Figure 18. A. ¹³C of the modern equatorial Indian, western Pacific, and western Atlantic oceans (after Kroopnick, 1985; modified by Woodruff and Savin, 1989). B. Detailed ¹³C of the modern western Atlantic showing that the Antarctic Intermediate Water entering the Caribbean basins has low ¹³C values relative to the high ¹³C values of the upper North Atlantic Deep Water.