WBGTindice

WBGTindice refers to the Wet-Bulb Globe Temperature (WBGT) index, a widely used measure of heat stress that combines several environmental factors to estimate thermal strain on the human body. The index integrates dry-bulb air temperature, natural wet-bulb temperature, and globe temperature to reflect air temperature, humidity, wind speed, and solar radiation.

Calculation varies by exposure context. In outdoor environments with solar radiation, WBGT = 0.7 times the natural wet-bulb temperature plus 0.2 times the globe temperature plus 0.1 times the dry-bulb temperature. In indoor or shaded outdoor settings, WBGT = 0.7 times the natural wet-bulb temperature plus 0.3 times the globe temperature. Tnwb is measured with a natural wet-bulb thermometer, Tg with a black globe thermometer, and Ta is the dry-bulb air temperature. WBGT is typically determined with dedicated meters or multi-parameter sensors.

Applications of the WBGTindice span occupational health, sports science, and military contexts. It informs work-rest schedules, hydration strategies, and clothing choices to mitigate heat-related illness. Standards and guidelines, such as ISO 7243 and various occupational health frameworks, reference WBGT thresholds for different activity levels and acclimatization statuses.

Limitations include sensitivity to clothing, metabolic rate, and exercise intensity, as well as variability with wind and radiation conditions. The WBGTindice should be used alongside other indicators and local guidelines to assess heat stress risk for a specific task and population.