It was well-known to the Time/Newsweek-reading crowd, but not to serious climate scientists. As the author pointed out in his description of writing the Newsweek version, it was at best a fringe position without much backup data or analysis.
Despite active efforts to answer these questions, a pervasive myth has taken hold in the public consciousness: That there was a consensus among climate scientists of the 1970s that global cooling or a full-fledged ice age was imminent (e.g., Balling 1992, Giddens 1999, Schlesinger 2003, Inhofe 2003, Will 2004, Michaels 2004, Crichton 2004, Singer and Avery 2007, Horner 2007). A review of the climate science literature from 1965 to 1979 shows the myth to be false. The myth’s basis lies in a selective misreading of the texts both by some members of the media at the time and by some observers today. In fact, emphasis on greenhouse warming dominated the scientific literature even then. The research enterprise that grew in response to the questions articulated by Bryson and others, while considering the forces responsible for cooling, quickly converged on the view that greenhouse warming was likely to dominate on time scales significant to human societies (Charney et al. 1979).
THE MYTH OF THE 1970S GLOBAL COOLING SCIENTIFIC CONSENSUS Thomas C. Peterson* NOAA National Climatic Data Center, Asheville, North Carolina William M. Connolley British Antarctic Survey Natural Environment Research Council, Cambridge, United Kingdom and John Fleck Albuquerque Journal, Albuquerque, New Mexico