Author Archives: Stephen McIntyre

Cook et al. [2004]

What is ironic in Mann’s citation of Cook as authority that paleoclimatologists need not provide a range of verification statistics is that Cook et al. [2004] actually provide a suite of verification statistics, headed by the R2 statistic, which Mann et al. now object to.

Our research covered in the National Post

There has been extensive coverage of our research in the National Post, a leading Canadian newspaper, over the last few days. The entire article from Natuurwetenschap & Techniek was re-printed in two installments, together with a National Post editorial, all of which are online: Breaking the hockey stick The lone Gaspé cedar Let the science […]

Climateaudit

I’ve set up this blog at the suggestion of John A., of England, a computer consultant interested in climate change. I had posted some thoughts at http://www.climate2003.com, but it was difficult to post up comments on that layout. So John located a more appropriate host, converted past musings to blog layout and set up the […]

New research published on MBH98

We (McIntyre and McKitrick) are profiled in the cover story of the Feb. 1, 2005 edition of Natuurwetenschap & Techniek (NWT), a prominent European science magazine (both Dutch and English versions at http://www.natutech.nl ). The cover story is based on two new peer-reviewed papers being published in the well-known science journals Geophysical Research Letters and […]

Spot the real Hockey Stick…

Here is a postscript version and pdf version of the graphic showing simulated PC1s with a hockeystick shape and the MBH98 Northern Hemisphere reconstruction. Can you find the “real” MBH98 hockeystick?

AGU Meeting

[Climate Audit was started on Jan 31, 2005. Prior to its startup I had some notes at a prior website http://www.climate2003.com, which John A transferred to the CA blog at its start-up.] The AGU conference is unbelievably big. I’m told there were over 10,000 people there. The printed program is 512 pages long and for […]

Rutherford et al [Journal of Climate 2004]

[Climate Audit was started on Jan 31, 2005. Prior to its startup I had some notes at a prior website http://www.climate2003.com, which John A transferred to the CA blog at its start-up.] The Dec. 4 post “False Claims” refers to an article by Mann and his associates [Rutherford et al. 2004], supposedly discrediting our work. […]

Robustness

[Climate Audit was started on Jan 31, 2005. Prior to its startup I had some notes at a prior website http://www.climate2003.com, which John A transferred to the CA blog at its start-up.] If 2 PCs are used in the AD1400 North American network along with conventional (centered) PC calculations, we argued in our Nature submissions […]

www.realclimate.org

[Climate Audit was started on Jan 31, 2005. Prior to its startup I had some notes at a prior website http://www.climate2003.com, which John A transferred to the CA blog at its start-up.] Mann and some of his colleagues have set up a blog at the above address. A couple of Mann’s first postings have been […]

Hasn’t Mann’s data "always" been available?

[Climate Audit was started on Jan 31, 2005. Prior to its startup I had some notes at a prior website http://www.climate2003.com, which John A transferred to the CA blog at its start-up.] There’s a difference between the underlying proxy data, source code and supporting calculations, and the situation is different for each category. Proxy data: […]