"This research undercuts claims by greenhouse skeptics that no warming has occurred during the last two decades. Such claims are based on satellite measurements of temperatures in the troposphere, which show little or no warming since the beginning of the satellite record in 1979.
"Weather balloons and weather forecast models show that there's been a pronounced increase in the height of the global tropopause over the last two decades," Santer said. "Our best understanding is that this increase is due to two factors: warming of troposphere, which is caused by increasing greenhouse gases, and cooling of the stratosphere, which is mainly caused by depletion of stratospheric ozone. Tropopause height changes give us independent evidence of the reality of recent warming of the troposphere."
The first paragraph says "there is no evidence of warming in the troposphere". The second says that the increased size in the tropopause is due to two factors, one of which is "warming of troposphere".
Do you see what kind of crap this article is? If there is no evidence that there is warming of the troposphere then how can you say that the warming of the troposphere causes the increase in size of the tropopause?
If anything, this same evidence - no warming of the troposphere - disproves the hypothesis.
As near as I can tell from this almost unintelligible summary, this is just another computer-model masturbation by some guys with too much beer and not enough grant money.