All interesting replies. Can't say I understood it all :mrgreen: but I have an idea (small as it may be) what you were getting at.
I'm not sure to what degree your comments pertain specifically to the laws of physics but I do know the laws of physics and chemistry apply to what drives the biological processes of plants and humans, heat from stars, waves of the ocean, and really anything to do with climate and greenhouse gases. Basically, physics and chemistry explain every operation in the universe, big or small.
Climate science draws on multiple physical sciences. But the laws of physics and chemistry govern all of them. It's these laws which make things predictable. Well, as predictable as can be given the body of our knowledge for the day and the tools of the day we have to investigate. I suppose a lot of things we still don't grasp and can't quite predict at the quantum level. You can correct me if I'm wrong?
I think one error we lay people of science often make is we think laws of physics and chemistry do not apply to physical things in this or that scenario. Be it climate change or aliens traveling to earth.
My point was that a person with a PhD in Physics and a Nobel Prize in Physics, is like capable of
seeing that the concept of AGW lacks much of the evidence we expect from a Science that claims it is settled.
The portion of AGW that is based on actual physics is that CO2 is a greenhouse gas, and doubling it's concentration
in the atmosphere will cause some warming. Almost all scientist agree with this!
The amount of warming from the CO2 forcing is also in relative high agreement, but there are aspects,
of the forcing that are poorly understood.
(like the majority of the observed warming has been with nighttime lows not getting as cold.)
Where the scientific disagreement is with the second part of the AGW prediction, the amplified feedback.
The basic concept looks like this, double CO2 causes 1.2 C of forcing warming,
The 1.2 C of warming is then amplified by a collection of open loop feedbacks, to cause total warming between 1.5 and 4.5C.
So with 1.2 C as the input, the output will increase between .3 and 3.3 C.
The problem with this is that the results of the predicted amplified feedbacks, have not been observed in a
way that can be measured!