Do not post anything other than programming comments. Absolutely no piling on please.
I’ve adopted a graphic from the R-gallery to better illustrate the issues that we’re working on with the Mann proxy correlations. I think that this should help. Figure 1. Scatter plot of calculated gridcell correlations to Mann SI correlations, color coded by “proxy” class, together with marginal histograms. The dotted red lines show r=0.14, a […]
On September 15, 2008, Anthony DePalma of the New York Times wrote an article about the Mohonk Lakes USHCN weather station titled Weather History Offers Insight Into Global Warming. This article claimed, in part, that the average annual temperature has risen 2.7 degrees in 112 years at this station. What struck me about the article […]
Update Sep 24 – I suggest that you start with a later post here. The purpose of working through frustrating details of Mannian lat-longs and so on was to start testing the assertion that the network contained 484 “significant” proxies and that this meant something. As so often, there’s more to this than meets the […]
On July 2, I started this popular series of threads as follows: For anyone who’s betting that 2008 meltback will exceed 2007 meltback, I think that you’ll be able to pretty much know where you stand by the end of this week and your chances are not looking good right now based on this week’s […]
Today’s Mannian mystery takes us to Kenya Tanzania, not to Kilimanjaro itself, but to the great plains, still home to prides of lions, herds of wildebeest and giraffes.
Those who forget the past are condemned to repeat it. The SI for MBH (and Mann et al 2007) had incorrect geographic locations for numerous proxies. The same error is repeated in Mann et al 2008, a defect encountered by Jeff Id and myself in trying to replicate reported correlations to gridcell temperatures. Nearly 100 […]
In an online trailer for a new climate documentary, James Hansen, presumably exhausted from answering “niggling questions” at a gala Lehman Bros dinner tells the film-maker: I’m not going to use McIntyre’s name. The problem of name usage has been recently considered in several important philosophy workshops and conferences. On the top right, I linked […]
A data set that was almost as controversial in MBH98 as the Graybill bristlecones was the Gaspé cedar chronology used by Jacoby and d’Arrigo. An interesting new cedar chronology from Quebec has just appeared at NCDC, shown below. The third chronology shown below is an unreported update to the Gaspé series. I reported the unreported […]
Here’s another interesting mystery in Mann et al 2008. Their SI table rtable1209 reports correlations to 1850-1995 instrumental temperature. The correlations reported in their PNAS SI Table SD1 sets all but 484 “significant” values to NA, so the r1209 table is more comprehensive. The instrumental version supposedly used in their calculations is now archived at […]
Climate Audit 