Tag Archives: khadyta

What Happened to Polar Urals?

Jan 4, 2010 – 9:57 AM

Addiction of paleoclimate reconstructions to particular proxies has been a longstanding concern at Climate Audit. One of the battleground issues has been the addiction to Briffa’s Yamal tree ring series, while the nearby update of Polar Urals (with a pronounced MWP) was disappeared. (See CA category.) Just before Climategate, we raised questions about the Yamal […]

By Steve McIntyre | Posted in climategate, Yamal and Urals | Also tagged | Comments (50)

Is Yamal Homogeneous? An Esper-Style Answer.

Nov 11, 2009 – 2:58 PM

Starting with the first of my recent posts on Yamal, I raised the issue of whether the CRU 12 actually came from a homogeneous population to the subfossil population. Although Briffa’s online response to my Yamal posts stated that CRU has “stressed” potential problems arising from “inhomogeneous” sources” in their “published work”, I have been […]

By Steve McIntyre | Posted in Briffa, Yamal and Urals | Also tagged , , | Comments (77)

Yamal and the Divergence Problem

Oct 7, 2009 – 8:18 AM

One of the aspects of the Yamal discussion that is perhaps clearer to regular CA readers than to new readers is that Briffa’s Yamal chronology was very different from ring width chronologies previously reported in the area (including by Briffa itself.) Shortly after the publication of Osborn and Briffa 2006 and D’Arrigo et al 2006 […]

By Steve McIntyre | Posted in Briffa, Yamal and Urals | Also tagged | Comments (243)

Keith Briffa Responds

Oct 1, 2009 – 10:47 AM

In spite of suffering a serious illness (which I understand to be a kidney problem), Keith Briffa has taken the time to comment on the Yamal situation. The comment should be read by interested readers. If Briffa or any of his associates wishes to post a thread here without any editorial control on my part, […]

By Steve McIntyre | Posted in Briffa, Yamal and Urals | Also tagged , | Comments (265)

Yamal: A “Divergence” Problem

Sep 27, 2009 – 10:08 AM

The second image below is, in my opinion, one of the most disquieting images ever presented at Climate Audit. Two posts ago, I observed that the number of cores used in the most recent portion of the Yamal archive at CRU was implausibly low. There were only 10 cores in 1990 versus 65 cores in […]

By Steve McIntyre | Posted in Briffa, Yamal and Urals | Also tagged | Comments (477)
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