Then plug it into a 15 variable equation simulate 100 years and viola accurate down to 0.01C
Except its garbage.
Those models sure are shit!
Except for the ones that aren't.
Study: (In a real peer reviewed journal no less!)
http://www.nature.com/nclimate/journal/v4/n9/full/nclimate2310.html
Abstract
The question of how climate model projections have tracked the actual evolution of global mean surface air temperature is important in establishing the credibility of their projections. Some studies and the IPCC Fifth Assessment Report suggest that the recent 15-year period (1998–2012) provides evidence that models are overestimating current temperature evolution. Such comparisons are not evidence against model trends because they represent only one realization where the decadal natural variability component of the model climate is generally not in phase with observations. We present a more appropriate test of models where only those models with natural variability (represented by El Niño/Southern Oscillation) largely in phase with observations are selected from multi-model ensembles for comparison with observations. These tests show that climate models have provided good estimates of 15-year trends, including for recent periods and for Pacific spatial trend patterns.
Article on the study:
http://m.phys.org/news/2014-07-vindicates-climate-accused.html
Choosing only those ones with accurate settings for Pacific Ocean temperatures for each 15-year period meant they did a better job of recreating temperature trends during those periods, Risbey explained.
Unfortunately these accurate short term climate models that include ocean effects aren't good for 100 years.
But that's ok because the existing models are accurate for the long term:
But for longer-term projections, such as the expected warming by the end of the century, this approach will not work because the dominant influence on temperature will be greenhouse gases, rather than natural cycles such as El Niño.
"If you want to do a forecast for next year then you can neglect the forcing, meaning the change in greenhouse gases, because greenhouse gases hardly change the climate from this year to next year relative to natural variations," he said.
"But over 100 years, it doesn't really matter what phase of PDO we're in – whether it's El Niño-dominated or La Niña-dominated. The main thing that's going to determine where our temperatures are in 100 years time is going to be the response to the forcing: the greenhouse bit."
So if I was climate change denying scientist I'd be like
Climate Pause. - Reality: Ocean thermal energy is increasing and larger than originally reported, hottest six months on record - Shit!
Climate change is just cause by ENSO/ANSO and the models are crap. - Reality: the models that predict ANSO/ENSO are accurate. - SHIT!
I know climate sensitivty!
So now we know why we have sloppy climate sensitivity analyses done by climate skeptics like this guy and Judith Curry coming out of the woodwork. It's the only FUD they have left.
(Of course Judith came up with a sensitivity 3 times higher so I guess you can throw hers out too)