date: Fri Oct  6 07:55:19 2000
from: Phil Jones <p.jones@uea.ac.uk>
subject: Re: Power spectral figure for the TAR
to: Myles Allen <M.R.Allen@rl.ac.uk>


 Myles,
    It is the sort of thing we plan to do. Tim is off next week to spend
 2 weeks with Mike in Charlottesville.

 Cheers
 Phil


At 05:19 PM 10/5/00 +0100, you wrote:
>Hi Phil,
>
>Thanks for checking that -- doing the same thing with Mann et al would
>obviously be interesting, but without subsampling and processing the
>controls in the same way the observations have been massaged in his
>reconstruction, I'm not sure how meaningful the results would be.  Isn't
>think pretty much what you're doing with Keith and Tim on that NERC
>project I reviewed?  
>
>The nice thing about the obs-minus-all-forcings case is that all the main
>sources of bias in the observed spectrum are to over-estimate the variance
>on all timescales, giving a defensible upper bound.  I can imagine a lot
>of the processing the Mann et al series has been through rather bleaching
>the colour out of it.
>
>Myles
>
>----------------------------------------------------------------------
>Myles R. Allen				Phone (RAL):	44-1235-446480
>Space Science & Technology Department	Ph (Oxford):	44-1865-272085
>Rutherford Appleton Laboratory		Fax:		44-1235-445848
>Chilton, Didcot, OX11 0QX		e-mail:	    m.r.allen@rl.ac.uk
>United Kingdom			 http://www.climate-dynamics.rl.ac.uk/
>----------------------------------------------------------------------
>
>On Thu, 5 Oct 2000, Phil Jones wrote:
>
>> 
>>  Myles,
>>     You have my data in OK. The warmth of the last few years seems to
>>  be having an effect. Have you tried a similar exercise with the Mann et al.
>>  data ?
>> 
>>  Cheers
>>  Phil
>> 
>> Prof. Phil Jones
>> Climatic Research Unit        Telephone +44 (0) 1603 592090 
>> School of Environmental Sciences    Fax +44 (0) 1603 507784 
>> University of East Anglia                      
>> Norwich                          Email    p.jones@uea.ac.uk 
>> NR4 7TJ
>> UK
>> 
>> ----------------------------------------------------------------------------
>> 
>>     
>> 
>
>
