|
The paper presents some results of a numerical scenario on pollutants dispersion in the south of the Lake Baikal region. We used the scenario approach and simulated the case corresponding to the late fall or early winter. At this time, in Eastern Siberia, low temperatures are established in the atmosphere and on the ground. However, Lake Baikal is not yet covered with ice: according to climatic data, ice cover appears only in January. Therefore, a situation arises when large temperature gradients between land and lake form in vast areas of the region. Under such conditions, we examined the formation of atmospheric circulation in the Baikal region. To describe the meteorological processes, we use a mesoscale model for the dynamics of the atmosphere, developed in ICMMG SB RAS. Performing the scenario, we use the results of the COSMO-SIB6 predictive mesoscale model to specify the initial distributions of meteorological fields. Based on hydrodynamic processes, we also simulated the processes of impurity propagation from the sources of the Irkutsk-Cheremkhovo industrial hub and other major industrial centers in the region. Under the conditions of the considered winter scenario with north-west background flow, the calculation results showed that the lightweight impurities from high sources at the enterprises of the region not only from Irkutsk, but also from more distant enterprises of the Angarsk complex can reach the water area of Lake Baikal.
|
