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Well, sometimes it does! Otherwise possible effect of methane drowned out by that of water vapor. Effect of 4.3um CO2 band inherently negligible due to small amount of upgoing thermal radiation at that wavelength. Effect of 14.9um CO2 band mainly drowned out by that of water vapor. Therefore, small increases of CO2 will consequently have only a very, very small effect.

Thanks for posting the graph. I’ve been looking for something like this for years.

I’d heard the upgoing thermal radiation atmospheric window was relatively small. The assumption was that the impact of small increases in CO2 are magnified because it blocked that window.

The chart you posted shows the impact of CO2 is outside the window. Global warming attributed to a direct increase in CO2 is a scam.

Nice chart. Right about methane. It only contributes to greenhouse effect in a totally dry atmosphere, like created in a laboratory bell jar. When idiots on the media say it is “60 times as powerful as CO2” or some such phoney number, Then “real science says” they’re full of it.

Excellent plot of the energy budget for Earth. Had to check the units for the black body curve, Watts per Meter² per Steradian per Micrometer. Units for irradiance is just W/m^2 but radiance includes an angular component (Steradian), like looking at the sky through a metal pipe.

It’s interesting to note the almost complete absorption of incoming solar radiation in the UV region under the black body curve (red line). The intensity of the solar radiation peaks in the middle of the visible region (~500 nanometers, green light), exactly where water is most transparent to light (an inherent property of water). Scientists should note these properties (dwarf yellow star, ~5500 degrees K surface temperature, terrestrial planet at a distance from the host star of one AU) in the search for habitable planets.

Water vapor absorption is significant for wavelengths greater than one micron, CO2, not so much. Climate sensitivity to a doubling of CO2 is most likely no more than one degree C but with clouds providing a net negative feedback, catastrophic warming is highly unlikely.

If climate was that sensitive to CO2 we would have suffered a runaway greenhouse effect (similar to Venus) a long time ago. The fact that we are here bears witness to the long-term stability of our climate. The key to our survival is the oceans, the raining-out of water from the atmosphere provided a natural thermostat.