The article is devoted to a detailed analysis of the impact of climatic changes on the main types of the plain Crimea regional ecosystems, taking into account the regional features of atmospheric circulation in the Northern Hemisphere. The paper highlights and describes the characteristic features of the distribution of the air temperature field within the landscape contours of the Crimean Peninsula for each circulation epoch and period of the Northern Hemisphere. For the main types of regional ecosystems (landscapes) of the plain Crimea, the average values of air temperature by circulation epochs and periods, the values of the standard deviation and the factor entropy of the air temperature values were calculated. As a result of the work, the main regularities of the dynamics of air temperature in the main types of regional ecosystems with the change of circulation epochs and periods of the Northern Hemisphere have been established. The study of the spatial and temporal distribution of the standard deviation and entropy of air temperature values allows us to make a conclusion about the formation of strategies for the development or stabilization of the main types of regional ecosystems of the plain Crimea.