A short overview of methane and carbon dioxide sinks and sources estimates for Western Siberia based on observations and modeling studies is presented. A new framework for these estimates involving satellite observations and regional atmospheric modeling of high resolution is suggested. This approach is based on coupled atmosphere-land surface modeling of high resolution (up to several kilometers) for current climate conditions and on the development of relevant physical and biogeochemical models minimizing the discrepancy between modeled atmospheric greenhouse gases concentrations and those retrieved from satellite data. With this aim, the mesoscale non-hydrostatic three-dimensional atmospheric model NH3D_MPI of high resolution (up to 1 km) is coupled with land surface model including along with heat and moisture transfer in plants and soil parameterizations for carbon dioxide related surface processes and methane emission from bogs and thermokarst lakes. Initial, boundary conditions and reference state variables for this model are extracted from regional reanalysis for Western Siberia, produced by atmospheric model WRF.

Ключевые слова: methane, carbon dioxide, sinks and sources, modeling, regional reanalysis, satellite observations