Moving through water vapor, LW potons take approximately 0.024 seconds to reach the outer limits of the tropopause. LW photons passing through CO2 alone take approximately 0.0042 seconds to reach the outer limits of the tropopause. Want to see the math?
That fact alone tells a resonable person that CO2 is irrelavent with regard to temperatures as it is completely overwhelmed by the effect of water vapor in the atmosphere. The fact that it takes LW longer to travel through water vapor isn't the primary issue with water vapor, however, it is the fact that water vapor can actually trap, and retain heat. It has to do with the fact that water vapor can change phases in the open atmosphere. You can do a quick experiment yourself to see this phenomenon. Water vapor, by the way, is the only substance known to man that can change to all 3 phases in the open atmosphere.
Freez a bowl full of ice with a thermometer sticking in it. Then take the block of ice and put it in a large pot of water and put it on the stove at high heat. The block of ice will remain at 32 degrees till it is gone even though it is clearly absorbing energy from the surrounding water. By the time the ice is gone, the water should be boiling. The temperature will jump to 212 F where it will remain even though it is constantly absorbing more energy from the surface of the stove. I won't go into the process of superheating steam because you couldn't do it in your home and it is irrelavent to the atmosphere anyway. The point is that water vapor is the only gas in the atmosphere that can actually trap heat.
The climate is always changing. The question isn't whether or not the climate is changing, that is a given. The question is over your assertion that man is causing it. Ticking off changes that are within the realm of natural variability however, does nothing to establish any sort of responsibility for the changing climate on man.
Don't kid yourself. I am, unlike you, straight forward because I actually understand the topic. I don't have to talk around science that I don't understand trying to look like I do.
So about that hard evidence that has apparently convinced the scientific bodies around the globe. Any luck with it? I can't help but notice that you keep posting but don't seem to be able to produce even the smallest shred of hard, observable, repeatable evidence that establishes a hard link between the activities of man and the changing climate.
Rather than continue looking like a rube, why not simply admit that you can't produce any because none exists. At least you will give the appearance of being honest even though we both know the real score on that issue.
I guess maybe we're getting closer. Now, your current position is that the climate really is changing.
Like the climate, your opinion of that one keeps changing, too, but nevertheless, let's continue.
Yes, water vapor is a powerful greenhouse gas, and is in fact, part of a feedback loop, but you already know that.
And yes, water, unlike matter that stays in the same state at normal temperatures, does absorb and release heat as it changes from solid to liquid to gas.
So, you do have most of it right now.
However, there are other greenhouse gasses besides water vapor.
CO2 for example. Gasses that make up most of the atmosphere are not greenhouse gasses, as they are either monatomic, such as argon as an example (Ar), or are made up of two molecules of the same element (O2, N2) and so have no net change in dipole moment when they vibrate and hence are almost totally unaffected by infrared light.
H2O, CH4, and CO2, on the other hand, are neither monatomic nor made up of two atoms of the same element.