Figure F3. A. Oxygen isotope record of Greenland ice core GISP2 (Grootes and Stuiver, 1997) plotted against age. Numbers (1–23) indicate interstadials (IS). B. Site 1144 planktonic ¹⁸O record for the uppermost 108 mcd plotted against age. Thin lines define boundaries between marine isotope Stages (MIS) 1–5. Numbers (1–23) correlate planktonic ¹⁸O minima to IS in the GISP2 ¹⁸O record (A). "20K"IS marks ¹⁸O minimum that parallels a GISP2 warming near 20 ka. H1 through H6 identify high-salinity events coeval with North Atlantic Heinrich events. YD = Younger Dryas. Asterisks = position of ¹⁴C-datings after conversion into calendar ages (see Table T1). Massive arrow points toward a reduction in sea-surface salinity (SSS), interpreted as result of monsoon floods (1 = ~2‰ SSS).