Global Warming : No Global Warming due to CO2 (2021.12)
☆ Radiative Cooling :
The global warming in terms of CO2 has been discussed quite extensively for the last four decades. However, it is impossible to find any physical mechanism in which CO2 may play any important role for the global warming.
The cooling of the earth can only be made possible due to the radiation, and this is clear since the outer space of the earth is vacuum, and thus there is no way to lose the heat of the earth in terms of heat conduction. This means that the earth is only cooled down by the black body radiation on the earth surface. Therefore, the problem of the global warming is related to the physical processes as to how the radiation from the earth surface can be blocked by the atmospheric molecules. We know that the main part of the radiation block should be due to the absorption of the radiation by cloud or water vapors. But this has nothing to do with the global warming we are now discussing.
☆ Absorption of Infra-red Rays by CO2 :
The resonance absorption of electromagnetic waves by CO2 must be the main mechanism to suppress the radiative cooling of the earth. In case CO2 may absorb a photon (here it should be infra-red rays since the temperature on the earth surface must be around 300 K) in terms of the resonance scattering, then the resonance state of CO2 may emit this photon back to the earth roughly with 50 % probability. Therefore, it should be important to estimate the absorption rate of infra-red rays by CO2 in the air. This can be done by making use of the observed resonance values of the infra-red rays by CO2, and it turns out that the sum of the absorption rate should be much too small (less than 1 %) compared to the observed global warming rate.
☆ Green House Effects :
In this case, a question may arise as to why people believe the global warming due to CO2. This belief should have started from the claim of some people in the US in terms of Green House Effects. Why did they claim this green house effects ? This claim is known to be based on the book written by Arrhenius in 1890's. Indeed, at that time, some physicists discussed the green house effects on the earth. However, at that time, quantum mechanics was not discovered yet. In addition, people believed that light should be a wave. Therefore, there was no chance that the absorption of light can be treated in terms of the resonance scattering. But nevertheless, some people in the US accepted this theory of green house effects, and they claimed that the global warming should be due to the absorption of light by CO2. It is quite unfortunate that this wrong theory of global warming became eventually an accepted theory in this field.
☆ Absorption of Electromagnetic Wave :
It is well-known that the most important objects that absorb the electromagnetic waves should be cloud or water vapors. But this has nothing to do with the global warming. In this case, it should be important to note that water vapors should not be a simple H2O (water) molecule, but it is liquid which can absorb infra-red rays.
☆ Scattering Probability between Infra-red Rays and CO2 :
Here, we should make a comment on the scattering probability of infra-red photon with CO2 in the atmosphere. In the above estimation of the infra-red rays absorption by CO2, we made an approximation that this scattering probability is taken to be unity, which is, for sure, an overestimation of the cooling effects. In reality, we should multiply the scattering probability to the absorption rate. This calculation can be easily done, and it turns out that the scattering probability is less than one millionth. This means that infra-red rays should rarely scatter with CO2 in the air. ( Infra-red Rays Scattering with CO2 )
☆ Fossil Fuel :
However, if we use the energy of fossil fuel, then this should indeed correspond to the global warming in some way or other. But at the same time, nuclear energy should also contribute to the global warming. A question must be the total amount of the energy which should be daily used on the earth. But at the present day, the total energy we are using on the earth in terms of fossil fuel and nuclear power must be much smaller than the total amount of U-238 decay energy inside the earth.
☆ Submarine Volcanic Explosion and Solar Pulsation :
The most serious question must be what should be the main mechanism of the global warming.
This is, by far, too difficult to find any reasonable answers. In what follows, I should discuss two possibilities of the global warming. The first candidate must be the undersea volcanic eruption, and this may induce a possible warming of sea water. In this case, there should be some increase of water vapors in the air. This, in turn, should block off the infra-red rays, and thus should contribute to the global warming. But we do not know how we can estimate the amount of energy of the infra-red rays blocked by the additionally created vapors from the volcanic explosions.
The second possibility must be the solar pulsation which may induce the change of the solar energy. However, there is no way to estimate the solar pulsation at present, even though glacial ages must have repeatedly occurred on the earth.
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