This is a guest post by ClimateDenierRoundup crossposted from DailyKos
One of the first peer-reviewed surveys of scientists used to determine the level of consensus on human-made climate change was undertaken by Dennis Bran and Hans von Storch in 1996. They used a standard survey response format known as the “Likert Scale,” where respondents answer questions based on a scale of 1 to 7 to determine, for example, how confident they are that warming is happening or that it’s human-caused.
They’ve repeated the survey a few times since 1996, and have recently released the 5th International Survey of Climate Scientists, for 2015/2016. Bart Verheggen helpfully goes over the key consensus findings as well as a couple of issues with the survey.