Study Finds 97% Consensus on Human-Caused Global Warming in the Peer-Reviewed Literature

http://thinkprogress.org/climate/2013/05/15/2014211/study-finds-97-consensus-on-human-caused-global-warming-in-the-peer-reviewed-literature/

By Climate Guest Blogger on May 15, 2013
By Dana Nuccitelli and John Cook via Skeptical Science.

A new survey of over 12,000 peer-reviewed climate science papers by our citizen science team at Skeptical Science has found a 97 percent consensus in the peer-reviewed literature that humans are causing global warming.

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Our results are also consistent with previous research finding a 97 percent consensus amongst climate experts on the human cause of global warming. Doran and Zimmerman (2009) surveyed Earth scientists, and found that of the 77 scientists responding to their survey who are actively publishing climate science research, 75 (97.4%) agreed that “human activity is a significant contributing factor in changing mean global temperatures.” Anderegg et al. (2010) compiled a list of 908 researchers with at least 20 peer-reviewed climate publications. They found that:

“≈97% of self-identified actively publishing climate scientists agree with the tenets of ACC [anthropogenic climate change]“

In our survey, among scientists who expressed a position on AGW in their abstract, 98.4% endorsed the consensus. This is greater than 97% consensus of peer-reviewed papers because endorsement papers had more authors than rejection papers, on average.

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However, research has also shown that the public is misinformed on the climate consensus. For example, a 2012 poll from US Pew Research Center found less than half of Americans thought that scientists agreed that humans were causing global warming. One contributor to this misperception is false balance in the media, particularly in the US, where most climate stories are “balanced” with a “skeptic” perspective. However, this results in making the 3 percent seem much larger, like 50 percent. In trying to achieve “balance”, the media has actually created a very unbalanced perception of reality. As a result, people believe scientists are still split about what’s causing global warming, and therefore there is not nearly enough public support or motivation to solve the problem.

Such false balance has long been the goal of a dedicated misinformation campaign waged by the fossil fuel industry. Just as one example, in 1991 Western Fuels Association conducted a $510,000 campaign whose primary goal was to “reposition global warming as theory (not fact).” These vested interests have exploited the media desire to appear “balanced.”

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Another important point is that once you accept that humans are causing global warming, you must also accept that global warming is still happening; humans cause global warming by increasing the greenhouse effect, and our greenhouse gas emissions just keep accelerating. This ties in to our previous posts noting that global warming is accelerating; but that over the past decade, most of that warming has gone into the oceans (including the oft-neglected deep oceans). If you accept that humans are causing global warming, as over 97% of peer-reviewed scientific papers do, then this conclusion should not be at all controversial. With all this evidence for human-caused global warming, it couldn’t simply have just stopped, so the heat must be going somewhere. Scientists have found it in the oceans.

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