Earlier this month, we reported on a new study by Marcott et al. in Science: Recent Warming Is ‘Amazing And Atypical’ And Poised To Destroy Stable Climate That Enabled Civilization. It was the source of most of the data in this popular, jaw-dropping graph:
Our view is that the results of the paper will stand the test of time, particularly regarding the small global temperature variations in the Holocene. If anything, early Holocene warmth might be overestimated in this study.
The main, stunning conclusion we can draw from the paper is that the rate of warming since 1900 is 50 times greater than the rate of cooling in the previous 5000 years, which undermines the whole notion of adaptation.
But the study also means the famous “Hockey Stick” graph is correct (and indeed too optimistic — even by mid-century, the hockey stick actually looks more like a brick wall for humanity, as the figure shows).
Of course, the deniers can’t stomach any independent support for the hockey stick, even though countless studies have now backed it up. So the lemming-like disinformer blogs continue to press the most inane attack on Marcott et al., arguing that the warming of the past century the authors found in their proxy records is in error.
What makes this so anti-scientific is that the uptick just happens to match the uptick in the heavily documented and independently verified instrumental record. So the disinformers are spending most of their time attacking the one part of the paper that we know unequivocally matches reality — see, for instance, Koch-Funded Study Finds ‘Global Warming Is Real’, ‘On The High End’ And ‘Essentially All’ Due To Carbon Pollution. See also Tamino, who has some good posts on the paper. And see NOAA (2013): ‘Robust, Unambiguous’ Independent Evidence Confirms The Recent Global Warming Measured By Thermometers.
And speaking of inane, there is a manufactured dust-up on twitter that somehow posting a blog piece on Easter Sunday is like making an unpopular political announcement on a Friday. But in fact, unlike Friday afternoon, Sunday is a great day to post a piece if you want high readership and traffic, as anyone who blogs regularly should know. If someone didn’t want a blog article to be read, they simply wouldn’t post it!
Here is an excerpt of the RealClimate post by Sean Marcott and his coauthors about their paper: