Evaluation of conditions under which unprotected parts of the human body may freeze in urban air during winter

Relationships between the human skin temperature and a combination of air temperature and wind speed are obtained. These relationships have been used to estimate the climatic conditions leading to the possible freezing of unprotected parts of the face in urban air during winter.The possibility of utilizing relationships governing the heat balance of man, including nomograms and graphs constructed for estimating climatic conditions in urban areas, for isolating zones of different functional importance in the boundaries of a subdivision and of a city, and for estimating the efficiency of various architectural designs in improving the microclimate, are discussed.Originally published inTrudy Main Geophys. Obs. 248, 1969, pp. 74–81. Translated by A. Nurklik, Atmospheric Environment Service, Toronto, Canada.