Supplementary information and data for Mann et al., 2008. "Proxy-Based Reconstructions of Hemispheric and Global Surface Temperature Variations over the Past Two Millennia", PNAS. This site contains the following information: this directory: Supplementary Figures and Information (PDF): A PDF file containing all the supplementary figures and tables and additional information. 1209proxynames.xls: Microsoft Excel file containing a list of all the 1209 proxies used and information pertaining to each proxy. The last column in the file corresponds to the proxy data file name in the "data/proxy" directory. **UPDATED: 25 September 2008 to correct errors with the lat/lon values**. **UPDATED: 16 July 2009 to include metadata that were incorrect or erroneously excluded in the previous version of this file.** eiv-validation.xls contains the validation scores for the EIV method. cps-validation.xls conaints the validation scores for the CPS method. code directory: This directory contains all the codes used in generating the reconstructions, calculating cross-validation skills, and calculating the Monte Carlo significance levels. See "readme.txt" in the "code" directory for file details. ***UPDATED 29 November 2008 to add clihybrid.m to the codeprepdata directory. data directory: This directory contains the data (instrumental data and proxy network) used to produce the reconstructions. The scripts in the code directory can call those data to make reconstructions. The directory also contains all the results of reconstructions.***UPDATED 25 September 2008 to correct a minor error with the lat/lon in rodrigo_1999_andaluciarainannual.ppd*** corrections directory: This directory contains information about an error made in the location of one proxy, and the impact of this error on the results. ***UPDATED 3 October 2008 ***