Previous Studies of the Consensus on Anthropogenic Global Warming
As shown in the chart, studies of the consensus among scientists on anthropogenic global warming that are based on literature surveys give higher and more consistent results than opinion polls. Using rejection as the criterion of consensus, five literature surveys (11-15 in the chart above) agree closely (literature survey 10 did not use rejection alone). The five comprise 54,195 articles from 1991-2015 and reveal an average consensus of 99.94%. I estimate that at least 150,000 individual authors wrote those articles and that number does not include all those who wrote about AGW during the period, only those found using specific search terms. (See Powell 2016, Bulletin of Science, Technology & Society, 36(3), 157-163. doi:10.1177/0270467617707079.