Tuesday, December 20, 2011

1148577381.txt

From: "Michael E. Mann" <mann@meteo.psu.edu>
To: Keith Briffa <k.briffa@uea.ac.uk>
Subject: Re: expert review comments on AR4
Date: Thu, 25 May 2006 13:16:21 -0400
Reply-to: mann@psu.edu

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Hi Keith,

here is the submitted comment by Tapio Schneider, attached. Please do
not pass along or show to others. Thanks in advance,

mike

Keith Briffa wrote:

> Hi Mike
> thanks for these comments and especially thanks for your remarks on
> the effort of trying to produce a balanced picture of the current
> state of things in the IPCC Chapter 6. In fact , I know that it is
> already out of date and I am going to get particularly lambasted for
> not discussing problems with recent tree responses to warming and
> potential problems wit CO2 fertilization - I may have to add even more
> text yet .You are absolutely correct that we had unreasonable trouble
> from Susan , who was not as "hands off" as she might have been. I will
> certainly study your comments carefully - as I always do . I would
> rather reserve comment on the Crowley reconstruction til I speak
> personally to you. I really hope that we can get an atmosphere of
> constructive discussion that , I believe, must include some discussion
> of the sceptics . Look forward to those drinks and some time away from
> the mad house of teaching/exam marking etc. See you soon
>
> best wishes
> Keith
>
> At 18:08 24/05/2006, you wrote:
>
>> Hi Keith,
>>
>> I wanted you to have an advance copy of the comments I'll be
>> submitting on the final draft of the AR4. I commend you for the
>> excellent work you've done and the tough battle I know you have had
>> to fight. I don't envy it, and you know the tough battles I've been
>> through.
>>
>> Confidentially, I do have a number of specific concerns mostly in
>> the area of discussions of where things actually now stand in terms
>> of some of the earlier criticisms. I believe that the discussion is
>> still out of date, given what has been shown in recent publications,
>> including Wahl and Ammann (Science). Also, and I don't think this is
>> the only place you're going to hear this from, there are deep
>> problems w/ Hegerl et al '06, particularly the claims of what TLS can
>> do, which are egregiously incorrect. There is a comment in review in
>> Nature (not me, but I can promise you, by someone who understands the
>> statistical issues involved better than anyone else in our community)
>> that is very critical. I think its unwise for the TAR to
>> uncritically accept the claims made, particularly given that the
>> actual J. Climate paper was in limbo at least at the time the most
>> recent draft was finalized. I believe that disqualifies it for
>> consideration for AR4, no?
>>
>> Also, I think it is an absolute travesty that figure 6.10 isn't being
>> shown in the SPM. I think that is unforgiveable, and there should be
>> an effort to over-ride that decision (I would suspect that is Susan
>> Solomon's doing?),
>>
>> I hope we can discuss these things (and much else) over a few beers
>> in Switzerland. Looking forward to seeing you soon,
>>
>> mike
>>
>> --
>> Michael E. Mann
>> Associate Professor
>> Director, Earth System Science Center (ESSC)
>>
>> Department of Meteorology Phone: (814) 863-4075
>> 503 Walker Building FAX: (814) 865-3663
>> The Pennsylvania State University email:
>> <mailto:mann@psu.edu>mann@psu.edu
>> University Park, PA 16802-5013
>>
>> <http://www.met.psu.edu/dept/faculty/mann.htm>http://www.met.psu.edu/dept/faculty/mann.htm
>>
>>
>
> --
> 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/

--
Michael E. Mann
Associate Professor
Director, Earth System Science Center (ESSC)

Department of Meteorology Phone: (814) 863-4075
503 Walker Building FAX: (814) 865-3663
The Pennsylvania State University email: mann@psu.edu
University Park, PA 16802-5013

http://www.met.psu.edu/dept/faculty/mann.htm

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Attachment Converted: "c:\eudora\attach\hegerl06_comment.pdf"

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