First results of measuring temperature in snow cover at a winter search site in Irkutsk

Abstract

The article is devoted to the first results of monitoring the temperature in the snow cover, the height of the snow cover and the atmospheric air temperature in Irkutsk. The results were obtained on the basis of exploratory scientific and organizational research that began in 2021 at the INRTU sites using an autonomous automatic software and hardware complex developed at the Institute for Monitoring Climatic and Ecological Systems of the SB RAS. It has been established that there is a change in temperature in the snow cover at the same height during the day, while in the height range from 0 to 15 cm (0 cm is the underlying base) temperature fluctuations between min and max are insignificant compared to temperature fluctuations in the upper layers snow cover. It is shown that graphically changes in temperature in the snow cover at altitudes that are closer to the atmospheric surface of the snow cover have more pronounced amplitude daily cycles, in contrast to changes at low altitudes. A linear correlation has been established between air temperature and temperature at various heights in the snow cover; the correlation coefficient decreases with decreasing heights in the snow cover, provided that the maximum height of the snow cover is constant, for example, during the day. The phenomenon of cooling of the surface of the snow cover at certain hours during the day, when the temperature of the snow-atmospheric surface is lower than the air temperature, is shown. We note that actual values obtained in autonomous automatic real-time mode, such as air temperature, temperature and snow depth, may have practical significance and over time, with the development of digitalization, may be in demand for managing the urban ecosystem of the city and/or individual territories