However, I hope it doesn't surprise you to know that the major change in radiative forcing, which may affect the concentration of water vapor in the atmosphere, is due to increasing greenhouse gas concentrations. If the feedback effect on atmospheric water vapor is positive and not negative -- and that's still VERY uncertain -- then the radiative forcing effects of increasing greenhouse gas concentrations will be augmented.
If the feedback effect on atmospheric water vapor is positive and not negative -- and that's still VERY uncertain -- then the radiative forcing effects of increasing greenhouse gas concentrations will be augmented.
The direction of feedback effect of water vapor upon the global warming equation is unknown.
Lets See, mankind contributes 0.26% of all greenhouse gases (including water vapor)
Water vapor comprises 95% of greenhouse forcing.
If the feedback effect of water vapor is unknown, then any radiative forcing effects of man's contributions of greenhouse gases (0.26% of total GHGs) is also totally unknown.
There is no basis on which to change fuel use policies to effect changes as regards IPCC Global Warming storyline modeling.