The global average temperature of the earth is 57*F.
The term "globe temperature" refers to the temperature recorded by a globe thermometer, which consists of a 6-inch hollow copper spherical with a matte black exterior and a thermometer sensor in its center. While the temperature of the globe is being measured, the globe thermometer may not be protected from direct contact with radiant heat. Heat stress meters that are readily accessible on the market can measure the earth's temperature.
"Tg" stands for "globe temperature," which is the temperature recorded by a thermometer with its sensor housed inside a matte-black globe that is exposed to radiant heat, such as a Vernon Globe or an equivalent.
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