

1. reconstruction of integral atmospheric moisture content fields over land;
2. reconstruction of effective fields based on the sequence of satellite observations of the water vapor advection velocity.

Due to this it becomes possible to calculate the vertical moisture exchange component integral on the considered territory and on the observation time interval, which for the analysis of the regional hydrological balance appears to be methodologically methodologically more justified than extrapolation of "instantaneous" satellite and/or "point intensity of precipitation and evaporation is methodologically justified than extrapolation of "instantaneous" and/or "point" satellite estimates. The developed methodology is proposed to for analysis of hydrological regime of large rivers (including forecast of strong floods) floods), drought and other extreme weather events. The proposed approach is illustrated in the report by examples of analysis of hydrological balance of Ob and Amur River watershed territories in comparison with available data hydrological stations and reanalysis data. Further ways and prospects of its development are discussed.

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: Mar 30, 2023 05:15 PM Moscow (GMT+3)

Meeting ID: 851 8621 0990

Passcode: 681133