- #1
WeatherRusty
- 38
- 0
One of the key factors in determining the climate sensitivity to the increasing atmospheric concentration of CO2 and other long lived greenhouse gases is the response of water vapor to the relatively small warming induced by these gases. Climate models produce a strong signal of positive water vapor feedback, while actual measurements taken over the past few decades seem to indicate otherwise if some of the popular skeptical blogosphere presentations are to be believed (specific humidity is purportedly shown to be decreasing). Water vapor feedback is indeed positive near the surface in the planetary boundary layer, but what about higher up in the mid and upper troposphere where the critical impact on enhancement to the greenhouse effect would take place? Can anyone here come up with peer-reviewed studies of this issue?