What does the globe temperature represent in WBGT?

What does the globe temperature represent in WBGT?

• A. Ambient air temperature
• B. Radiant heat load from the environment
• C. Humidity level
• D. Wind speed

Answer: (B)

Globe temperature in WBGT represents the radiant heat load from the environment. A black globe thermometer absorbs solar and infrared radiation from surrounding surfaces and the sun, so its temperature rises with how much radiant heat the body would receive. This measurement captures radiant heat exposure, distinct from ambient air temperature (which is the dry-bulb reading) or humidity and wind effects (which are reflected mainly by the wet-bulb sensor and by how air movement influences heat exchange). In bright sun, the globe temperature can be higher than the air temperature, signaling greater radiant heat stress.

Globe temperature in WBGT represents the radiant heat load from the environment. A black globe thermometer absorbs solar and infrared radiation from surrounding surfaces and the sun, so its temperature rises with how much radiant heat the body would receive. This measurement captures radiant heat exposure, distinct from ambient air temperature (which is the dry-bulb reading) or humidity and wind effects (which are reflected mainly by the wet-bulb sensor and by how air movement influences heat exchange). In bright sun, the globe temperature can be higher than the air temperature, signaling greater radiant heat stress.