Category Archives: Multiproxy Studies

Moberg #4: Lake Tsuolbmajavri

Moberg et al. [2005] use the July temperature reconstruction of Korhola et al. [2000] using Lake Tsoulbmajavri diatoms as one of 11 low-frequency proxies, as shown in Figure 4 of Korohla et al. reproduced below. There is obviously nothing in this reconstruction that is inconsistent with a pre-hockey stick view of climate history. . (Original) […]

Post-1980 Proxies #3: Chesapeake Bay Mg/Ca

The Chesapeake Bay Mg/Ca proxy goes to late 1995 and is used in both Moberg et al [2005] and Mann and Jones [2003] for the proxy reconstructions up to 1980. Figure 1 below shows that its post-1980 behavior does not show an exceptional response to supposedly unprecedented temperature. Figure 1. Chesapeake Bay Spring SST. Re-plotted […]

Collation of Moberg Data

I’ve written a script in R to collate Moberg data from original sources (plus 3 collations of tree ring site chronologies which I’d done previously and 1 digitized version sent to me). This is a working document and subject to change as more information becomes available, but is posted here in case other people are […]

Quelccaya Accumulation

Quelccaya accumulation are 2 of only 14 proxies in MBH99. I think that it was the very first Mann proxy series that I posted about (circa May 2003), as the underlying data looked very strange when plotted. Hans Erren has posted up an interesting analysis which both explains the strange appearance of the series as […]

Moberg #3: Some First Comments

I’ve collated public versions of Moberg data to the extent possible and have posted up some comments from a first inspection of the data, including the apparent avoiding of ice core dO18 series, prominent in Hockey Team studies. I’ll post up a script collating the data into R if anyone’s interested. Moberg doesn’t directly use […]

Moberg et al [2005] #2

Moberg et al. [2005] was published today in Nature. It is an almost unique study because none of the authors are on the Hockey Team (although Moberg has co-authored with Jones in the past) and is virtually the first somewhat independent multiproxy study. The figures in the study are small-scale and the instrumental record is […]

The Updated Gaspé Series

We have focused considerable attention on the role of the Gaspé series in MBH98. While we alluded previously in MM05 (E&E) to information in our possession that the updated (1991) version of the series differed from the 1982 version and to our frustration that the updated version remains unarchived (see Jacoby #1) , we are […]

Moberg et al. [2005]

I’ve heard rumors that a new reconstruction from Moberg et al. is about to be published in Nature and it looks like it’s going to be more bad news for Mann et al. Here is a clip from a PDF posted up by Moberg in October 2004, but obviously not incorporated into the spaghetti diagrams […]

Thompson # 1: Inconsistent Dunde Versions

The Dunde (Himalayas) ice core is a staple of multiproxy studies (MBH98, Crowley and Lowery [2000], Yang et al [2002] used in Jones and Mann [2003], Jones and Mann [2004]). It was one of 4 series that contributed the only hockey-stick-ness to the results – see here . Although the core was taken over 17 […]

Jacoby #1: A "Few Good" Series

Jacoby is on the Hockey Team. His treeline temperature reconstruction was made by picking the 10 most "temperature-influenced" of 36 sites studied. Only these 10 sites were archived. I sought information on the other 26 through Climatic Change, the publishing journal. Jacoby refused, stating: The inquiry is not asking for the data used in the […]