Geographic information system for hydrodynamic weather forecast accuracy increasing for Belarusian territory based on Earth remote sensing data and the objective analysis of meteorological fields

   The article presents a complex geoinformation system for the validity of hydrodynamic weather forecasts improving, including updated and promptly updated on the basis of the remote sensing data spatial distributions of the physical parameters of the underlying surface, the sets of the parameterizations of atmospheric processes at the grid scale and blocks of the data assimilation from ground-based meteorological, aerological and radar observations adapted for the territory of Belarus. It is shown that the data assimilation of meteorological and aerological stations allows reducing the
probability of absolute errors in surface pressure forecast ≥ 3 hPa by 5 %. The assimilation of radar data reduces the mean-square error of surface wind speed forecast by 0.33-0.74 m/s at an advance time within 24 h, and allows more accurate forecasting of the territorial distribution of convective systems and precipitation areas at early hours of the forecast (up to 12 h). The clarification of the land use structure and underlying surface parameters on the base of operational satellite data provides an increase in the validity of the short-term hydrodynamic forecast of surface air temperature in Belarus by 4-9 % with maximum manifestation in Minsk, Gomel and Grodno regions in the cold period of a year.

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