Sentences with phrase «effective blackbody temperature»

When I first studied engineering heat transfer in the 1970s, the texts said to use for the clear night sky an «effective blackbody temperature of about -20 C (253K).

The Earth's surface temperature is 35 K warmer than its effective blackbody temperature, because of the presence of clouds and GHGs or called the natural greenhouse effect.

Not exact matches

The difference in radiant flux will be smaller between 222 K and 255 K, and larger between 288 K and 321 K, and it will take a greater GHE TOA forcing to reduce the effective radiating temperature (the temperature of a blackbody that would emit a radiative flux) at TOA from 288 K to 277 K as it would to reduce it from 277 K to 266 K, etc..

However, since the Earth reflects about 30 % of the incoming sunlight, the planet's effective temperature (the temperature of a blackbody that would emit the same amount of radiation) is about − 18 °C, about 33 °C below the actual surface temperature of about 14 °C.