Sentences with phrase «of effective emissivity»
«The new definition of effective emissivity of non-isothermal rough surface and its approximate expression for continuous canopy vegetation» Chen IEEE explore
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The use of effective emissivity already accounts for the greenhouse effect.
Not exact matches
The effective emissivity from the surface of the ocean above that little millimeter or two of air gap is about 0.857, on average, so the oceans would require a 2.18 instead of 5.35 as the multiplier resulting in 1.5Wm - 2 at the surface.
Now I did use the word «averages over the planetary surface», but these obviously weighted averages - the effective temperature is weighted by the fourth power of itself, and the effective emissivity is weighted by the forth power of local temperature.
The precise method of calculating the effective absorptivity or emissivity for a gas body of finite dimensions is quite complex but for engineering calculations an approximate method developed by Hottel (1) yields results of satisfactory accuracy.
The Stefan - Boltzmann Law requires heat flux, the Stefan - Boltzmann constant, and the emissivity of the surface (or effective emissivity of a gas).
The precise method of calculating the effective absorptivity or emissivity is quite complex and is given in -(1) Trans.