over the Last Glacial Termination

M. A. Cane, A. C. Clement, in Mechanisms of Millennial Scale Climate Change, P. U. Clark, R. S. Webb, L. D. Keigwin, Eds. (AGU Monograph, AGU, Washington, DC, 1999), vol. 112, pp. 373--383. 35. A. Schmittner, C. Appenzeller, T. F. Stocker, Geophys. Res. Lett. 27, 1163 (2000). 36. G. Bond et al., Science 278, 1257 (1997). 37. C. Wunsch, Paleoceanography 15, 417 (2000). 38. J. Jouzel et al., Nature 329, 403 (1987). 39. G. de Q. Robin, in The Climatic Record in Polar Ice Sheets, G. d. Q. Robin, Ed. (Cambridge Univ. Press, London, 1983), pp. 180 --184. 40. A. N. Salamatin et al., J. Geophys. Res. 103, 8963 (1998). 41. G. Krinner, C. Genthon, J. Jouzel, Geophys. Res. Lett. 24, 2825 (1997). 42. In Switzerland, work on GRIP and Byrd was supported by the University of Bern and the Swiss National Science Foundation. We thank C. C. Langway for providing Bern with additional Byrd samples. U.S work on Byrd and GISP2 was funded by grants OPP9714687 and OPP-9725918 to E.J.B. from th