Some of the readers of this blog might wonder if it is necessary to provide any more disproof of the GE. In any case, by now there are at least 367 proofs of Pythagora's theorem, so I thought I could contribute with disproof nr 368 of the Greenhouse Effect. It is not entirely my own, I think it has been suggested before. For this purpose we will take a closer look at Jupiter.
In the article "Rethinking the Greenhouse Effect" by Alan Siddons, it is shown among other things that at 1 bar of pressure, all planets have temperatures much larger than a blackbody temperature estimate would yield. Facts of this kind are important in the search for the correct explanation for the heating impact of the atmosphere. The question I now ask is whether there is information contained in this data with which we can immediately rule out the old theory, that is the existence of any radiative greenhouse effect at all.
The gas giant Jupiter has a multifaceted "atmosphere", but below 1 bar of pressure it is almost entirely composed of hydrogen and helium (Alan may correct me if I'm wrong). And the amazing thing is that below this pressure the temperature decreases. Ok, so what? In previous posts I have argued and demonstrated that
1. The canonical greenhouse hypothesis says that in the absence of radiative forcing from greenhouse gases the temperature of the atmosphere will (on average) be the same at all altitudes (pressures).
2. Any attempt to mathematically reformulate the greenhouse hypothesis such that it implies a heating of the entire atmosphere is bound to lead to a runaway effect (unless there are other factors incorporated that can not be expressed in mathematical terms, such as divine intervention).
If we now add the observation
3. Jupiter has a temperature gradient below 1 bar of pressure, which is not maintained by greenhouse gases.
Thus, the greenhouse hypothesis is falsified. This disproof has the character of a mathematical proof in the sense that each step is simple, but in the end you reach a conclusion that was maybe not obvious from the beginning. But it is not lengthy nor complicated, it could be understood by any scientist who is willing to listen.