From the top down: oxygen isotope ratios in planktonic (near-surface) foraminifera from a North Atlantic sediment core; abundances of the cold-water foraminifera N. pachyderma in two North Atlantic cores; Heinrich ice-rafting events 1 to 6; oxygen isotope ratios in the GRIP ice core; asymmetric sawtooth-shaped cooling cycles and numbered interstadial warming events.
Source: Gerard Bond et al., "Correlations Between Climate Records from North Atlantic Sediments and Greenland Ice," Nature Vol. 365 (Sept. 9, 1993), p. 145.
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Last modified by pib on October 28, 2003.