Operative temperature

From Glossary of Meteorology

operative temperature

In the study of human bioclimatology, one of several parameters devised to measure the cooling effect of the air upon a human body. It is equal to the temperature at which a specified hypothetical environment would support the same heat loss from an unclothed, reclining human body as the actual environment.

In the hypothetical environment, the wall and air temperatures are equal and the air movement is 7.6 cm s-1. From experiments it has been found that
where Tr is the mean radiant temperature, Ta the mean air temperature, Ts the mean skin temperature (all in degrees Celsius), and v the air speed in centimeters per second.
Compare cooling power, cooling temperature, effective temperature.

Newburgh, L. H. 1949. Physiology of Heat Regulation and the Science of Clothing. W. B. Sanders, Philadelphia, . p. 281.

Buettner, K. J. K. 1951. Compendium of Meteorology. p. 1115.