Ah, Wikipedia! Chicken Little's main source of scientific research!  Wave the magic Wikipedia wand and POOF!, ALL alternate studies can't stand up to scrutiny and are hereby debunked!

One cannot help but notice your dependence, throughout these comments, on Wikipedia.

Another interesting note is the discrepancy between IPCC's projected warming, assumed to occur by 2100, from a doubling of atmospheric CO2 derived from the IPCC climate models versus from actual observation based estimates is in stark contrast.  "If the sensitivity of the climate system is as low as some of these observational results suggest, then the IPCC models are grossly in error, and we have little to fear from manmade global warming."