ИСТИНА

Since 2010, more than one half of Earth population lives in urbanizes areas. So, the problem of land-use and microclimate changes in city area becomes more important in the context of inhabitants‘ long-term quality of life. The heat island for cities in tropical and temperate latitudes by now has been studied quite well. (Oke, 1987). According to (Oke, 1987; Ryu, Baik, 2012), one of the major reasons for its occurrence is considered to be more effective absorption and accumulation of solar heat in the town. However, the formation of heat islands in the polar cities is scarcely explored: such work was carried out only in towns in Alaska (Magee et.al., 1999). In Eurasian big cities principal possibility of formation of heat islands in the polar night isn‘t still described well. That‘s why in this report, we plan to discuss developed methodology of the UHI experimental research in big Russian Cities located to the north from the Arctic Circle and first results. During our field trips in 2014-2016 we used a different measurements techniques: 1. Installation of two automatic weather stations (AWS) in rural zone and city center. 2. Installation of small temperature sensors (iButton) network in the city and suburbs. 3. Regular car-based temperature sounding of the city with AWS (on photo). 4. Using MTP-5 microwave temperature profiler. Analysis of the collected data showed the existence of significant UHI with the difference between city center and surrounding landscape up to 5-8ºC