“Quantifying the consensus on anthropogenic global warming in the scientific literature” by John Cook et al: 97% of climate scientists agree that humans are causing global warming.
POSTED FOR COMMENTARY BY SCIENTISTS
In the video abstract of his published survey, John Cook states that “among climate scientists actively publishing [peer-reviewed] climate research, 97% agree that humans humans are causing global warming. ” He states that the 97% finding was based on over 12,000 papers from 1991-2011 mentioning “global climate change’ or ‘global warming.’ Here’s an excerpt:
Out of the 12,000 papers, we identified just over 4,000 stating a position on human-caused global warming. Among these 4,000 papers, 97.1% endorsed the consensus position that humans are causing global warming. In the second phase of our study, we asked the scientists who authored the studies to rate their own papers. 1,200 scientists responded to our invitation, so that just over 2,000 papers in total received a self-rating. Among the papers that were self-rated as stating a position on human caused warming, 97.2% endorsed the consensus. These results were strikingly consistent with previous surveys.
(1.45-2:24 in video).
Source: “Quantifying the consensus on anthropogenic global warming in the scientific literature,” John Cook et al 2013 Environ. Res. Lett. 8 024024 (published May 15, 2013). http://iopscience.iop.org/1748-9326/8/2/024024/article.