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EN
The paper presents results of investigations on microclimate over one of the largest artificial water reservoirs in the world - Ust-Ilimsk on the Angara in Russia. It is located in the western edge of the Central Siberian Upland in the northern part of Irkutsk Oblast. The area of reservoir at a normal level of water damming (296 m a.s.l.) amounts to 1873 km2, the capacity of stored water - 59,4 km3, and the shoreline length is equal to 2384 km. The evaluation of the influence of the water reservoir on local climate was based on the analysis of data collected over many years measurements of a series of particular elements of the climate and carried out in the direct neighbourhood of the reservoir before (1936-1975) and after its construction in 1977. From the research the results show that the Ust-Ilimsk water reservoir distinctly influences the local climate of adjacent areas. The differences are mostly connected with the increase in total radiation and changes in the radiation balance of the reservoir, and the larger heat capacity of the water mass in comparison to land. As data from meteorological stations indicate, the climate in the neighbourhood of this water reservoir gains many new features and generally becomes milder. The average annual increase in air temperature over the reservoir shores reached 1.3°C, whereas with in land it was only 0.4°C. At every meteorological station (inshore and continental), in the summer period and during the whole year as well, the average sum precipitation decreased by 7-14%. In the winter, when polynya exist, the number of days with fogs increases over the reservoir. Fogs in the shore zone of the Ust-Ilimsk reservoir delay the coming of frosts by 1-2 weeks.
EN
The effect of aircraft emissions on the global climate is a serious long-term environmental issue faced by the aviation industry. As the number of passengers grows, so does the use of jet fuel and the emission of greenhouse gases (GHG). This may destabilize the world’s climatic systems, which will consequently lead to global, regional and local environmental, economic and social damage. The Intergovernmental Panel on Climate Change (IPCC) estimates that aircrafts are currently responsible for 3.5 % of the total anthropogenic greenhouse effect. To avoid the negative consequences of climate change, it is necessary to fully understand factors affecting this problem locally and develop methods of mitigating airport climate effects. This article describes and analyses calculations of radiative forcing of aircraft emissions and the radiative impact of clouds in the surrounding area of the Lviv airport. The calculated values were verified against temperature data for the city and at the airport provided by meteorological authorities.
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