Kaufman and paleo peer reviewers ought to be aware that the recent portion of varve data can be contaminated by modern agriculture, as this was a contentious issue in relation to Mann et al 2008 (Upside Down Mann) and Kaufman et al 2009. Nonetheless, Kaufman et al 2013 (PAGES), despite dozens of coauthors and peer […]
The PAGES2K Arctic reconstruction uses Gifford Miller’s Hvitavatn (Iceland) data upside down. The error “matters” because this series is one of rather few PAGES2K series that show a Hockey Stick. Such gross errors ought to be corrected before the data is cited for policy purposes or said to confirm previous studies.
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 […]
This is a cautionary tale, about a mystery that had an unexpected explanation. It’s not intended as a criticism of the scientists involved, and the problem involved, although potentially serious, actually had little impact on the results of the study concerned. However, I am hopeful that mathematically and computing orientated readers will find it of […]
The PAGES2K article to be published tomorrow will show eight regional reconstructions, which are plotted below. In today’s post, I’ll try to briefly summarize what, if anything, is new about them. Antarctica: This is a composite of 11 isotope series (mostly d18O). It includes some new data (e.g. Steig’s new WAIS series) and some long […]
A commenter observed that the forthcoming PAGES2K received over 50 pages of review comments from one reviewer. One wonders what he had to say about the PAGES2K South American network which has some very odd characteristics. Here is a list of proxies with a couple of interesting features highlighted. First, note that the “proxy” network […]
March 15, 2013 was the IPCC deadline for use in AR5 and predictably a wave of articles have been accepted. The IPCC Paleo chapter wanted a graphic on regional reconstructions and the PAGES2K group has obligingly provided the raw materials for this graphic, which will be published by Nature on April 21. Thanks to an […]
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 […]
Nic Lewis’s paper on climate sensitivity is available. See his BH post here. Also see discussion at Judy Curry and WUWT.
Perhaps the greatest single difference between being a “real climate scientist” and policies recommended here is that “real climate scientists” do not hesitate in excluding data ex post because it goes the “wrong” way, a practice that is unequivocally condemned at Climate Audit and other critical blogs which take the position that criteria have to […]
Climate Audit 