Just more ignorance is all you have, it is actually about 80 times by chemical analysis but since nearly nothing X nearly nothing is still nearly nothing.
1.9 ppm (parts per million)
Or, in percentage of the atmosphere:
0.000 19 Percent [%]
View attachment 613120
CO2 is 430 ppm
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From
HERE is a comment worth reading:
Into ModTran, put US standard atmosphere, fixed relative humidity, and a type of cloud cover that results in about 240 watts…. Save the result as the “background case”.
Double methane in Modtran to 3.8 ppm from 1.9 ppm, which means twice as many rice paddies, termites, cow pastures, leaky pipelines…etc..and
you only get 0.17 C increase as the new surface temperature…so no biggie…
Also, regarding the 84 times GWP for CH4….99.9+% of IR photons that hit either a CH4 or CO2 molecule will rattle the molecule a bit harder and warm up the thousands of other air molecules around them. Emitting an IR photon of the same energy is a relatively rare occurence compared to kinetics.
So an IR photon will be absorbed by a CH4, or a CO2, or a H2O, mostly warming a wee bit the surrounding air molecules, or possibly zip through the atmospheric window….but implying CH4 is going to cause 84 times the warming as CO2 has lost sight of how many IR photons are available from the surface to start with.
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CH4 is also mainly overlapped by Water Vapor in the IR spectrum thus the effect tiny as it already is gets smaller.