Boris
2008-05-31 12:53:27
“There is no evidence that the climate is subject to positive feedback and in fact a lot of evidence that it isn’t.”
This is quite untrue. Basic theory says that a warmer planet will have more water vapor in the air, and this has already been detected
In addition, ice albedo feedback is uncontroversial and adds to the warming.
I’m not sure what you mean by “tipping point”, but AGW does not contend that there will be any kind of runaway greenhouse effect (although there are so=-called tipping points, e.g. the point at which the permafrost melts substantially and gives off methane or the point at which the oceans begin to absorb less CO2.)
