ИСТИНА

Generation of Urban Heath Island (UHI) is considered as one of the major problems in the XXI century. Before, to the UHI problem in the Arctic it had not been paid enough attention. To date, there are many studies that discuss the generation of heat islands in big cities located in the middle and low latitudes, and almost nothing is known about the UHI occurrence behind the Polar circle. However, heat islands in polar cities are fundamentally different from those at lower latitudes. North of the Polar Circle, the Sun is completely below the horizon in winter and there is no income of solar radiation during some period of time, called the polar night. The solar contribution to the UHI is negligible during the polar night. Here we analyze temperature data collected using a car in the two polar towns Kirovsk (67.62N, 33.67E) and Apatity (67.57N, 33.38E) and in the surrounding rural areas during the polar night. Our results show that temperature variations within and outside these cities are caused by either the local orographic effects, or physical condition of the atmospheric boundary layer.