ИСТИНА

The Arctic region stands out especially strongly on the background of climate change.According to fourth and fifth IPCC assessment report data, it is known that the rate of temperature increase in this region is higher than the average for the globe. Temperature as a climatic resource largely determines the conditions of human life and the possibility of economic development of territories. But not only temperature influences a person’s feeling of the environment and its comfort, therefore, bioclimatic indices are used to assess the impact of the environment on a person’s health and lifetime. The main characteristic of the environmental comfort is thermal comfort. Thermal comfort is a parameter of the feeling of comfort. In this condition the thermoregulatory system is at rest. A human feels comfortable. He is neither cold, nor hot. That is why an urgent issue in applied bioclimatology can be considered an assessment of thermal comfort conditions not only on average for a territory, but also for urbanized territories separately. On these territories the effect of urban heat islands strongly influences temperature increase in addition to general climate warming. In most cities, weather stations are located outside the city limits. These weather stations can not characterize the climate of the cite. Aims of the study: ● Obtaining trends of temperature and bioclimatic indices of environmental comfort in the period from 1966 to 2017 for the Arctic region as a whole and for Arctic cities ● Study of cities for their belonging to different local urban climatic zones (LCZ) ● Modeling the dynamics of thermal comfort conditions in Arctic cities in the period from 1966 to 2017 To assess changes in comfort in the Arctic region, three of the most common bioclimatic indices of environmental comfort were chosen. Figure 4. Terms contributing to the eddy enstrophy balance (using Ertel’s potential vorticity without the perturbation of the vertical component of the wind speed – blue lines, with the pertorbation – green ones) at 50 km for January. The territory that was included in the Arctic zone of the Russian Federation by decree of the President of the Russian Federation was chosen for the study. The following cities were chosen: Murmansk, Kandalaksha, Arkhangelsk, Naryan-Mar, Salekhard, Anadyr and Nadym, also included in the Arctic zone