轉文並補充AI OVERVIW【研之有物】天氣太熱減少生產力?用科學指標實際算給你看 the wet bulb globe temperature (WBGT) WBGT 結合了空氣溫度、濕度、風速和輻射熱(陽光),計算出真實的熱風險,尤其是在陽光直射下,因此對於體育運動、軍事和工業環境中的安全至關重要。
Wet-bulb globe temperature (WBGT) is a specialized, comprehensive measure of environmental heat stress on the human body. Unlike standard thermometers, WBGT combines air temperature, humidity, wind speed, and radiant heat (sunlight) to calculate the true heat risk, especially in direct sunlight, making it critical for safety in sports, military, and industrial settings.
Key Aspects of WBGT:
What it Measures: It calculates the heat stress on a human, accounting for how effectively sweat can evaporate to cool the body.
Components: It uses three sensors: dry-bulb (actual air temperature), natural wet-bulb (humidity + wind), and black globe (radiant sun heat).
Usage: Used by authorities like OSHA and in sports to determine when conditions are too dangerous for activity, often requiring work breaks or practice modifications.
WBGT vs. Heat Index: While the heat index only measures temperature and humidity in the shade, WBGT offers a more accurate reading of "real-world" conditions by including wind and direct sunlight.
Why WBGT is Important: When the WBGT reaches high levels (e.g.,
or higher), it is unsafe for strenuous outdoor activities, requiring significant reductions in activity and increased hydration. It is widely considered the best metric for preventing heat-related illnesses.
Wet-bulb globe temperature - Wikipedia
The wet-bulb globe temperature (WBGT) is a measure of environmental heat as it affects humans. Unlike a simple temperature measure...
Wikipedia
Wet Bulb Globe Temperature - National Weather Service
Wet Bulb Globe Temperature (WBGT) is a measure of the heat stress in direct sunlight, which takes into account: temperature, humid...
National Weather Service (.gov)
What is Wet Bulb Globe Temperature (WBGT)? - Nicholas Institute
WBGT is a combination of three measurements: Air temperature is measured by a typical outdoor thermometer. Natural wet bulb temper...
Nicholas Institute for Energy, Environment & Sustainability
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