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Unformatted text preview: Biometeorological Applications: Heat Stress Index • Developed by R.G. Steadham in 1983 • Two Factors: Temperature and Humidity • Based on evaporative cooling process • Humidity slows evaporation down and body gets warmer as a result; if in very high humidity there is heat related illness because body can’t regulate its temperature through sweat/ evaporation. • 1 st sign of heat related illness is body stops sweating and body temperature sky rockets. Wind Chill Index • Developed for polar scientists in 1940s • Updated by NOAA/ National Weather Service in 2001 for a more meaningful use worldwide • Two Factors: Air Temperature and Wind Speed • Other important factors: Relative humidity/solar radiation • Clothing and physical (body) dependent 80-85% body heat is lost through the head Heat stress index Lecture 1-31-08 GRG 301K...
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This note was uploaded on 03/19/2008 for the course GRG 301K taught by Professor Kimmel during the Spring '08 term at University of Texas.
- Spring '08