[aerohead]

It was Ph.D.( physics),MIT, Mark Bowen, who remarked that, the climate model predictions have been accurate since 1980, and over the next 25-years, James Hansen's predictions represented a significant fraction of them.
From his book entitled, 'THIN ICE,' 2005.
Data is from the Geophysical Year, November-to- November, each year.
Global warming is punctuated by episodes of Benjamin Franklin's global cooling 'parasol effect', postulated in 1784, as a consequence of massive volcanic eruptions which can cool the entire planet for up to half a decade.
Also, sulfur-dioxide atmospheric aerosols from coal-fired power plants maintain a constant global cooling component, and at such time as coal-fired facilities are taken off-line, Earth will warm an additional half-degree within a couple months, after the aerosols precipitate out of the atmosphere.
Consequently, things are worse than they seem as we reap the Faustian bargain:
* we get a relatively 'cooler' planet while the coal burns
* at the expense of a nearly-immediate global temperature rise when we do shut them down