Determination of periods of risk of cold exposure in climatic zones of the Krasnoyarsk Territory by the degree of danger

Abstract

The duration of the periods of risk to the health of the population of the influence of cold in combination with wind in the territories of the Krasnoyarsk Territory was assessed according to the integral indicator of the conditions of the body’s cooling (IPOOO). Health risk based on average monthly temperatures and wind in the subarctic (No. 1) zone 8 months. (two critical, 6 moderate), territories No. 2 (Krasnoyarsk) and No. 3 (Minusinsk) — 6 and 5 months. (moderate). When analyzed by Q25-Q75 intervals, the duration of the risk periods increased by 1–2 months. In the first territory, the risk of critical cooling of the body increased by 1 month; the rest are moderate. At the minimum temperature and maximum wind in the subarctic zone, the period of critical risk of cooling the body is 5 months, catastrophic — 2. In the region of Krasnoyarsk 2–3 months, Minusinsk 3 months. the risk is critical. Determination of the IPUOO based on the data of average monthly temperatures and wind speed does not allow to fully determine the risk of cold influence; analysis by indicators of ranges of 25 and 75 quartiles in the conditions of three territories of the Krasnoyarsk Territory indicates its presence within 1–2 months, and also indicates a more significant degree of risk. In conditions of minimum temperatures and maximum wind, the period of risk of cold influence lengthens to 9–10 months a year, the nature of the degree of risk increases significantly, including critical and catastrophic. This must be taken into account when determining the length of time for safe work in an open area. With extreme indicators of the state of physical factors in an open area, the «contribution» to the value of the IPOOO wind speed increases more significantly: the minimum temperature is 1.2–1.3 times, the maximum wind is 3.1–5.1 times.