Auxiliary material for Paper 2004PA001021 Glacial Water Mass Geometry and the Distribution of d13C of SCO2 in the Western Atlantic Ocean W. B. Curry D. W. Oppo Department of Geology and Geophysics Woods Hole Oceanographic Institution Woods Hole, MA 02543 Curry, W. B. and D. W. Oppo, Glacial Water Mass Geometry and the Distribution of d13C of SCO2 in the Western Atlantic Ocean, Paleoceanography, doi 10.1029/2004PA001021, 2005. Introduction The auxillary material includes new Cibicidoides spp. stable isotopic data used to create the tables and figures in Curry and Oppo (2005) and a supplementary figure comparing modern, Holocene and glacial d13C sections in the western Atlantic Ocean. The new measurements come from a series of cores collected along the Brazil margin during cruise RV Knorr 159-5. All data were analyzed at Woods Hole Oceanographic Institution using Finnigan MAT 252 and 253 mass spectrometers following the procedures outlined in Ostermann and Curry (2000). All results are presented with respect to VPDB. 1. 2004PA001021-full.data.txt This file contains the Cibicidoides spp. isotopic data for the KNR159 cores completed by the date of publication of Curry and Oppo (2005). Individual cores are labeled. We have identified and labeled the stratigraphic levels used to determine glacial and Holocene isotopic values for Table 1 in the paper. 1.1 Column, depth, centimeters, stratigraphic depth level in the core. 1.2 Column, d13C, permil VPDB, carbon isotopic composition of Cibicidoides spp. 1.3 Column, d18O, permil VPDB, oxygen isotopic composition of Cibicidoides spp. Holocene, label identifying the level in the cores used to determine the Holocene values in Table 1 of Curry and Oppo (2005). Glacial, label identifying the level in the cores used to determine the glacial values in Table 1 of Curry and Oppo (2005). Supplemental Data Caption: This table contains the new isotopic data for the KNR159 cores completed by the date of publication of Curry and Oppo (2005). We have labeled the stratigraphic levels used to determine glacial and Holocene isotopic values for Table 1 in the paper. The three columns are: 1) depth (cm), 2) carbon isotopic composition (d13C, VPDB), and 3) oxygen isotopic composition (d18O, VPDB). All isotopic measurements were performed on Cibicidoides and Planulina taxa. No corrections have been made for presumed vital effect offsets. 2. 2004PA00102-supplemental_figure.eps This supplemental figure includes three sections from the western Atlantic Ocean: 1) a section based on the modern d13C values measured in the water column (Kroopnick, 1985); 2) a section based on the Holocene Cibicidoides spp. d13C values presented in Tables 1 and 2 of Curry and Oppo (2005); and 3) a section based on the glacial Cibicidoides spp. d13C values presented in Tables 1 and 2 of Curry and Oppo (2005). The top and bottom sections are the same as in Figure 4 of the paper. Supplementary Figure Caption: Three sections of d13C in the western Atlantic Ocean: 1) a section based on the modern d13C values measured in the water column (Kroopnick, 1985); 2) a section based on the Holocene Cibicidoides spp. d13C values presented in Tables 1 and 2 of Curry and Oppo (2005); and glacial section of d13C using the glacial Cibicidoides spp. d13C values presented in Tables 1 and 2 of Curry and Oppo (2005). The contour intervals and color palettes are the same in each figure. The glacial section has a much larger range of d13C values because of changes in the end member d13C values of the northern and southern water masses: the northern source became enriched in 13C and the southern source became depleted. Mixing between these water masses created the meridional and bathymetric gradients observed in the glacial section. A glacial intermediate water mass is present in the South Atlantic but its northern boundary cannot be determined because of poor core coverage at intermediate water depths between 25 S and 13 N. The same is true for the Holocene section: modern Antarctic Intermediate Water/Upper Circumpolar Deep Water is observed as a d13C minimum at the Brazil margin but its northern boundary is not sampled using the current geographic and bathymetric distribution of cores. References Ostermann, D. R. and W. B. Curry, Calibration of stable isotope data: An enriched d18O standard used for source gas mixing detection and correction, Paleoceanography 15, 353-360, 2000. Kroopnick, P. M., The distribution of d13C of SCO2 in the world oceans, Deep Sea Research, Part A, 32, 57-84, 1985.