Long-term dynamics of thermal comfort in the territories of the Krasnoyarsk region climate belts

Abstract

Health risk assessment in the general population in different climate zones of the Krasnoyarsk Territory by the equivalent effective temperature (EET). The average monthly EET according to Missenard was calculated, their dynamics and health risk were assessed within two periods of determining climate norms for the last 10 years of each period (1961–1990 and 1991–2020). Within the period of 1991–2020 compared with the previous period in the subarctic climate in the summer months, EET had positive values (in opposition of 2 months in 1961–1990), increased in April by 7.87 °С (p = 0.0004), in June by 5.56 °С (p = 0.019) and October by 3.2 °С (p = 0.038); in continental climate zone — in April at 5.23 °С (p = 0.0001), in June at 3.88 °С (p = 0.0009) and in August at 1.32 °С (p = 0.023). Living conditions of the population have become more favorable, the nature of the health risk has changed. In the subarctic climate, the changes in uncomfortable conditions occurred according to the criteria of «frostbite threat» — «cold» (5 months against 6 months in the first period), «cool» — «moderately cool» (2 months against 3 months), «comfort, moderately warm. «In the continental climate zone, the changes were noted according to the criteria of «moderately warm» — «very cool» (7 months against 5 months). In both climate zones, positive changes have caused a decrease in health risk according to two criteria («the threat of frostbite»; «very cold»); there was a shift from the risk assessed as «cold»towards «comfort, moderately warm».