A Paleolatitude Calculator for Paleoclimate Studies
Latitudinal sea surface temperature (SST) gradients for the early- (orange) and middle (blue) Eocene (modified from Bijl and colleagues ).
See text for full derivation of data. TEX86-derived SSTs (squares) were recalibrated to TEX86-H following Kim and colleagues . (A) with paleolatitudes as published by Bijl and colleagues  and references therein, (B) with paleolatitudes and error bars using the paleolatitude calculator provided with this paper (www.paleolatitude.org), in the default reference frame of Torsvik et al. . (C) comparison of paleolatitudes of the same paleotemperature data using paleomagnetic reference frames of Torsvik et al. , Besse and Courtillot  and Kent and Irving . For data, see Table 2, for present-day locations see Fig 2, for reconstructed locations at 50 Ma see Fig 4.