Why can’t the “science” guys provide a non-imaginary number in response to: how much does temperature increase when we control all variables and vary CO2 from 280 to 420PPM?
This and #310 of yours prior offer a segue into a couple of basic points to visit on this issue.
First let's look at the math, which BTW is basic K-12 arithmetic, no calculus needed.
To make that even more simple math, I'll use 400 ppm.
"ppm" means "parts per million" so another way to express that would be:
400 / 1,000,000
that can reduce to:
4/10,000
which can further reduce to:
1/2,500
So what the science deniers who are proponents of ACC/AGW are claiming is that the small amount of heat retained by one part of CO2 will transfer to and equally heat up the other 2,499 parts of the dry atmosphere, the Nitrogen, Oxygen, Argon, etc.
Sounds a bit impossible to most intelligent and sane people when presented that way, doesn't it ?
After all, we aren't talking about radioactive substances and fission or fusion which is what would usually be needed to produce such levels energy transference. We are talking basic physics, thermodynamics.
Another way to think about 400ppm of CO2 compared to the rest of the DRY* atmosphere, would be reduce it to percentage.
In that case the CO2 amounts to 0.0004% of the dry atmosphere total content.
Barely measurable it could seem.
Yet, that is barely enough to sustain 99% of life on this planet, the flora/plants and they in turn help to make that oxygen, 21%, that we 1% animals, humans included, need to live.
Considering that 400ppm is barely above the 300ppm minimum most plants need to not starve, sane and rational persons might think we could use a little more CO2, not less!
* Note also that there is water vapor, H2O in the atmosphere (thank Creator), clouds and the rain they produce, and this usually averages to an additional 10% around the planet with the dry parts. H2O ~ water vapor is also a greenhouse gas (GHG) but with it at 10.00%+ versus the CO2 of 0.0004% it should be clear which is the greater source of atmosphere and planet warming when it comes to the air around us as a factor.