Assessment of bioclimatic indices in the territories of the subarctic and continental climatic zones of the Krasnoyarsk Territory

Abstract

Introduction. The information content of the used bioclimatic indices of comfort/discomfort is different. Goal is an assessment of the significance of bioclimatic indices in characterizing the risk to public health in the territories of the climatic zones of the Krasnoyarsk Territory. Materials and methods. In the subarctic and continental climates, the risk of body cooling and frostbite in exposed areas of the body was assessed. By temperature, wind speed and relative humidity for 2010-2019. The integral indicator of cooling conditions, wind-cold index, effective temperature and equivalent effective temperature were calculated. Results. According to the integral indicator of the conditions for cooling the body in the subarctic climate, the risk to health for 8, in the continental climate - 6-7 months, according to the wind-cold index - 6-7 and 4 months. In terms of effective temperature, there was no risk in both climates for 10 and 12 months. The equivalent effective temperature determined the risk of frostbite within 5 and 2 months. The integral indicator of the cooling conditions of the body shows the risk to human health in terms of the permissible degree of cooling and the rate of normalization of the thermal state; equivalent effective temperature - about the risk of cooling with insufficient thermal protection of the body, which determines the period of health risk according to the criterion up to 11-10 months in every climate zone. Limitations. Assessment of the impact of weather factors shows the need to use bioclimatic indices that most fully reflect the negative impact of a cold environment; the definition of the adequacy of the habitat is determined not only by the risk of frostbite, but also by the discomfort of the environment, which requires the use of means of warming the body. Two-parameter indices do not take into account the role of air humidity. Conclusion. The definition of cold indices depends on the climatic zone. The integral indicator of body cooling conditions is more informative in relation to the wind-cold index, which is preferable in practical use. Equivalent effective temperature determines the risk of frostbite and cooling of the body. Its use in climatic zones with a predominance of low temperatures is of social and hygienic significance.