…doesn’t exist to any measurable extent in the real world. The computer models have been tuned by about 100 parameters to track a multi-decadal warming from about 1979 to 1997 and faithfully continue that trend; but even Global Warming luminaries like Dr. Michael Mann are now conceding that there hasn’t been any GW from 1997 to 2014 – in spite of rising CO2 concentrations.
This shouldn’t have happened. So the theory is wrong. Go to woodfortrees and play with the data yourself.