Although climate scientists keep telling that defects in their “hockey stick” proxy reconstructions don’t matter – that it doesn’t matter whether they use data upside down, that it doesn’t matter if they cherry pick individual series depending on whether they go up in the 20th century, that it doesn’t matter if they discard series that […]
In 2011, Andy Revkin wrote an article (archive) entitled “Straight Talk on Rising Seas in a Warming World” (among other articles on the topic), in which he optimistically sought guidance on the topic from a then recent study of U.S. East Coast sea level coauthored by Mann (Kemp et al, 2011). Joshua Willis told Revkin “that, […]
The long-awaited (and long overdue) PAGES2K synthesis of 57 high-resolution ocean sediment series (OCEAN2K) was published a couple of weeks ago (see here here). Co-author Michael Evans’ announcement made the results sound like the latest and perhaps most dramatic Hockey Stick yet: Today, the Earth is warming about 20 times faster than it cooled during the past 1,800 […]
A couple of years ago, Brandon Shollenberger wrote up a lengthy review of Mann’s Hockey Stick Wars at Lucia’s. Brandon has fleshed out his review in an ebook here. Brandon summarized the book as follows: “there is a great deal of misinformation, and even disinformation, polluting the airwaves. One prime example was world renowned […]
In MM05, we quantified the “hockeystick-ness” of a series as the difference between the 1902-1980 mean (the “short centering” period of Mannian principal components) and the overall mean (1400-1980), divided by the standard deviation – a measure that we termed its “Hockey Stick Index (HSI)”. The histograms of its distribution for 10,000 simulated networks (shown in […]
In a recent RC post entitled “Ice Hockey” and a recent Nature article, Steig and coauthors have introduced a novel and very baroque “hockey stick”, one without a blade. A true Halloween of horrors: in addition to Gergis’ zombie hockey stick, the bladeless Hockey Stick of Sleepy Hollow is now at large. The appearance of […]
As some readers have observed, there is a lively controversy regarding an influential recent paper by Reinhart and Rogoff. Herndon et al (of Raymond Bradley’s UMass-Amhertst) concluded that RR’s conclusions depended on a bad weighting method, inexplicable exclusion of data from certain countries and years and even an Excel coding error. All the sorts of […]
I’m writing a response to Gavin Schmidt’s rant about Yamal, which I should finish by tomorrow. Schmidt’s rant does not refute anything in my Yamal post. Indeed, Schmidt barely touches on the actual content of my post. Most of his post has nothing to do with Yamal. In the present post, I’ll deal with the […]
One of Josh’s finest graphic flourishes: (h/t Bishop Hill and WUWT)
Michael Mann in a recent interview “there’s not just a hockey stick — there’s a hockey league.” The Team. The League. h/t Bishop Hill
Climate Audit 