Sentences with phrase «emission temperature»
Emission temperature refers to the temperature at which an object emits or gives off heat or light. It is the temperature at which the object radiates energy in the form of electromagnetic waves. Full definition
The spectrally averaged effective emission temperature of the earth is about 252 K, which corresponds to the physical temperature near the 6 km level.
realclimate.org
What's more, since the albedo increases substantially, the total greenhouse effect can be thought of as providing even more than 33 K of warming relative to Earth's blackbody emission temperature.
Keep in mind that GHGs are fixed - quantum - e-line-emitters, and each line has a corresponding peak black body emission temperature related directly to its frequency and inversely to wavelength.
Equation 1 implies a value of T e = 254 K for the terrestrial emission temperature, whereas the observed global mean surface temperature is T ≈ 288 K.
Thus, given the height and value of the emission temperature, we can get a simple estimate for the surface temperature: 255K + 5.5 km * 6K / km = 288K (= 15oC; close to the global mean estimated from observations given by NCDC of ~ 14oC).
In 2) i wanted to discuss the different forcing efficacies of solar shortwave compared to anthro fossil carbon combustion upon global average surface temperature, rather than the emission temperature at top of atmosphere
S at Earth's orbit averages 1367.6 Watts per square meter, the Earth's albedo is about 0.3 (assume this is exact for the moment), and sigma has the value 5.6704 x 10 ^ -8 in the SI, which gives an emission temperature for Earth of 254.9 K.
Its emission temperature creates radiation by the Stefan - Boltzmann fourth - power law.
where Ts and Te are the surface (288 K) and emission temperature (255 K), respectively.
Charney sensitivity is less than half of the 3.3 K mid-range estimate in the CMIP3 and CMIP5 general - circulation models, distorted as they are by the long - standing misallocation of all 33 K of the difference between today's temperature and emission temperature to greenhouse - gas forcings and consequent feedbacks.
To show how official climatology's grave error arose, we shall study how it has been apportioning that 33 K difference between today's temperature and emission temperature.