The survey relies on self-reported data, which can be subject to biases. For example, respondents may overestimate their own expertise or publications.
The response rate of 29% is relatively low, raising concerns about the representativeness of the sample.
Ambiguous question phrasing
The phrasing of certain survey questions, particularly about quantifying the contribution of greenhouse gases, may have led to some confusion and underestimation.
Limited scope of sampled experts
While the survey includes a large number of scientists, it focuses on those who have published on climate change, potentially excluding other relevant experts.