Tag Archives: dulan

Dulan Response Coefficients

Apr 16, 2007 – 4:42 PM

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 […]

By Stephen McIntyre | Posted in Proxies | Comments (36)

Dulan Satellite Photo

Apr 14, 2007 – 2:33 PM

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 […]

By Stephen McIntyre | Posted in Proxies | Comments (10)

The Tree in the Desert

Apr 14, 2007 – 11:43 AM

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”.

By Stephen McIntyre | Posted in Proxies | Comments (18)

The Three-Core Chronology

Apr 12, 2007 – 9:15 AM

As noted yesterday, Jacoby and Cook didn’t get the memo about not using the Dulan juniper chronology of Wang et al 1983 (also used in Crowley and Lowery 2000) and used it in a panel diagram in Gou et al [Ann Glac 2006]. Wang et al 1983 is unusual in a dendroclimatic publication, because they […]

By Stephen McIntyre | Posted in Proxies | Comments (45)

A Reply to an Angry Dendroclimatologist

Apr 11, 2007 – 8:51 AM

In a recent post, I challenged the Dendro Truth Squad to root out use of precipitation proxies in multiproxy studies (which the NAS Panel also encouraged avoidance of). Instead of illustrating this with bristlecones one more time (although they obviously occur in a high desert), I illustrated the challenge with the example of Dulan junipers, […]

By Stephen McIntyre | Posted in Divergence, Proxies | Also tagged , | Comments (30)

Dulan Junipers and the Silk Road

Apr 9, 2007 – 10:32 AM

When I was a teenager, I liked Joseph Conrad’s books (which bear re-reading as an adult). I remember reading Younghusband’s account of his travels in Sinkiang. These books undoubtedly were a reason why I traveled round the world when I was 20, going to some out of the way spots. The Dulan junipers, which we’ve […]

By Stephen McIntyre | Posted in Proxies | Also tagged | Comments (26)