FIGURE O-2 Regional distribution of tree ring, borehole, ice core, and “other” records used to create the large-scale surface temperature reconstructions in Figure S-1 (and Figure O-5) for (top) A.D. 1000 and (bottom) A.D. 1500. “Other records” include marine and lake sediment cores, cave carbonates, and documentary records. The indicated distribution is approximate; for example, several deep-sea sediment cores are not indicated geographically. SOURCE: Data from Huang et al. (2000), Mann and Jones (2003a), Esper et al. (2002a), and Moberg et al. (2005a).