Sentences with phrase «water vapor feedback roughly»

Studies show that water vapor feedback roughly doubles the amount of warming caused by CO2.

Not exact matches

The water vapor feedback (a generally positive feedback)-- there is an roughly exponential increase in saturation water vapor pressure with increasing temperature, and the relative humidity (at a given vertical level) overall tends not to change a lot globally, though there will be different regional trends associated with shifting precipitation patterns.

And, since IPCC assumed essentially constant relative humidity with warming to arrive at the water vapor feedback and it appears that RH decreases with warming (Minschwaner + Dessler 2005, NOAA radiosonde and satellite humidity records), the water vapor feedback is very likely too high by around 0.3 C to 0.6 C, bringing the overall adjusted ECS to roughly 0.9 C to 1.2 C.

Studies show that the water vapor «feedback loop» roughly doubles the warming caused by carbon dioxide.

Using feedback parameters from Fig. 8.14, it can be estimated that in the presence of water vapor, lapse rate and surface albedo feedbacks, but in the absence of cloud feedbacks, current GCMs would predict a climate sensitivity (± 1 standard deviation) of roughly 1.9 °C ± 0.15 °C (ignoring spread from radiative forcing differences).

Water vapor feedback in climate models is positive mainly because of their roughly constant relative humidity (i.e., increasing q) in the mid-to-upper troposphere as the planet warms.

When the authors of the paper looked at their general climate models, they discovered that, once they corrected for an El Nino that occurred right after Pinatubo erupted, the model only produced roughly equivalent cooling if water vapor feedback was included in the model (Figure 4, to the right).