by Johannes Urpelainen, Ph,D.
A recent study in the Proceedings of the National
Academy of Sciences, entitled “Expertise and Credibility in Climate Change,”
reports the results of an analysis of the expertise of climate scientists. The
results are not particularly surprising:
1) Among scholars who publish regularly on climate, an
overwhelming majority accept anthropogenic global warming.
2) Most of the scholars who contest anthropogenic global
warming have a less credible scientific record than those who accept.
While this should not come as a surprise to anyone who has
followed the debate on climate science, I doubt it will convince the skeptical
public.
The reason is that in addition to the most obvious interpretation of
these facts — scientific expertise leads individual scholars to accept the strong
evidence for climate change — alternative "theories" may resonate with skeptics:
1) Perhaps skeptics are systematically not allowed to
publish in journals, so that they seem less experienced than other scholars?
2) Perhaps the public pressure to accept anthropogenic
global warming is particularly heavy among top scientists?
3) Perhaps the authors of the study are themselves
supporters of anthropogenic global warming, and thus use data selectively to
make their case?
This brings us to the deeper problem with climate science
and the media: it does not matter much how credible the evidence for climate
change is, as long as influential special interests continue to benefit
from contesting it. Almost any fact regarding the credibility of climate
science can be explained away using a conspiracy theory, and individuals who
are already inclined towards rejecting science are probably also inclined
towards accepting such conspiracy theories. Thus, deeper institutional changes
may be necessary to improve the public understanding of climate science.
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