Sentences with phrase «blackbody curve»

Now, if you reduce the surface temperature of 265K by an amount that's enough to fill in the hole at 15um (and the other smaller holes in CO2's lesser absorption bands) to make a smooth blackbody curve at a lower temperature the downward difference is the amount of greenhouse effect by all atmospheric CO2.

At CO2 absorption frequency of 15um the curve at 265K suddenly drops down sharply to follow the 225k blackbody curve.

Note that there is a distinct depression between 14μ and 16μ, but still a fair amount of energy there, but not as much as at around 13μ and 17μ, which approximate the blackbody curve.

Dave Springer says: May 10, 2011 at 8:55 am > IIRC the spectrum follows a 270K blackbody curve where the atmosphere is > IR transparent i.e. it «sees» the temperature of the ocean surface but in the > 15um region it drops down to follow a 250K blackbody curve.

IIRC the spectrum follows a 270K blackbody curve where the atmosphere is IR transparent i.e. it «sees» the temperature of the ocean surface but in the 15um region it drops down to follow a 250K blackbody curve.

At equilibrium with cell contents and source at the same temperature, the spectrophotometer will see the same blackbody curve and total energy flux for T whether the cell is evacuated or filled with any gas or mixture of gases.

Not exact matches

The smooth dotted lines in the diagram labeled with temperatures are the curves for a simple blackbody radiating at that temperature.

Over this is superimposed a set of smooth curves of ideal blackbody radiation, labeled with temperatures.

For comparison, the red curve shows the flux from a classic «blackbody» at 294 ° K (≈ 21 °C ≈ 69.5 °F).

So they put more emphasis on the «Planck curve blackbody spectrum showing peak energy output in the visible», but both use this.

Blackbody just means something radiates in a standard curve across the frequency spectrum according to its temperature.

Low cloud cover provides a perfect blackbody emission curve when looking up, no CO2 emission lines, no methane line no H20 lines, a perfect blackbody.

6) Thus, if we assume, as a first approximation, that the Surface approximates a blackbody at 288 K, with a spectrum something like the smooth blue curve in my illustration above, we see that the Atmosphere passes the ~ 10μm region (except for part of the ~ 9.5 μm oxygen / ozone «bite») and, from the Perry plot of Surface looking UP, re-emits much of the ~ 7μm and ~ 15μm region back down to the Surface.