cc: Eystein Jansen <eystein.jansen@geo.uib.no>, Keith Briffa <k.briffa@uea.ac.uk>, "Ricardo Villalba" <ricardo@lab.cricyt.edu.ar>
date: Wed, 5 Jul 2006 14:46:45 -0600
from: Jonathan Overpeck <jto@u.arizona.edu>
subject: Fwd: Borehole in the Southern Hemisphere
to: hpollack@umich.edu

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Hi Henry - hope you're having a nice summer. I just got back from the 
IPCC mtg where we made plans for generating the final draft of our 
paleo chapter. One question that came up is whether we can show (in 
Fig 6.12 - southern hemisphere climate records of the last 
millennium) your borehole recon for southern Africa. As you can see 
below, Jason Smerdon has told our SH lead, Ricardo Villalba that the 
recon we've used is not yet published. The question for you is 
whether we can/should use a version that IS published, We feel your 
recon is an important one to show as it represents a region not 
represented by other good reconstructions. But, we don't want to use 
something that has proven to be wrong.

We appreciate your input on this issue. Also, if there is a published 
recon that we can use, would you pls send the recon (guess it's only 
one value per century, right?) and the ref we should cite?

As you can imagine, we're under a tough time constraint, so if you 
can let us know as soon as you can, that would be great.

Many thanks, Peck


>X-Sieve: CMU Sieve 2.2
>From: "Ricardo Villalba" <ricardo@lab.cricyt.edu.ar>
>To: "Keith R. Briffa" <k.briffa@uea.ac.uk>,
>	"Jonathan Overpeck" <jto@u.arizona.edu>
>Subject: Borehole in the Southern Hemisphere
>Date: Thu, 29 Jun 2006 06:00:20 -0300
>
>Hi Keith and Peck,
>Please, find below a copy of the message that I got from Jason Smerdon,
>regarding the South African borehole record. It looks that the record as it
>is shown in Figure 6.12 has not been published, however former versions of
>the South African reconstruction have been included in at least two papers.
>Please, let me know your impressions to proceed with this matter. Cheers,
>Ricardo
>
>----- Original Message -----
>From: "Jason Smerdon" <jsmerdon@ldeo.columbia.edu>
>To: "Ricardo Villalba" <ricardo@lab.cricyt.edu.ar>
>Sent: Wednesday, June 28, 2006 8:09 PM
>Subject: Re: Publication in JQR
>
>
>>  Hi Ricardo,
>>
>>  I believe that you are referring to the reconstruction from the Southern
>>  Africa holes that we provided to Tim Osborn.  That reconstruction has not
>>  been published as a time series as it is shown in Tim's figure.  I
>>  believe, however, that the same reconstruction was published as a
>>  histogram in the following reference:
>>
>>  Huang S, Pollack HN, Shen PY. 2000. Temperature trends over the last five
>>  centuries reconstructed from borehole temperatures. Nature 403: 756-758.
>>
>>  The only thing that might be different is the number of holes that were
>>  used, but I don't think that part of the dataset has been updated since
>>  Huang's 2000 paper.  To confirm this I would encourage you to contact
>  > Henry Pollack at hpollack@umich.edu.  He will know for sure.  A similar
>>  reconstruction using a subset of the Southern Africa holes is referenced
>>  in the Australian paper:
>>
>>  Tyson PD, Mason SJ, Jones MQW, Cooper GRJ. 1998. Global warming and
>>  geothermal profiles: The surface rock temperature response in South
>>  Africa.  Geophysical Research Letters 25: 2711-2714.
>>
>>  But the reconstruction will of course not be exactly equal to the larger
>>  Southern African reconstruction that we provided for Tim.  I hope this
>>  helps and let me know if I can be of any further assistance.
>>
>>  Jason
>>
>>  On Wed, 28 Jun 2006, Ricardo Villalba wrote:
>>
>>  > Dear Jason,
>>  >  Thanks for the preprint. Do you know if the South African borehole
>records
>>  > has been published? Thanks,
>>  > RIcardo
>>  >
>>
>>


-- 
Jonathan T. Overpeck
Director, Institute for the Study of Planet Earth
Professor, Department of Geosciences
Professor, Department of Atmospheric Sciences

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