date: Thu, 26 Jun 2003 14:23:00 -0400
from: Edward Cook <drdendro@ldeo.columbia.edu>
subject: Re: IMAGES meeting extended abstract
to: Keith Briffa <k.briffa@uea.ac.uk>

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Hi Keith,

With suitable revision, do you think that what I have written could 
go into The Holocene as a Forum article? I think that there is still 
enough controversy and uncertainty about all of this stuff that a 
Forum article would be justified. I still get a number of inquiries 
about the Esper paper and recently was invited by Crowley to talk at 
Duke (same meeting  Phil was at). Let me know what  you think.

Ed

>Ed tried to ring but this will do
>Have read the abstract and my comments are
>1/ thanks for keeping me in the loop and the citations
>2/ reads well , and quaint at times
>3/ page 2 half way down - the 2out of growing season2 signal could 
>also arise through the winter climate preconditioning the growing 
>season climate ( ie cold winter = delayed soil thawing, or dry 
>reducing groundwater recharge etc).
>4/ bottom of page with Figure 6 in - you say not clear why ECS has 
>highest amplitude. Partly as  you have scaled low-frequency against 
>Mann ( but you cover this later)
>5/ next page - a third way down - our purpose in re-calibrating ECS 
>against high frequency data was not to say that was the "right" way 
>- but only to demonstrate the sensitivity in the absolute amplitude 
>of early fluctuations (trends) to the calibration procedure 
>(important if the reconstruction is to be used to define the 
>sensitivity of EBMs - such as in Crowley's work.
>Your point at the end re the 500-1000 year variability is well taken 
>- and re-emphasised by spectra of the long Fennoscandian or Russian 
>(or composite Eurasian ) curves I et al have produced.
>
>ALL THE ABOVE ARE COMMENTS FOR DISCUSSION  AND I WOULD NOT SUGGEST 
>THE CHANGE OF EVEN A SINGLE CURVE.
>I would just mention that the lack of coherence in the below 20-year band
>should be explored more , through the local/regional calibration of 
>the data and aggregation of reconstructions - as we will do  - won't 
>we?
>Keith
>
>
>At 09:51 AM 6/26/03 -0400, you wrote:
>>Hi Keith,
>>
>>Here is an extended abstract of a talk I am giving at the IMAGES 
>>Workshop to be held in Norway in August. Because it touches on a 
>>number of issues relating to the Esper et al. (2002) work, 
>>including some of yours, I am sending it to you for comments. I 
>>need to send it to the meeting convenor by Friday, so any changes 
>>you want  me to make must be sent to me by Friday afternoon your 
>>time. I don't think that there is anything in it that you would 
>>STRONGLY disagree with.
>>
>>I am NOT sending it to Phil or Mike for comments, but I am sure 
>>they will see it at some point. Bradley will too since he will be 
>>at the workshop as well.
>>
>>Cheers,
>>
>>Ed
>>--
>>==================================
>>Dr. Edward R. Cook
>>Doherty Senior Scholar and
>>Director, Tree-Ring Laboratory
>>Lamont-Doherty Earth Observatory
>>Palisades, New York 10964  USA
>>Email:  drdendro@ldeo.columbia.edu
>>Phone:  845-365-8618
>>Fax:    845-365-8152
>>==================================
>>
>
>--
>Professor Keith Briffa,
>Climatic Research Unit
>University of East Anglia
>Norwich, NR4 7TJ, U.K.
>
>Phone: +44-1603-593909
>Fax: +44-1603-507784
>
>http://www.cru.uea.ac.uk/cru/people/briffa/


-- 
==================================
Dr. Edward R. Cook
Doherty Senior Scholar and
Director, Tree-Ring Laboratory
Lamont-Doherty Earth Observatory
Palisades, New York 10964  USA
Email:	drdendro@ldeo.columbia.edu
Phone:	845-365-8618
Fax:	845-365-8152
==================================
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