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 […]
Willis Eschenbach asked the editor of Climate Dynamics to require the authors of Wilson et al 2007 to archive their data. The editor wrote back that, since the authors had provided the latitude and longitude of the samples, this was sufficient information to permit another laboratory to replicate their results and that it was not […]
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.
I’ve described in the past how the U.S. government has adequate policies for data archiving on paper, but that NSF had been totally co-opted by non-compliant scientists and their administration of data archiving could be described only as ineffective or non-existent. Doug Keenan wrote in on some calls to NSF: NSF grant conditions are specified […]
Here’s another strange CRU gridcell in which warm early values of Huhehaote aren’t used.
Yesterday, we had two curiosities from comparing GHCN data to HadCRU3 data – the apparent inconsistency between the HadCRU3 version in some gridcells e.g. 27.5N 117.5E and the apparent termination of much GHCN station data in 1990. Accordingly I collected all stations in the GHCN v2 data base from this gridcell and compared them with, […]
A couple of days ago, I reported on the comparison of Jones et al 1990 data to the TR055 data archived at NCDC, noting that the data was the same for all but one series. I’ve now been comparing the TR055 versions to GHCN v2 and HadCRU3 and noticing some puzzling aspects to both GHCNv2 […]
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 