Category Archives: Multiproxy Studies

The Mystery in Kenya

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.

Mann 2008: the Briffa MXD Network

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 […]

Say My Name

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 […]

The Mann Correlation Mystery

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 […]

Jeff Id

Another interesting post from Jeff Id: http://noconsensus.wordpress.com/2008/09/20/online-experiment-with-the-latest-hockey-stick/

Mann 2008: the Luterbacher Mystery

Jeff Id has identified another intriguing mystery in the arduous problem of determining what Mann’s realdata was. Jeff observed that the version of the Luterbacher lutannt10 series in Mann’s infilled data version allproxy1209 was different than the version of lutannt10 in allproxyoriginal (Sep 5 version), illustrating this as below: I’ve verified this information; below is […]

Hansen's Kingsnorth Testimony

A reader writes in about Hansen’s submission at the Kingsnorth trial. I’m posting up a thread under a couple of conditions. Hansen’s take on scientific matters is influential and important and discussion of scientific topics will be permitted. Please do not post on anything that remotely touches on policy. Please do not make posts complaining […]

Mann 2008: the Bristlecone Addiction

I see that the BBC is taking the position that the “evidence” of an MWP-modern differential now is confirmed in so many “independent” studies that the matter is now “incontrovertible”. However these studies are not “independent”; the vast majority of the “independent” studies use the same stale proxy data. In my Erice presentation (which I’ll […]

Mann 2008: Impact of the Missing Data

Jeff Id has an interesting post in which he examines the 148 “missing” series. Check it out. I haven’t verified the calculation, but will do so. I submitted a comment at his blog observing that the two “Fisher” series are actually Dahl-Jensen borehole reconstructions from Greenland. These two series were said to have been used […]

Will the Real Slim Shady Please Stand Up? Re-Mix.

There’s an amusing little incident with the deleted “original” data set that was posted up for a few minutes at Mann’s website – you know, the data set that was first demonstrably referenced by a CA reader in the early morning of Sep 5. (I’ll reserve comment for now on issues relating to the timestamp […]