Also, if possible, would you please tell me about the data of this paper?

Loren D. Meeker and Paul A. Mayewski: 1400-year record of atmospheric circulation
over the North Atlantic and Asia, the Holocene, 2002, 12, 3, 257-266.

Thank you very much in advance!

I don’t guarantee that the following is correct as I’ve not used this data myself. It’s my best guess as to where the data comes from. You’ll have to plot up the series and compare to tell for sure. (It’s too bad that authors don’t regularly provide exact data citations.)
ftp://ftp.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/summit/gisp2/chem

Steve’s e-mail is smcintyre25 AT yahoo.ca

regards, Bao Yang

Bao Yang

A digital version of the Jacoby chronology has not, to my knowledge, been published. Two vesions are shown below, the first of which says it was scanned.
ftp://ftp.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/jones2004/jonesmannrogfig4d.txt
ftp://ftp.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/osborn2006/osborn2006.txt

Measurement data has been archived back to AD900 only, with the authors saying that the reconstruction is unreliable prior to that (despite publishing).
ftp://ftp.ncdc.noaa.gov/pub/data/paleo/treering/measurements/asia/mong003.rwl

I’ll see what I can locate on Meeker-Majewski for you.

Cheers, Steve McIntyre

I am sorry to bother you. I need your help. I saw a paper below.

D’Arrigo, R., Jacoby, G. C., Frank, D. C., Pederson, N., Cook, E., Buckley, B., N
achin, B., Mijiddorj, R., and Dugarjav, C. (2001). 1738 Years of Mongolian Temper
ature Variability Inferred from a Tree-Ring Width Chronology of Siberian Pine. Ge
ophysical Research Letters 28, 543-546.

I can not find the related data of 1738 years tree ring data. Would you please te
ll me how to get the data?

Also, if possible, would you please tell me about the data of this paper?

Loren D. Meeker and Paul A. Mayewski: 1400-year record of atmospheric circulation
over the North Atlantic and Asia, the Holocene, 2002, 12, 3, 257-266.

Thank you very much in advance!

Best regards,
Bao yang

As is well-known, I’ve been quite troubled by potential problems arising from the use of tree ring chronologies in sites which are both cold and very arid – such as the bristlecone pines in the U.S.
I’ve also been troubled by the difficult issues involved in testing for statistical significance between trending series and how to test for “spurious regression”.

The implied history of the various proxies here is obviously quite different. While Dr Yang refers to the fact that he obtained quite similar results under three different weighting schemes, I don’t think that these 3 weighting schemes in any sense exhausted robustness issues – as mere inspection of the graphs of the underlying series shows.

On Dulan, I remain concerned about using junipers as a temperature proxy. Dr Yang, you mentioned a new data set from Shidalong – what type of trees are these? Is there some ecological information on the site? Has it been published yet?

On Dunde, I’ve posted up here about the problem of inconsistent versions of this series which have been distributed by Thompson. It is no fault of Dr Yang that Thompson failed to archive source data and then distributed different grey versions. However, the different Dunde versions need to be reconciled from original data. I have attempted to get Science to enforce their data policies and require Thompson to provide this data – see here. Since the Dunde versions are quite different, this means that estimates of their correlation to temperature need to be carefully examined depending on which version was used.

As I mentioned in a post on Dunde here, I was unable to verify Thompson’s claimed correlations in a cross-validation calculation.

I appreciate the cordial tone of your post. Cheers, Steve Mc