cc: Gavin Schmidt <gschmidt@giss.nasa.gov>, Keith Briffa <k.briffa@uea.ac.uk>, mann@virginia.edu
date: Fri, 19 Nov 2004 08:59:57 -0500
from: "Michael E. Mann" <mann@virginia.edu>
subject: Re: Vision Document Table of Contents
to: Andrew Weaver <weaver@uvic.ca>, eystein.jansen@geo.uib.no

   Dear Andrew and Eystein,
   Here are two paragraphs (for section 3) I was charged with drafting collaboratively w/
   Keith and Gavin.
   Mike
   Workshop comparing current approaches

   We propose a workshop aimed at addressing the current issues and questions that exist with
   regard to the similarities, differences, strengths, and weaknesses among current
   alternative methods that have been employed for reconstruction past climates from
   paleoclimate proxy data. We advocate a paleoclimate reconstruction methodology and data
   intercomparison project ('PRMDIP') in which various paleoclimate reconstruction methods
   will be applied to common datasets to elucidate the differences between differing methods.
   These methods should include techniques for reconstructing both spatial patterns and
   hemispheric/global means of key climate variables (e.g. surface temperatures). Target data
   sets should include actual proxy data sets that have been used in previous large-scale
   climate reconstructions (e.g. tree-ring records reflective primarily of summer temperatures
   over the Northern Hemisphere continents, and 'multiproxy' datasets consisting of
   tree-rings, corals, ice cores, and other natural archives reflective of a broader range of
   regions, seasons, and climate variables).  Target data sets should also include model
   simulation results, from which synthetic proxy ('pseudoproxy') records can be constructed
   from the model simulation, and used to test the skill of alternative reconstruction
   methodologies in reconstructing the actual model climate history. Participation among
   attendees in the "PRMDIP" project experiments would be expected beforehand, so that the
   workshop can focus on comparing the results of different approaches. It is likely that the
   results of this intercomparison would be published in one or more articles following the
   meeting. We propose to hold this workshop during spring/summer of 2006.

   Workshop about possible future approaches

   We propose a workshop aimed at discussing and proposing possible approaches for extending
   high-resolution paleoclimate reconstructions further back in time through the merging of
   lower resolution natural proxy archives of climate. The focus would be both on the
   development of methodologies for combining annual and well dated, lower resolution (decadal
   to multidecadal) proxy information, and the possible testing of these methodologies using
   synthetic model-derived proxy data networks.  The workshop would bring together individuals
   with expertise in the various specific proxy types, individuals with expertise in
   statistical climate reconstruction methods, and individuals from the climate modeling
   community. We propose to hold this workshop during Fall of 2006 or Spring 2007.
   At 06:37 PM 11/10/2004, you wrote:

     Dear CLIVAR/PAGES Intersection Panelists,
     It was thoroughly enjoyable meeting you all at our recent workshop in
     Victoria. We have now put together a draft table of contents with writing
     assignments (in bold). Section 2 requires individual paragraphs outlining
     the key scientific issues/questions discussed at the meeting. Section 3
     requires a paragraphs discussing the rational for the item as well as some
     details as to what will be done with it.
     If you wish a copy of the strawperson.ppt file we were working on, please
     email Zhongwei as he has a copy.
     As discussed at the meeting, we would like to get pieces back by the end of
     next week.
     Once again, many thanks for your thoughtful contributions at the workshop.
     Best wishes,
     Eystein and Andrew
     ============================================================================
     Mailing Address:                      |   Courier Address:
     ----------------------------------------------------------------------------
     Andrew Weaver                         |   Andrew Weaver
     School of Earth and Ocean Sciences    |   School of Earth and Ocean Sciences
     University of Victoria                |    at Gordon Head Complex, Room 296a
     PO Box 3055                           |   University of Victoria
     Victoria, BC, V8W 3P6                 |   3964 Gordon Head Road
     Canada                                |   Victoria, BC, V8N 3X3, Canada
     ----------------------------------------------------------------------------
     email: weaver@uvic.ca                 |   Tel: (250) 472-4001
     [1]http://climate.uvic.ca               |   Fax: (250) 472-4004
     ============================================================================

   ______________________________________________________________
                       Professor Michael E. Mann
              Department of Environmental Sciences, Clark Hall
                         University of Virginia
                        Charlottesville, VA 22903
   _______________________________________________________________________
   e-mail: mann@virginia.edu   Phone: (434) 924-7770   FAX: (434) 982-2137
            [2]http://www.evsc.virginia.edu/faculty/people/mann.shtml

