Iberian Margin sea surface temperature during MIS 15 to 9 (580-300 ka): Glacial suborbital variability versus interglacial stability

Paleoceanography

Volumn 26, Issue 1, 2011, Pages

  Rodrigues, T ^a,b   Voelker, A H L ^a,b   Grimalt, J O ^c   Abrantes, F ^a   Naughton, F ^a,b  

^a LABORATÓRIO NACIONAL DE ENERGIA E GEOLOGIA   (Portugal)

^b UNIVERSITY OF PORTO   (Portugal)

^c INSTITUTE OF ENVIRONMENTAL ASSESSMENT AND WATER RESEARCH   (Spain)

Author keywords

[No Author keywords available]

Indexed keywords

ALKENONE; BIOMARKER; CONCENTRATION (COMPOSITION); COOLING; DEEP SEA; ESTIMATION METHOD; FREQUENCY ANALYSIS; GLACIAL-INTERGLACIAL CYCLE; HEINRICH EVENT; ISOTOPE; LAST GLACIATION; PALEOCEANOGRAPHY; PALEOCLIMATE; PALEOENVIRONMENT; PHYTOPLANKTON; SEA SURFACE TEMPERATURE;

ATLANTIC OCEAN; IBERIAN MARGIN;

EID: 79951590032     PISSN: 08838305     EISSN: None     Source Type: Journal    
DOI: 10.1029/2010PA001927     Document Type: Article

References (78)

1. Ambar, I. (1994), Alguns aspectos da física do oceano, report, pp. 21-34, Fund. Calouste Gul-benkian, Lisbon. (Available at http://zircon. dcsa.fct.unl.pt/dspace/handle/123456789/196.)
2. Bard, E., F. Rostek, J.-L. Turon, and S. Gendreau (2000), Hydrological impact of Heinrich events in the subtropical northeast Atlantic, Sci (Pubitemid 30656042)
3. Baumann, K.-H., and T. Freitag (2004), Pleistocene fluctuations in the northern Benguela Current system as revealed by coccolith assemblages, Mar. Micropaleontol, 52(1-4), 195-215, doi: 10.1016/j.marmicro.2004.04.011. (Pubitemid 39081481)
4. Berger, A. L. (1978), Long-term variations of daily insolation and Quaternary climatic changes, J. Atmos. Sci., 35, 2362-2367, doi:10.1175/1520- 0469(1978)0352.0.CO;2.
5. Billups, K., C. Lindley, J. Fisler, and P. Martin (2006), Mid Pleistocene climate instability in the subtropical northwestern Atlantic, Global Planet. Change, 54(3-4), 251-262, doi:10.1016/j.gloplacha2006.06.025. (Pubitemid 44739258)
6. Bond, G., et al. (1992), Evidence for massive discharges of icebergs into the North Atlantic Ocean during the last glacial period, Nature, 360, 245-249, doi:10.1038/360245a0. (Pubitemid 23377092)
7. Bond, G. C, W. Showers, M. Elliot, M. Evans, R. Lotti, I. Hajdas, G. Bonani, and S. Johnson (1999), The North Atlantic's 1-2 kyr climate rhythm: Relation to Heinrich events, Dansgaard/Oeschger cycles and the Little Ice Age, in Mechanisms of Global Climate Change at Millennial Time Scales, Geophys. Monogr. Ser., vol. 112, edited by P. U. Clark, R. S. Webb, and L. D. Keigwin, pp. 35-58, AGU, Washington, D. C.
8. Bowen, D. Q. (2009), Sea level 400 000 years ago (MIS 11): Analogue for present and future sea-level, Clim. Past Discuss., 5, 1853-1882, doi:10.5194/cpd-5-1853-2009.
9. Broecker, W. S. (1994), Massive iceberg discharges as triggers for global climate change, Nature, 372, 421-424, doi:10.1038/372421a0. (Pubitemid 24365441)
10. Cacho, I., J. O. Grimalt, C. Pelejero, M. Canals, F. J. Sierro, J. A. Flores, and N. Shackleton (1999), Dansgaard-Oeschger and Heinrich event imprints in Alboran Sea paleotempera-tures, Paleoceanography, 14(6), 698-705, doi:10.1029/1999PA900044. (Pubitemid 30168134)
11. Cacho, I., J. O. Grimalt, M. Canals, L. Sbaffi, N. J. Shackleton, J. Schönfeld, and R. Zahn (2001), Variability of the western Mediterranean Sea surface temperature during the last 25,000 years and its connection with the Northern Hemisphere climatic changes, Paleo-ceanography, 16(1), 40-52, doi:10.1029/2000PA000502. (Pubitemid 32296470)
12. Chapman, M. R., N. J. Shackleton, and J.-C. Duplessy (2000), Sea surface temperature variability during the last glacial-interglacial cycle: Assessing the magnitude and pattern of climate change in the North Atlantic, Palaeo-geogr. Palaeoclimatol. Palaeoecol., 157(1-2), 1-25, doi:10.1016/S0031-0182(99)00168-6. (Pubitemid 30149432)
13. Chen, M.-T., Y.-P. Chang, C.-C. Chang, L.-W. Wang, C.-H. Wang, and E.-F. Yu (2002), Late Quaternary sea-surface temperature variations in the southeast Atlantic: A planktic foraminifer faunal record of the past 600 000 yr (IMAGES II MD962085), Mar. Geol., 180(1-4), 163-181, doi:10.1016/S0025-3227(01)00212-2. (Pubitemid 34248729)
14. Cortijo, E., L. Labeyrie, L. Vidal, M. Vautravers, M. Chapman, J. C. Duplessy, M. Elliot, M. Arnold, J. L. Turon, and G. Auffret (1997), Changes in sea surface hydrology associated with Heinrich event 4 in the North Atlantic Ocean between 40°N and 60°N, Earth Planet. Sci. Lett., 146(1-2), 29-45, doi:10.1016/S0012-821X(96)00217-8.
15. de Abreu, L., N. J. Shackleton, J. Schonfeld, M. Hall, and M. Chapman (2003), Millennial-scale oceanic climate variability off the western Iberian Margin during the last two glacial periods, Mar. Geol., 196(1-2), 1-20, doi:10.1016/S0025-3227(03)00046-X. (Pubitemid 36400272)
16. de Abreu, L., F. F. Abrantes, N. J. Shackleton, P. C. Tzedakis, J. F. McManus, D. W. Oppo, and M. A. Hall (2005), Ocean climate variability in the eastern North Atlantic during intergla-cial marine isotope stage 11: A partial analogue to the Holocene?, Paleoceanography, 20, PA3009, doi:10.1029/ 2004PA001091. (Pubitemid 41601614)
17. Desprat, S., M. F. Sánchez Goñi, J. L. Turon, J. F. McManus, M. F. Loutre, J. Duprat, B. Malaizé, O. Peyron, and J.-P. Peypouquet (2005), Is vegetation responsible for glacial inception during periods of muted insolation changes?, Quat. Sci. Rev., 24(12-13), 1361-1374, doi:10.1016/j. quascirev.2005.01.005. (Pubitemid 40717338)
18. Desprat, S., M. F. Sánchez Goñi, F. Naughton, J.-L. Turon, J. Duprat, B. Malaizé, E. Cortijo, and J.-P. Peypouquet (2007), Climate variability of the last five isotopic interglacials: Direct land-sea-ice correlation from the multiproxy analysis of north-western Iberian Margin deep-sea cores, in The Climate of Past Intergla-cials, edited by F. Sirocko et al., pp. 375-386, Elsevier, Amsterdam.
19. de Vernal, A., and C. Hillaire-Marcel (2008), Natural variability of Greenland climate, vegetation, and ice volume during the past million years, Science, 320(5883), 1622-1625, doi:10.1126/science.1153929. (Pubitemid 351931249)
20. Droxler, A. W., and J. W. Farrell (2000), Marine isotope stage 11 (MIS 11): New insights for a warm future, Global Planet. Change, 24(1), 1-5, doi:10.1016/S0921-8181(99)00065-X. (Pubitemid 30147114)
21. Eglinton, G., S. Bradshaw, A. Resell, M. Sarnthein, U. Pflaumann, and R. Tiedemann (1992), Molecular record of secular sea surface temperature changes on 100-year timescales for glacial terminations I, II and IV, Nature, 356, 423-426, doi:10.1038/356423a0.
22. EPICA Community Members (2004), Eight glacial cycles from an Antarctic ice core, Nature, 429, 623-628, doi:10.1038/nature02599. (Pubitemid 38812307)
23. Eynaud, F., et al. (2009), Position of the Polar Front along the western Iberian Margin during key cold episodes of the last 45 ka, Geochem. Geophys. Geosyst., 10, Q07U05, doi:10.1029/2009GC002398.
24. Fiúza, A. F. G. (1983), Upwelling patterns off Portugal, in Coastal Upwelling, Its Sediment Record, edited by E. Suess and J. Thiede, pp. 85-98, Plenum, New York.
25. Fiúza, A. F. G., M. E. Macedo, and M. R. Guerreiro (1982), Climatological space and time variation of the Portuguese coastal upwelling, Oceanol. Acta, 5(1), 31-40.
26. Flores, J. A., M. Marino, F. J. Sierro, D. A. Hodell, and C. D. Charles (2003), Calcareous plankton dissolution pattern and coccolithophore assemblages during the last 600 kyr at ODP Site 1089 (Cape Basin, South Atlantic): Paleoceano-graphic implications, Palaeogeogr. Palaeocli-matol. Palaeoecol., 196(3-4), 409-426, doi:10.1016/S0031-0182(03)00467-X. (Pubitemid 37024030)
27. Flower, B. P., D. W. Oppo, J. F. McManus, K. A. Venz, D. A. Hodell, and J. L. Cullen (2000), North Atlantic intermediate to deep water circulation and chemical stratification during the past 1 Myr, Paleoceanography, 15(4), 388-403, doi:10.1029/1999PA000430. (Pubitemid 32300484)
28. Grimalt, J. O., E. Calvo, and C. Pelejero (2001), Sea surface paleotemperature errors in U37 estimation due to alkenone measurements near the limit of detection, Paleoceanography, 16(2), 226-232, doi:10.1029/1999PA000440. (Pubitemid 32554837)
29. Guo, Z. T., A. Berger, Q. Z. Yin, and L. Qin (2009), Strong asymmetry of hemispheric climates during MIS-13 inferred from correlating China loess and Antarctica ice records, Clim. Past, 5, 21-31, doi:10.5194/cp-5-21-2009.
30. Helmke, J. P., H. A. Bauch, U. Röhl, and E. S. Kandiano (2008), Uniform climate development between the subtropical and subpolar northeast Atlantic across marine isotope stage 11, Clim. Past, 4, 181-190, doi:10.5194/cp-4-181-2008.
31. Hemming, S. R. (2004), Heinrich events: Massive late Pleistocene detritus layers of the North Atlantic and their global climate imprint, Rev. Geophys., 42, RG1005, doi:10.1029/2003RG000128.
32. Hodell, D. A., K. A. Venz, C. D. Charles, and U. S. Ninnemann (2003), Pleistocene vertical carbon isotope and carbonate gradients in the South Atlantic sector of the Southern Ocean, Geochem. Geophys. Geosyst., 4(1), 1004, doi:10.1029/2002GC000367.
33. Hodell, D. A., J. E. T. Channell, J. H. Curtis, O. E. Romero, and U. Röhl (2008), Onset of "Hudson Strait" Heinrich events in the eastern North Atlantic at the end of the middle Pleistocene transition (~640 ka)?, Paleoceanography, 23, PA4218, doi:10.1029/2008PA001591.
34. Imbrie, J., et al. (1993), On the structure and origin of major glaciation cycles: 2. The 100,000-year cycle, Paleoceanography, 8(6), 699-735, doi: 10.1029/93PA02751.
35. Jouzel, J., et al. (2007), Orbital and millennial Antarctic climate variability over the past 800,000 years, Science, 317(5839), 793-796, doi:10.1126/science.1141038. (Pubitemid 47263433)
36. Lebreiro, S. M., J. C. Moreno, I. N. McCave, and P. P. E. Weaver (1996), Evidence for Heinrich layers off Portugal (Tore Seamount: 39°N, 12°W), Mar. Geol., 131(1-2), 47-56, doi:10.1016/0025-3227(95)00142-5.
37. Lisiecki, L. E., and M. E. Raymo (2005), A Pliocene-Pleistocene stack of 57 globally dis-tributed benthic d 1 O records, Paleoceanography, 20, PA1003, doi:10.1029/2004PA001071. (Pubitemid 40865277)
38. López-Martínez, C, J. O. Grimalt, B. Hoogakker, J. Gruetzner, M. J. Vautravers, and I. N. McCave (2006), Abrupt wind regime changes in the North Atlantic Ocean during the past 30,000-60,000 years, Paleoceanography, 21, PA4215, doi:10.1029/2006PA001275. (Pubitemid 47272041)
39. Loulergue, L., A. Schilt, R. Spahni, V. Masson-Delmotte, T. Blunier, B. Lemieux, J.-M. Barnola, D. Raynaud, T. F. Stocker, and J. Chappellaz (2008), Orbital and millennial-scale features of atmospheric CH4 over the past 800,000 years, Nature, 453,383-386, doi:10.1038/nature06950. (Pubitemid 351693132)
40. Loutre, M. F. (2003), Clues from MIS 11 to predict the future climate - A modelling point of view, Earth Planet. Sci. Lett., 212(1-2), 213-224, doi:10.1016/S0012-821X(03)00235-8. (Pubitemid 36881899)
41. Loutre, M. F., and A. Berger (2003), Marine isotope stage 11 as an analogue for the present inter-glacial, Global Planet. Change, 36(3), 209-217, doi: 10.1016/S0921-8181(02)00186-8. (Pubitemid 36409050)
42. Lüthi, D., et al. (2008), High-resolution carbon dioxide concentration record 650,000-800,000 years before present, Nature, 453, 379-382, doi:10.1038/nature06949. (Pubitemid 351693131)
43. Martrat, B., J. O. Grimalt, C. Lopez-Martinez, 1. Cacho, F. J. Sierro, J. A. Flores, R. Zahn, M. Canals, J. H. Curtis, and D. A. Hodell (2004), Abrupt temperature changes in the west ern Mediterranean over the past 250,000 years, Science, 306(5702), 1762-1765, doi:10.1126/science. 1101706. (Pubitemid 39601390)
44. Martrat, B., J. O. Grimalt, N. J. Shackleton, L. de Abreu, M. A. Hutterli, and T. F. Stocker (2007), Four climate cycles of recurring deep and surface water destabilizations on the Iberian Margin, Science, 317(5837), 502-507, doi:10.1126/science.1139994. (Pubitemid 47201823)
45. Maslin, M. A., X. S. Li, M.-F. Loutre, and A. Berger (1998), The contribution of orbital forcing to the progressive intensification of Northern Hemisphere glaciation, Quat. Sci. Rev., 17(4-5), 411-426, doi:10.1016/S0277- 3791(97)00047-4. (Pubitemid 28338600)
46. Masson-Delmotte, V., et al. (2006), Past temperature reconstructions from deep ice cores: Relevance for future climate change, Clim. Past, 2, 145-165, doi:10.5194/cp-2-145-2006. (Pubitemid 44655688)
47. Clymont, E. L., A. Rosell-Melé, J. Giraudeau, C. Pierre, and J. M. Lloyd (2005), Alkenone and coccolith records of the mid-Pleistocene in the south-east Atlantic: Implications for the U37 index and South African climate, Quat. Sci. Rev., 24(14-15), 1559-1572, doi:10.1016/j.quascirev.2004.06.024. (Pubitemid 41057918)
48. McManus, J. F., D. W. Oppo, and J. L. Cullen (1999), A 0.5-million-year record of millennial-scale climate variability in the North Atlantic, Science, 283(5404), 971-975, doi:10.1126/science. 283.5404.971.
49. McManus, J., D. Oppo, J. Cullen, and S. Healey (2003), Marine isotope stage 11 (MIS 11): Analog for Holocene and future climate?, in Earth's Climate and Orbital Eccentricity: The Marine Isotope Stage 11 Question, Geophys. Monogr. Ser., vol. 137, edited by A. W. Droxler, R. Z. Poore, and L. H. Burckle, pp. 69-85, AGU, Washington, D. C.
50. Mix, A. C, N. G. Pisias, W. Rugh, J. Wilson, A. Morey, and T. K. Hagelberg (1995), Benthic foraminifer stable isotope record from Site 849 (0-5 Ma): Local and global climate changes, Proc. Ocean Drill. Program Sci. Results, 138, 371-412, doi:10.2973/odp.proc.sr. 138.120.1995.
51. Müller, P. J., G. Kirst, G. Ruhland, I. von Storch, and A. Rosell-Melé (1998), Calibration of the alkenone paleotemperature index U37 based on core-tops from the eastern South Atlantic and the global ocean (60°N-60°S), Geochim. Cosmochim. Acta, 62(10), 1757-1772, doi:10.1016/S0016-7037(98)00097-0. (Pubitemid 29040050)
52. Naughton, F., et al. (2009), Wet to dry climatic trend in north-western Iberia within Heinrich events, Earth Planet. Sci. Lett., 284(3-4), 329-342, doi:10.1016/j.epsl.2009.05.001.
53. Nave, S., L. Labeyrie, J. Gherardi, N. Caillon, E. Cortijo, C. Kissel, and F. Abrantes (2007), Primary productivity response to Heinrich events in the North Atlantic Ocean and Norwegian Sea, Paleoceanography, 22, PA3216, doi:10.1029/2006PA001335. (Pubitemid 350201896)
54. Oppo, D. W., J. F. McManus, and J. L. Cullen (1998), Abrupt climate events 500,000 to 340,000 years ago: Evidence from subpolar North Atlantic sediments, Science, 279(5355), 1335-1338, doi:10.1126/science.279.5355.1335. (Pubitemid 28119571)
55. Pailler, D., and E. Bard (2002), High frequency paleoceanographic changes during the past 140 000 yr recorded by the organic matter in sediments of the Iberian Margin, Palaeogeogr. Palaeoclimatol. Palaeoecol, 181(4), 431-452, doi:10.1016/S0031-0182(01)00444-8. (Pubitemid 34657582)
56. Peliz, Á., J. Dubert, A. M. P. Santos, P. B. Oliveira, and B. Le Cann (2005), Winter upper ocean circulation in the western Iberian Basin-Fronts, eddies and poleward flows: An overview, Deep Sea Res., Part I, 52(4), 621-646, doi:10.1016/j. dsr.2004.11.005.
57. Raffi, I., J. Backman, E. Fornaciari, H. Pälike, D. Rio, L. Lourens, and F. Hilgen (2006), A review of calcareous nannofossil astrobio-chronology encompassing the past 25 million years, Quat. Sci. Rev., 25(23-24), 3113-3137, doi:10.1016/j.quascirev.2006.07.007. (Pubitemid 46209384)
58. Rodrigues, T., J. O. Grimalt, F. Abrantes, F. Naughton, and J.-A. Flores (2010), The lastglacial-interglacial transition (LGIT) in the western mid-latitudes of the North Atlantic: Abrupt sea surface temperature change and sea level implications, Quat. Sci. Rev., 29(15-16), 1853-1862, doi:10.1016/j.quascirev.2010.04.004.
59. Rosell-Melé, A., M. Weinelt, M. Sarnthein, N. Koç, and E. Jansen (1998), Variability of the Arctic front during the last climatic cycle: Application of a novel molecular proxy, Terra Nova, 10(2), 86-89, doi:10.1046/j.1365-3121. 1998.00172.x. (Pubitemid 29105884)
60. Roucoux, K. H., P. C. Tzedakis, L. de Abreu, and N. J. Shackleton (2006), Climate and vegetation changes 180,000 to 345,000 years ago recorded in a deep-sea core off Portugal, Earth Planet. Sci. Lett., 249(3-4), 307-325, doi: 10.1016/j.epsl.2006.07.005. (Pubitemid 44478715)
61. Salgueiro, E., A. H. L. Voelker, L. de Abreu, F. Abrantes, H. Meggers, and G. Wefer (2010), Temperature and productivity changes off the western Iberian Margin during the last 150 ky, Quat. Sci. Rev., 29(5-6), 680-695, doi:10.1016/j.quascirev.2009.11.013.
62. Sánchez Goñi, M. F., I. Cacho, J.-L. Turon, J. Guiot, F. J. Sierro, J.-P. Peypouquet, J. O. Grimalt, and N. J. Shackleton (2002), Synchroneity between marine and terrestrial responses to millennial scale climatic variability during the last glacial period in the Mediterranean region, Clim. Dyn., 19(1), 95-105, doi:10.1007/s00382-001-0212-x. (Pubitemid 34527757)
63. Shackleton, N. J. (1967), Oxygen isotope analysis and Pleistocene temperature reassessed, Nature, 215, 15-17, doi:10.1038/215015a0.
64. Shackleton, N. J., A. Berger, and W. R. Peltier (1990), An alternative astronomical calibration of the lower Pleistocene time scale based on ODP Site 677, Trans. R. Soc. Edinburgh Earth Sci., 81, 251-261.
65. Shackleton, N. J., M. A. Hall, and E. Vincent (2000), Phase relationships between millennial- scale events 64,000-24,000 years ago, Paleo-ceanography, 15(6), 565-569, doi:10.1029/2000PA000513. (Pubitemid 32300463)
66. Siegenthaler, U., et al. (2005), Stable carbon cycle-climate relationship during the late Pleistocene, Science, 310(5752), 1313-1317, doi:10.1126/science.1120130. (Pubitemid 41698860)
67. Stein, R., J. Hefter, J. Grützner, A. Voelker, and B. D. A. Naafs (2009), Variability of surface water characteristics and Heinrich-like events in the Pleistocene midlatitude North Atlantic Ocean: Biomarker and XRD records from IODP SiteU1313 (MIS 16-9), Paleoceanogra-phy, 24, PA2203,doi:10.1029/ 2008PA001639.
68. Tzedakis, P. C. (2009), The MIS 11 - MIS 1 analogy, southern European vegetation, atmospheric methane and the "early anthropogenic hypothesis," Clim. Past Discuss., 5, 1337-1365, doi:10.5194/cpd-5-1337- 2009.
69. Tzedakis, P. C, J. F. McManus, H. Hooghiemstra, D. W. Oppo, and T. A. Wijmstra (2003), Comparison of changes in vegetation in northeast Greece with records of climate variability on orbital and suborbital frequencies over the last 450,000 years, Earth Planet. Sci. Lett., 212(1-2), 197-212, doi:10.1016/S0012-821X(03)00233-4. (Pubitemid 36887283)
70. Villanueva, J., J. O. Grimalt, E. Cortijo, L. Vidal, and L. Labeyrie (1997a), A biomarker approach to the organic matter deposited in the North Atlantic during the last climatic cycle, Geochim. Cosmochim. Acta, 61(21), 4633-4646, doi:10.1016/S0016-7037(97) 83123-7.
71. Villanueva, J., C. Pelejero, and J. O. Grimalt (1997b), Clean-up procedures for the unbiased estimation of C37 alkenone sea surface temperatures and terrigenous n-alkane inputs in paleocea-nography, J. Chromatogr. A, 757(1-2), 145-151, doi:10.1016/S0021-9673(96)00669-3. (Pubitemid 27046966)
72. Voelker, A. H. L., S. M. Lebreiro, J. Schonfeld, I. Cacho, H. Erlenkeuser, and F. Abrantes (2006), Mediterranean outflow strengthening during Northern Hemisphere coolings: A salt source for the glacial Atlantic?, Earth Planet. Sci. Lett., 245(1-2), 39-55, doi:10.1016/j. epsl.2006.03.014.
73. Voelker, A., P. Martin, S. M. Lebreiro, and F. Abrantes (2007), Millennial-scale deep/intermediate water changes at the mid-depth Portuguese Margin during marine isotope stage (MIS) 11 (Abstract 0983), Quat. Int., 167-168 (Suppl. 1), 436.
74. Voelker, A.H.L., T. Rodrigues, R. Stein, J.Hefter, K. Billups, D. Oppo, J. McManus, and J. O. Grimalt (2009), Variations in mid-latitude North Atlantic surface water properties during the mid-Brunhes: Does marine isotope stage 11 stand out?, Clim. Past Discuss., 5, 1553-1607, doi:10.5194/cpd-5-1553-2009.
75. Wright, A. K., and B. P. Flower (2002), Surface and deep ocean circulation in the subpolar North Atlantic during the mid-Pleistocene revolution, Paleoceanography, 17(4), 1068, doi:10.1029/2002PA000782.
76. Yin, Q. Z., and Z. T. Guo (2007), Strong summer monsoon during the cool MIS-13, Clim. Past Discuss., 3, 1119-1132, doi:10.5194/cpd-3-1119-2007. (Pubitemid 47581353)
77. Zachos, J., M. Pagani, L. Sloan, E. Thomas, and K. Billups (2001), Trends, rhythms, and aberrations inglobal climate 65 Matopresent, Science, 292(5517), 686-693, doi:10.1126/science. 1059412.
78. Zahn, R., J. Schönfeld, H.-R. Kudrass, M.-H. Park, H. Erlenkeuser, and P. Grootes (1997), Thermohaline instability in the North Atlantic during meltwater events: Stable isotope and ice-rafted detritus records from Core SO75-26KL, Portuguese Margin, Paleoceano-graphy, 12(5), 696-710, doi:10.1029/97PA00581.