Two new things on the Divergence Problem. The IPCC First and Second Drafts did not contain a whisper of a mention of the divergence between ring widths and density in the second half of the 20th century, although this is rather an important issue. It came up at the NAS Panel and was completely unresolved […]
Al Gore’s hockey stick version (page 65 of the book “An Inconvenient Truth“) is taken from one of the many conflicting versions of Lonnie Thompson’s ice core data. Now there is an ongoing controversy about whether Thompson’s data is a temperature or precipitation proxy, with pretty much every other scientist except Thompson now viewing the […]
The recent success in getting at least some data from Phil Jones – which he had obstructed since my original request in 2003 – has caused me to refresh my attempts to get Lonnie Thompson to archive his data so that the scandalous inconsistencies between different versions can finally be appraised. Last year, he published […]
I said that I post the graphic from Loso et al if someone sent it to me today. In fact, Loso et al is online here and interested parties can consult it for themselves. I don’t have time to comment on this study other than very briefly, but here are some of the key graphics.
In our continuing quest for a North American upper treeline chronology that exemplifies the IPCC AR4 claim that additional data since TAR shows “coherent behavior” across multiple indicators, we turn now to the upper treeline proxies of Wilson and Luckman, 2002, 2003. They collected 20 Engelmann spruce sites in British Columbia in 1998, which together […]
A standard technique of dendroclimatologists is to calculate coefficients between ring width chronologies and monthly temperature and precipitation for 12-18 months relevant to the annual growth. twq has reiterated to us that Gou et al 2007, which is a few minutes off the press, has claimed high correlations to temperature of a site in the […]
Here’s another gridcell where CRU has truncated high early values. This is the gridcell that contains the important Jacoby Mongolian tree ring series. If untruncated gridcell information is used, then the ring width chronology has a negative correlation to gridcell temperature. What a swamp.
No one will accuse me of arguing that Dulan junipers are a proxy for temperature. But twq has been to Dulan and says that they are. So let’s take twq’s assertion at face value and, a la O.J. Simpson, let’s reluctantly explore what happens if Dulan junipers were a temperature proxy as twq says. A […]
Willis has posted a beautiful satellite photograph of the Dulan region upon which I’ve marked the locations of Delingha, Dulan and the Gou et al 2007 sample location. I’ve also posted up several location maps discussed recently which are clarified by reference to the satellite photo. Something fun about this picture – the Dunde ice […]
We’ve had some interesting discussion of the following picture of a tree in the desert which was the closing slide in a presentation by Shao et al here entitled “A Dendroclimatic Study of Qilian Juniper in the northeast Qinghai-Xizang (Tibet) Plateau”.
Climate Audit 