Well Established Science (Score 5, Informative)

There seem to be a few things missing in this discussion:

1. The fact that most of the warming associated
      with global warming is directly forced by water
      vapor is well established, going back at least
      as far as Arrhenius's 1895 paper often credited
      with "discovering" global warming.
      (original paper at:
            http://geosci.uchicago.edu/~archer/PS134/arrhenius .1896.climate.pdf
        )
        i.e. this result is CONSISTENT with our understanding
        of global warming.

2. Increases in atmospheric water vapor are tightly tied
      to temperature. The saturation specific humidity
      (the amount of water air will hold) increases
      exponentially with temperature (an implication of the
      Clasius-Claperyon relationship). Thus when you increase the
      temperature of the atmosphere by dT (by, for example, adding
      some CO2), more water vapor evaporates into the atmosphere,
      amplifying the warming.

3. This effect, known as the water vapor feedback, has been in
      our climate models from the beginning (at least as far back
      as 1895), and produces results consitent with observations.

4. The cited Geophysical Research Letters paper uses observations
      to estimate the strength of the water vapor feedback and
      finds that it is strong (even stronger than most models
      predict). It is also a step in the process
      of understanding climate change on a regional level.

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