Forcing of Atlantic equatorial and subpolar millennial cycles by precession

Science

Volumn 274, Issue 5294, 1996, Pages 1867-1870

  McIntyre, Andrew ^a   Molfino, Barbara ^a,b  

^a Lamont Doherty Earth Observatory of Columbia University   (United States)

^b Central Intelligence Agency   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

ALGA; ARTICLE; ATLANTIC OCEAN; CLIMATE; GEOGRAPHY; MARINE ENVIRONMENT; PRIORITY JOURNAL; SCIENCE;

CLIMATE CYCLE; FORCING; HEINRICH EVENT; HEINRICH EVENTS; PALAEOCLIMATE; PRECESSION;

ATLANTIC, (NORTH);

EID: 0030303362     PISSN: 00368075     EISSN: None     Source Type: Journal    
DOI: 10.1126/science.274.5294.1867     Document Type: Article

References (37)

1. H. Heinrich, Quat. Res. 29, 143 (1988).
2. P. Mayewski et al., Science 263, 1747 (1994).
3. A. T. Kotilainen and N. J. Shackleton, Nature 377, 323 (1995); E. C. Grimm, G. L. Jacobson Jr., W. A. Watts, B. C. S. Hansen, K. A. Maasch, Science 261, 198 (1993).
4. A. T. Kotilainen and N. J. Shackleton, Nature 377, 323 (1995); E. C. Grimm, G. L. Jacobson Jr., W. A. Watts, B. C. S. Hansen, K. A. Maasch, Science 261, 198 (1993).
5. B. Molfino and A. McIntyre, Science 249, 766 (1990).
6. A. McIntyre et al., Paleoceanography 4, 19 (1989); A. McIntyre et al., Program for the Fifth International Conference on Paleoceanography (Halifax, Nova Scotia, 1995), p. 54.
7. A. McIntyre et al., Paleoceanography 4, 19 (1989); A. McIntyre et al., Program for the Fifth International Conference on Paleoceanography (Halifax, Nova Scotia, 1995), p. 54.
8. D. J. Verardo and A. McIntyre, Paleoceanography 9, 63 (1994).
9. G. Reverdin, in Upwelling in the Ocean: Modern Processes and Ancient Records, C. P. Summerhayes et al., Eds. (Wiley, New York, 1995), pp. 125-148.
10. R. H. Weisberg and T. Y. Tang, J. Geophys. Res. 92, 3709 (1987).
11. G. A. Jones, Deep-Sea Res., in press.
12. 14C and 147 for calendric signals) for all three cores.
13. E. N. Lorenz, Meteorol. Monogr. 8, 1 (1968).
14. L. D. Keigwin and G. A. Jones, Paleoceanography 10, 973 (1995).
15. T. Fronval et al., Nature 374, 443 (1995).
16. S. C. Porter and A. Zhisheng, ibid. 375, 305 (1995).
17. M. Stuiver and P. J. Reimer, Radiocarbon 35, 215 (1993).
18. E. Bard et al., ibid., p. 191.
19. Test of symmetry of a random variable Y about a point c. If we assume that Y has a frequency function p, then symmetry about c is p(Y + c) = p(Y - c). P. J. Bickel and K. A. Doksum, Mathematical Statistics (Holden-Day, Oakland, CA, 1977).
20. Calendric chronology of cores RC2402 and RC2408 yields eight peak-to-peak intervals having a range of 8.1 to 9.0 ky, with a mean of 8.43 ky.
21. G. C. Bond and R. Lotti, Science 267, 1005 (1995).
22. D. A. Short et al., Quat. Res. 35, 157 (1991).
23. T. K. Hagelberg et al., Paleoceanography 9, 545 (1994).
24. 14C chronology ranges from ±30 to ±420 for dated samples, but for interpolated values we consider that these estimates could be larger as a result of variation in sedimentation rate. However, in RC2408, F. profunda maxima were either directly AMS-dated or have dates closely allied with them. Calendric conversion yields 2σ errors ranging from ±35 to ±450. We found that the extreme case for the oldest peak-to-peak interval for conversion (15), using a minus error for the younger peak and a plus error for the older peak, is 8.75 ky. The estimate of the oldest interval for conversion (76) is 9.3 ky.
25. A. Berger, Quat. Int. 2, 1 (1989); P. I. Pestiaux et al., Clim. Change 12, 9 (1988).
26. A. Berger, Quat. Int. 2, 1 (1989); P. I. Pestiaux et al., Clim. Change 12, 9 (1988).
27. A. Berger and M. F. Loutre, Sci. Rep. Inst. Astron. Geophys. 13, 1 (1988).
28. W. S. Broecker et al., Clim. Dyn. 6, 265 (1992).
29. H. Haflidason et al., Geology 23, 1059 (1995).
30. D. R. MacAyeal, Paleoceanography 8, 775 (1993).
31. P. Yiou et al., Geophys. Res. Lett. 22, 2175 (1995).
32. B. Fontaine and S. Bigot, Int. J. Climatol. 13, 271 (1993).
33. F. Gasse and E. vanCampo, Earth Planet. Sci. Lett. 126, 435 (1994). Evidence of increased drought in West Africa af ∼4 to 3 ka is presented.
34. 14C years) in Central America.
35. S. P. Harrison et al., Quat. Res. 45, 138 (1996); S. O. Dahl and A. Nesje, Holocene 3, 269 (1993). Increased precipitation is inferred from changes in vegetation and lake levels and glacial accretion on the continents adjacent to the subpolar North Atlantic after 5 ka.
36. S. P. Harrison et al., Quat. Res. 45, 138 (1996); S. O. Dahl and A. Nesje, Holocene 3, 269 (1993). Increased precipitation is inferred from changes in vegetation and lake levels and glacial accretion on the continents adjacent to the subpolar North Atlantic after 5 ka.
37. We thank M. Yarusinski for assistance. Supported by NSF [MG&G grant OCE93-13821 (95%)], and NSF OCE801015 AMS/National Ocean Sciences Accelerator Mass Spectrometry Facility. This is Lamont-Doherty Earth Observatory contribution 5579.