Citation:
Observation: 0.2 Watts per square meter per decade
Hansen: 0.58 Watts per square meter from 2005-2010
IPCC AR5: Equilibrium climate sensitivity is likely in the range 1.5°C to 4.5°C
Points:
Direct measurement of warming is roughly 1/5th of expected.
IPCC expects 3C per doubling of CO2.
1/5th of that is 0.6C.
A change from 300ppm to 400ppm is 1/3rd of a doubling, or 0.2C.
Conclusion:
Therefore, since 1950, human CO2 emissions have increased global temperature by roughly 0.2C. To approach 2C of warming, CO2 would need to double three times. To 600, 1,200, and finally reach over 2,400ppm. With sensible policy there should be no expectation of surpassing 2,000ppm.
I stand in opposition by claiming much of what advocates profess has been exaggerated. I believe Climate Sensitivity is roughly 0.6C and therefore we can take our time in addressing it with sensible policy.
LOL those links you provided don't say what you think they say. You just seem to assume that because they are both in square meter that they are directly comparable and attempting to measure the same thing.