GEOLINKS International Conference 2019, Book 3
ECOLOGY AND ENVIRONMENTAL STUDIES
HIGH-RESOLVING MODELING AND FORECAST OF REGIONAL DYNAMIC AND TRANSPORT PROCESSES IN THE EASTERNMOST BLACK SEA BASIN
DSc. Demuri Demetrashvili, Vepkhia Kukhalashvili
The article deals with the simulation and short-range forecast of the current, temperature and salinity fields as well as contamination distribution processes in the easternmost part of the Black Sea covering the Georgian Black Sea coastal zone and surrounding water area. These studies are carried out on the basis of the coupled high-resolution Black Sea regional dynamics and transport models which are components of the regional forecasting system. By-turn, this system is one of the parts of the Black Sea basin-scale Nowcasting/Forecasting System. The regional model of the Black Sea dynamics developed at M. Nodia Institute of Geophysics of Ivane Javakhishvili Tbilisi State University is nested in the basin-scale model of the Black Sea dynamics of Marine Hydrophysical Institute (MHI, Sevastopol). Atmospheric forcing is provided by the atmospheric limited area model ALADIN adapted to the Black Sea region. Equations of the mathematical models involved in the forecasting system are solved by finite-difference methods using two-cycle splitting method with respect to physical processes, coordinate planes and lines. 3D dynamic fields – the current, temperature and salinity, also pollution concentration fields are calculated on a uniform grid with the horizontal grid step 1 km. Some results of 3-day forecast of dynamic fields are compared with the results obtained from MHI model using coarse grid and with observational data.
Numerical modeling, boundary conditions, forecasting system, salinity field, satellite data.