Of course warming will come "roaring back". Then, it will diminish again. Then, it will increase again. Then... The half cycle period is roughly 30-35 years.
It is a <a href="http://digitaldiatribes.files.wordpress.com/2009/02/hcsinglesinext.jpg" rel="nofollow">repeating natural cycle</a>, due most likely to a randomly excited, lightly damped resonant mode in the Earth's land/water/atmospheric system.
Temperatures will go below the long term trend until sometime in the 2030's, then rise above it again, then decline, then rise, and on and on and on. At some point, the long term trend likely will taper off, and an abrupt transition to a new ice age may ensue. These cycles have been going on for eons.
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