Facial Cooling During Cold Air Exposure

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Authors
  1. Tikuisis, P.
  2. Osczevski, R.J.
Corporate Authors
Defence R&D Canada - Toronto, Toronto ONT (CAN)
Abstract
A dynamic model of facial cooling was developed in conjunction with the release of the new Wind Chill Temperature (WCT) index. Whereby the WCT provides wind chill estimates based on steady state considerations, the dynamic model can be used to predict the rate of facial cooling, and particularly the onset of freezing. In the present study, the dynamic model is applied to various combinations of air temperature and wind speed, and predictions of the resultant steady state cheek skin temperatures are tabulated. Superimposed on these tables are times to a cheek skin temperature of 10°C, which has been reported as painful, and times to freezing. For combinations of air temperature and wind speed that result in the same final steady state cheek temperature and are therefore equivalent in terms of wind chill, the initial rate of change of skin temperature is higher for those combinations having higher wind speeds. This suggests that in short exposures, high winds combined with relatively mild temperatures might be perceived as more stressful than light winds with low temperatures that result in the same wind chill. This might also help explain why some people prefer cold climates with low winds, to milder, but windier climates.

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Keywords
Tissue freezing;Cheek;Facial cooling
Report Number
DRDC-TORONTO-SL-2002-052 — Scientific Literature
Date of publication
01 May 2002
Number of Pages
7
Reprinted from
American Meteorological Society, 2003, p 927-933
DSTKIM No
CA023730
CANDIS No
521117
Format(s):
Electronic Document(PDF);CD ROM

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