Here is Lamarche’s diagram of altitudes at the key bristlecone sites of Sheep Mountain and Campito Mountain (as noted below, when wood erosion is allosed for, the post-MWP decline is placed after 1500.)
Valmore Lamarche was perhaps the first person to suggest that temperature information could be extracted from bristlecone pine information and his early publications are often referenced. Lamarche et al. [1984] (with Fritts, Graybill and Rose) first postulated CO2 fertilization. As you know, I’m increasingly interested in changes in treeline elevation as a "low-frequency proxy". It […]
An Op Ed by David Legates of the University of Delaware in today’s National Post, entitled Where’s the data?: Holding science to prospectus standards would stop climate researchers from launching misrepresentations like the ‘Hockey Stick’ By: David Legates
Since I showed the effect of smoothing on the relationship of Dunde to temperature, I thought that it would be useful to post up a table showing the Jones et al [1998] proxy correlations to temperature versus my calculations using HadCRU2.
Thompson’s Dunde ice core is an extremely important proxy in multiproxy studies. There has been an increase in dO18 levels in the 20th century. Whether this is a proxy for temperature is not at all obvious on physical grounds. The relationship between dO18 and temperature in monsoon ice caps is opposite to that of polar […]
I’m asked from time to time for references on statistics. I’m going to start posting up some links and references in a Page (see right frame). Here’s one that I noticed which is both an excellent introduction to R and to statistics. John Verzani, Using R for Introductory Statistics The nice thing about R packages […]
Esper uses 14 sites in his reconstructions. My objective is to see which ones are "active ingredients" in yielding a high 20th century relative to MWP. Today, I’ll look at the "Quebec" site on the east side of Hudson Bay, which does not solve the problem. In fact, the acknowledged authors report of a site […]
Huybers’ second and more interesting (to me) issue pertains to the benchmarking of the RE statistic.I’m going to start in the middle of this issue. If I start with the history e.g. defining the RE statistic and showing its history (and I just tried), it’s hard to get to the punch line. So what I’m […]
An article by Peter Huybers has been accepted at GRL together with our Reply. I’m going to give a preview of this. This will take a few posts.
I’ve had an abstract accepted for the U.S. Climate Change Science Program (CCSP) Workshop, "Climate Science in Support of Decisionmaking," to be held November 14-16, 2005. My abstract is entitled: "More on Hockey Sticks: the Case of Jones et al [1998]".
Climate Audit 
Legates Op Ed
An Op Ed by David Legates of the University of Delaware in today’s National Post, entitled Where’s the data?: Holding science to prospectus standards would stop climate researchers from launching misrepresentations like the ‘Hockey Stick’ By: David Legates