date: Fri Jul 12 12:43:41 2002
from: Keith Briffa <k.briffa@uea.ac.uk>
subject: Fwd: Re: your help
to: drdendro@ldeo.columbia.edu

     Envelope-to: f023@cpca11.uea.ac.uk
     X-ITHouse-Forward-Path: <k.briffa@uea.ac.uk>
     From: Ricardo Villalba <ricardo@lab.cricyt.edu.ar>
     To: Keith Briffa <k.briffa@uea.ac.uk>
     Subject: Re: your help
     Date: Sat, 13 Mar 1999 12:50:05 -0300
     X-Mailer: Microsoft Outlook Express 4.72.3110.5
     Dear Keith,
         Attached to this e mail there are two files: norpat.doc (Word97), which
     is a plot of the new Temperature reconstructions from Northern Patagonia,
     and norpat.new (ASCII), which contains the raw reconstruction data as well
     as smoothed versions with 50-, 25- and 10-year splines.  In the plot that I
     am sending you I chose the 25-year spline.   This reconstructions was based
     on 17 chronologies and is limited to the past 1000 years.  Although we have
     some records that cover the past 2000 years, we feel safer extending the
     reconstruction just for the past 1000 years.  We used PCREG program (which I
     got from Ed) for developing the reconstructions.  Tree-rings and a summer
     (December to February) regional temperature record (including Bariloche,
     Esquel and Collunco stations) were calibrated over the period 1903-1986 (84
     years).  The cumulative RSQ is 0.47 and the adjusted RSQ  0.42.  This
     represent an improvement over the past reconstructions, which have lower RSQ
     and some outliers (2 for Alerce and 3 for Lenca) removed.  We are trying to
     improve the replication of some of the chronologies to develop the final
     temperature reconstruction. However, I do not expect major changes in the
     final output in relation to the data attached to this e-mail.
         I will fax you a figure, which shows the temperature reconstruction in
     the context of glacier variations along Patagonia.  There is a remarkable
     agreement between the cool 1500-1660 interval in the reconstruction and
     glacier advances across Patagonia.
         My best to Phil.  Cheers, Ricardo

   --
   Professor Keith Briffa,
   Climatic Research Unit
   University of East Anglia
   Norwich, NR4 7TJ, U.K.

   Phone: +44-1603-593909
   Fax: +44-1603-507784
   [1]http://www.cru.uea.ac.uk/cru/people/briffa[2]/

