date: Fri, 11 May 2007 19:21:20 UT from: grlonline@agu.org subject: 2007GL030571 (Editor - James Famiglietti): Request to Review from to: p.jones@uea.ac.uk Content-Transfer-Encoding: binary Content-Type: multipart/alternative; boundary="_----------=_11789112805933" MIME-Version: 1.0 X-Mailer: MIME::Lite 3.01 (F2.74; B3.07; Q3.07) Date: Fri, 11 May 2007 19:21:20 UT Message-Id: <117891128030@gems> *PLEASE ACCEPT OR DECLINE USING THE LINK PROVIDED BELOW* Dear Dr. Jones: Would you be willing and available to review "Adjustment for proxy number and coherence in a large-scale temperature reconstruction" by David Frank, Jan Esper, and Edward Cook, submitted for possible publication in the Geophysical Research Letters. This is a resubmission of a rejected manuscript which you previously reviewed. The manuscript's abstract is: Proxy records may display fluctuations in local climate variability that are artifacts of changing replication and interseries correlation of constituent time-series and also from methodological considerations. These biases obscure the understanding of past climatic variability, including estimation of extremes, differentiation between natural and anthropogenic forcing, and climate model validation. Herein, we evaluate as a case-study, the Esper et al. [2002] extra-tropical millennial-length temperature reconstruction that shows increasing variability back in time. We provide adjustments considering biases at both the site and hemispheric scales. The variance adjusted record shows greatest differences before 1200 when sample replication is quite low. A moderated amplitude of peak warmth during Medieval Times by about 0.4 {degree sign}C (0.2 {degree sign}C) at annual (40-year) timescales slightly re-draws the longer-term evolution of past temperatures Many other regional and large-scale reconstructions appear to contain variance-related biases. If you agree to review this manuscript, I would ask for your comments within 14 days from your acceptance. To ACCEPT, click on the link below: [1]http://grl-submit.agu.org/cgi-bin/main.plex?el=A4K5DCpP3A6BFkh2D2A9rOoUAZyBni6y3aQd0gEJi AZ If you are unable to review this manuscript at this time, I would appreciate any suggestions of other potential reviewers who would be qualified to examine this manuscript. (Via reply e-mail.) To DECLINE, click on the link below: [2]http://grl-submit.agu.org/cgi-bin/main.plex?el=A5K6DCpP3A4BFkh3E7A9rOoUAZyBni6y3aQd0gEJi AZ If you have any questions or need more information feel free to reply to this e-mail. Thank you for your consideration and support of Geophysical Research Letters. Sincerely, James Famiglietti Associate Editor Geophysical Research Letters