cc: Eystein Jansen , Keith Briffa , "Ricardo Villalba" date: Wed, 5 Jul 2006 14:46:45 -0600 from: Jonathan Overpeck subject: Fwd: Borehole in the Southern Hemisphere to: hpollack@umich.edu 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" >To: "Keith R. Briffa" , > "Jonathan Overpeck" >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" >To: "Ricardo Villalba" >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 Mail and Fedex Address: Institute for the Study of Planet Earth 715 N. Park Ave. 2nd Floor University of Arizona Tucson, AZ 85721 direct tel: +1 520 622-9065 fax: +1 520 792-8795 http://www.geo.arizona.edu/ http://www.ispe.arizona.edu/