In 1979, the National Academy of Sciences was asked by the Director of the Office of Science and Technology Policy to prepare a report to assess the scientific basis for projection of possible future climate changes resulting from anthropogenic carbon dioxide emissions. The Academy convened an ad hoc study group, headed by Jule Charney, to write the report. This report became influential for both policy makers and scientists, and is frequently cited as "the Charney report." It is especially useful as an outline of the state of climate models in the late 1970s, including some discussion of the largest unknowns in climate modeling.
DOWNLOAD THE REPORT [pdf]
Also see Numerical Methods Used in Atmospheric Models