What You Won’t Find in the New National Climate Assessment

Watts Up With That?

Guest essay by Dr. Pat Michaels

Under the U.S. Global Change Research Act of 1990, the federal government has been charged with producing large National Climate Assessments (NCA), and today the most recent iteration has arrived. It is typical of these sorts of documents–much about how the future of mankind is doomed to suffer through increasingly erratic weather and other tribulations. It’s also missing a few tidbits of information that convincingly argue that everything in it with regard to upcoming 21st century climate needs to be taken with a mountain of salt.

The projections in the NCA are all based upon climate models. If there is something big that is systematically wrong with them, then the projections aren’t worth making or believing.

Here’s the first bit of missing information:

The chart shows predicted and observed tropical (20⁰N-20⁰S) temperatures in the middle of the earth’s active weather zone—technically the mid-troposphere, roughly from…

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