New high‐resolution alkenone record of last glacial to holocene sea‐surface temperature change in the east‐equatorial south atlantic ocean

References

• Antonov, J., Levitus, S., Boyer, T.P., Conkright, M., O' brien, T. and Stephens, C., 1998: World Ocean Atlas 1998 Vol. 1: Temperature of the Atlantic Ocean, NOAA Atlas NESDIS 27. US Government Printing Office. Washington, DC. 166 p.
   Google Scholar
• Arz, H.W., Pätsold, J. and Wefer, G., 1999: The deglacial history of the western tropical Atlantic as inferred from high resolution stable isotope records off northeastern Brazil. Earth and Planetary Science Letters, 167: 105–117.
   Google Scholar
• Bard, E., 1988: Correction of accelerator mass spectrometry 14C ages measured in planktonic foraminifera: Paleoceanographic implications. Paleoceanography, 3(6): 635–645.
   Google Scholar
• Bard, E., 2001: Comparison of alkenone estimates with other paleotemperature proxies. Geochemistry, Geophysics, Geosystems, 2: Paper number 2000GC000050.
   Google Scholar
• Bard, E., Arnold, M., Fairbanks, R.G. and Hamelin, B., 1993: 230Th–234U and 14C ages obtained by mass spectrometry on corals. Radiocarbon, 35(1): 191–199.
   Web of Science ®Google Scholar
• Bard, E., Rostek, F. and Sonzogni, C., 1997: Interhemispheric synchrony of the last deglaciation inferred from alkenone palaeothermometry. Nature, 385: 707–710.
   Web of Science ®Google Scholar
• Barker, P.A., Street‐perron, F.A., Leng, M.J., Greenwood, P.B., Swain, D.L., Perrott, R.A., Telford, R.J. and Ficken, K.J., 2001: A 14,000‐year oxygen isotope record from diatom silica in two alpine lakes on Mt. Kenya. Science, 292: 2307–2310.
   PubMedGoogle Scholar
• Be, A.W.H. and Hamlin, W.H., 1967: Ecology of Recent plank‐tonic foraminifera: Part 3 ‐ Distribution in the North Atlantic during the summer of 1962. Micropaleontology, 13(1): 87–106.
   Google Scholar
• Be, A. W.H. and Tolderlund, D.S., 1971: Distribution and ecology of living planktonic foraminifera in surface waters of the Atlantic and Indian Oceans. In: Funnell, B.M. and Riedel, W.R., (eds): The Micropaleontology of Oceans. Cambridge University Press. Cambridge. 105–149.
   Google Scholar
• Berger, A., 1992: Orbital variations and insolation database. IGBP PAGES/World Data Center‐A for Paleoclimatology Data Contribution Series #92‐007. NOAA/NGDC Paleoclimatology Program. Boulder, CO.
   Google Scholar
• Beuning, K.R.M., Talbot, M.R. and Kelt, K., 1997: A revised 30,000‐year paleoclimatic and paleohydrological history of Lake Albert, East Africa. Palaeogeography, Palaeoclimatology, Palaeoecology, 136: 259–279.
   Web of Science ®Google Scholar
• Boyer, T.P., Levitus, S., Antonov, J., Conkright, M., O'brien, T. and Stephens C., 1998: World Ocean Atlas 1998 Vol. 4: Salinity of the Atlantic Ocean, NOAA Atlas NESDIS 30. US Government Printing Office. Washington, DC. 166 p.
   Google Scholar
• Brassell, S.C., Eglinton, G., Marlowe, I.T., Pflaumunn, U. and Sarnthein, M., 1986: Molecular stratigraphy: a new tool for climatic assessment. Nature, 320: 129–133.
   Web of Science ®Google Scholar
• CLIMAP, 1981: Seasonal reconstruction of the Earth's surface at the last glacial maximum. Geological Society of America Map and Chart Series, MC‐36: 1–18.
   Google Scholar
• Coplen, T.B., Kendall, C. and Hopple, J., 1983: Comparison of stable isotope reference samples. Nature, 302(5905):236–238.
   Web of Science ®Google Scholar
• Crowley, T.J., 1992: North Atlantic Deep Water cools the Southern Hemisphere. Paleoceanography, 7(4): 489–497.
   Google Scholar
• de Menaced, P.B., Ruddiman, W.F. and Pokras, EM., 1993: Influences of high‐and low‐latitude processes on African terrestrial climate: Pleistocene eolian records from equatorial Atlantic Ocean Drilling Program Site 663. Paleoceanography, 8(2): 209–242.
   Google Scholar
• de Menaced, P., Ortiz, J., Guilderson, T., Adkins, J., Sarnthein, M., Baker, L. and Yarusinsky, M., 2000: Abrupt onset and termination of the African Humid Period: rapid climate responses to gradual insolation forcing. Quaternary Science Reviews, 19: 347–361.
   Google Scholar
• Epstein, S., Buchsbaum, R., Lowenstam, H.A. and Urey, H.C., 1953: Revised carbonate‐water isotopic temperature scale. Geological Society of America Bulletin, 64: 1315–1326.
   Web of Science ®Google Scholar
• Fairbanks, R.G., 1989: A 17,000‐year glacio‐eustatic sea level record: influence of glacial melting rates on the Younger Dryas event and deep‐ocean circulation. Nature, 342: 637–642.
   Web of Science ®Google Scholar
• Fairbanks, R.G. and Wiebe, P.H., 1980: Foraminifera and chlorophyll maximum: Vertical distribution, seasonal succession, and paleoceanographic significance. Science, 209: 1524–1526.
   Web of Science ®Google Scholar
• Fairbanks, R.G., Wiebe, P.M. and Be, A. W.H., 1980: Vertical distribution and isotopic composition of living planktonic foraminifera in the western North Atlantic. Science, 207: 61–63.
   Google Scholar
• Fairbanks, R.G., Sverdlove, M., Free, R., Wiebe, P.H. and Be, A. W.H., 1982: Vertical distribution and isotopic fractionation of living planktonic foraminifera from the Panama Basin. Nature, 298(5877): 841–844.
   Google Scholar
• Farrera, I., Harrison, S.P., Prentice, I.C., Ramstein, G., Guiot, J., Bartlein, P.J., Bonnefille, R., Bush, M., von Grafenstein, U., Holmgren, K., Hooghiemstra, H., Hope, G., Jolly, D., Lauritzen, S.‐E., Ono, Y., Pinot, S., Stute, M. and Yu, G., 1999: Tropical climates at the Last Glacial Maximum: a new synthesis of terrestrial palaeoclimate data. I. Vegetation, lake‐levels and geochemistry. Climate Dynamics, 15: 823–856.
   Web of Science ®Google Scholar
• Faure, G., 1986: Principles of Isotope Geology. John Wiley & Sons Inc. New York. 589 p.
   Google Scholar
• Gasse, F., 2001: Hydrological changes in Africa. Science, 292: 2259–2260.
   Google Scholar
• Gasse, P., Ledee, V., Massault, M. and Fantes, J.C., 1989: Water level fluctuations of Lake Tanganyika in phase with oceanic changes during the last glaciation and deglaciation. Nature, 342: 57–59.
   Web of Science ®Google Scholar
• Gasse, P., Tehet R., Durand A., Gibert E. and Fontes J.‐C., 1990: The arid‐humid transition in the Sahara and the Sahel during the last deglaciation. Nature, 346: 141–146.
   Web of Science ®Google Scholar
• Grimalt, J.O., Rullkotter, J., Sicre, M.‐A., Summons, R., Farrington, J., Harvery, H. R., Goñi, M. and Sawada, K., 2000: Modifications of the C37 alkenone and alkenoate composition in the water column and sediment: Possible implications for sea surface temperature estimates in paleoceanography. Geochemistry, Geophysics, Geosystems, 1: Paper number 2000GC000053.
   Google Scholar
• Guilderson, T.P., Fairbanks, R.G. and Rubenstone, J.L., 1994: Tropical temperature variations since 20,000 years ago: Modulating interhemispheric climate change. Science, 263: 663–665.
   PubMed Web of Science ®Google Scholar
• Guilderson, T.P., Fairbanks, R.G. and Rubenstone, J.L., 2001: Tropical Atlantic coral oxygen isotopes: glacial–interglacial sea surface temperatures and climate change. Marine Geology, 172: 75–89.
   Google Scholar
• Guptha, M.V.S., Curry, W.B., Ittekkot, V. and Muralinath, A.S., 1997: Seasonal variation in the flux of planktic foraminifera: Sediment trap results from the Bay of Bengal, Northern Indian Ocean. Journal of Foraminiferal Research, 27(1): 5–19.
   Google Scholar
• Hastenrath, S., 1980: Heat budget of tropical ocean and atmosphere. Journal of Physical Oceanography, 10: 159–170.
   Web of Science ®Google Scholar
• Herbert, T.D., Schuffert, J.D., Thomas, D., Lange, C., Weinheimer, A., Peleo‐alampay, A. and Herguera, J.‐C., 1998: Depth and seasonality of alkenone production along the California margin inferred from a core top transect. Paleoceanography, 13(3): 263–271.
   Google Scholar
• Hughen, K.A., Overpeck, J.T., Peterson, L.C. and Trumbore, S., 1996: Rapid climate changes in the tropical Atlantic region during the last deglaciation. Nature, 380: 51–54.
   Google Scholar
• Imbrie, J., Mcintyre, A. and Mix, A., 1989: Oceanic response to orbital forcing in the late Quaternary: Observational and experimental strategies. In: Berger, A. et. al., (eds): Climate and Geo‐Sciences. Kluwer Academic Publishers. Dordrecht. 121–164.
   Google Scholar
• Jansen, J.H.F. and van Iperen, J.M., 1991: A 220,000‐year climatic record for the east equatorial Atlantic Ocean and equatorial Africa: Evidence from diatoms and opal phytoliths in the Zaire (Congo) deep‐sea fan. Paleoceanography, 6(5): 573–591.
   Google Scholar
• Jansen, J.H.F., van Weering, T.C.E., Gieles, R. and van Iperen, J., 1984: Middle and Late Quaternary oceanography and climatology of the Zaire‐Congo Fan and the adjacent eastern Angola Basin. Netherlands Journal of Sea Research, 201–249.
   Google Scholar
• Jansen, J.H.F., Ufkes, E. and Schneider, R.R., 1996: Late Quaternary movements of the Angola‐Benguela Front, SE Atlantic, and implications for advection in the equatorial ocean. In: Wefer, G., Berger, W.H., Siedler, G. and Webb, DJ., (eds): The South Atlantic: Present and Past Circulation. Springer‐Verlag. Berlin Heidelberg. 553–575.
   Google Scholar
• Johnson, T.C., Scholz, C.A., Talbot, M.R., Kelts, K., Ricketts, R. D., Ngobi, G., Beuning, K., Ssemmanda, I. and Mcgill, J.W., 1996: Late Pleistocene desiccation of Lake Victoria and rapid evolution of cichlid fishes. Science, 273: 1091–1093.
   PubMed Web of Science ®Google Scholar
• Karlen, W. and Rosqvist, G., 1988: Glacier fluctuations recorded in lacustrine sediments on Mount Kenya. National Geographic Research, 4(2): 219–232.
   Google Scholar
• Karlen, W., Fastook, J.L., Holmgren, K., Malmström, M., Matthews, J.A., Odada, E., Risberg, J., Rosqvist, G., Sandgren, P., Shemesh, A. and Westerberg, L.‐O., 1999: Glacier fluctuations on Mount Kenya since c. 6000 cal. years BP: implications for Holocene climatic change in Africa. Ambio, 28(5): 409–418.
   Web of Science ®Google Scholar
• Kim, J.‐H., Schneider, R.R., Muller, P.J. and Wefer G., 2002: Interhemispheric comparison of deglacial sea‐surface temperature patterns in Atlantic eastern boundary currents. Earth and Planetary Science Letters, 194: 383–393.
   Google Scholar
• Kirst, G.J., Schneider, R.R., Mailer, P.J., von Starch, I. and Wefer, G., 1999. Late Quaternary temperature variability in the Benguela Current system derived from alkenones. Quaternary Research, 52: 92–103.
   Web of Science ®Google Scholar
• Lagerklint, I.M., 2001: Marine multi‐proxy records of Late Quaternary climate change from the Atlantic Ocean. PhD thesis, Stockholm University, Stockholm, Sweden.
   Google Scholar
• Lagerklint, I.M. and Wright, J.D., 1999. Late glacial warming prior to Heinrich event 1: The influence of ice rafting and large ice sheets on the timing of initial warming. Geology, 27: 1099–1102.
   Google Scholar
• Lezine, A.‐M. and Vergnaud‐grazzini, C., 1993: Evidence of forest extension in west Africa since 22000 BP: A pollen record from the eastern tropical Atlantic. Quaternary Science Reviews, 12: 203–210.
   Web of Science ®Google Scholar
• Lin, H.‐L., Peterson, L.C., Overpeck, J.T., Trumbore, S.E. and Murray, D.W., 1997: Late Quaternary climate change from δ18O records of multiple species of planktonic foraminifera: High‐resolution records from the anoxic Cariaco Basin, Venezuela. Paleoceanography, 12(3): 415–427.
   Google Scholar
• Madureira, L.A.S., Conte, M.H. and Eglinton, G., 1995: Early diagenesis of lipid biomarker compounds in North Atlantic sediments. Paleoceanography, 10(3): 627–642.
   Google Scholar
• Maley, J., 1997. Middle to Late Holocene changes in tropical Africa and other continents: Paleomonsoon and sea surface temperature. In: Dalfes, H.N., Kukla, G. and Weiss, H., (eds): Third Millennium BC Climate Change and Old World Collapse. NATO ASI Series. Springer‐Verlag. Berlin Heidelberg. 611–640.
   Google Scholar
• Mcintyre, A., Ruddiman, W.F., Karlin, K. and Mix, A.C., 1989: Surface water response of the equatorial Atlantic Ocean to orbital forcing. Paleoceanography, 4(1): 19–55.
   Google Scholar
• Mix, A.C., Ruddiman, W.F., Mcintyre, A., 1986: Late Quaternary Paleoceanography of the tropical Atlantic, 1: Spatial variability of annual mean sea surface temperatures, 0–20,000 years BP Paleoceanography, 1: 43–66.
   Google Scholar
• Mix, A.C., Bard, E., and Schneider, R., 2001: Environmental processes of the ice age: land, oceans, glaciers (EPILOG). Quaternary Science Reviews, 20: 627–657.
   Web of Science ®Google Scholar
• Molfino, B. and Mcintyre, A., 1990: Processional forcing of nutricline dynamics in the equatorial Atlantic. Science, 249: 766–769.
   PubMed Web of Science ®Google Scholar
• Mollenhauer, G., Eglinton, T.I., Ohkouchi, N., Schneider, R.R., Muller, P.J., Grootes, P.M. and Rullkotter, J., 2003: Asynchronous alkenone and foraminifera records from the Benguela Upwelling System. Geochimica et Cosmochimica Acta, 67(12): 2157–2171.
   Google Scholar
• Mutter, P.J., Cepek, M., Ruhland, G. and Schneider, R.R., 1997: Alkenone and coccolithophorid species changes in late Quaternary sediments from the Walvis Ridge: Implications for the alkenone paleotemperature method. Palaeogeography, Palaeoclimatology, Palaeoecology, 135: 71–96.
   Google Scholar
• Muller, P.J., Kirst, G., Ruhland, G., von Starch, I. and Rosell‐mele, A., 1998. Calibration of the alkenone paleotemperature index Uk37 based on core‐tops from the eastern South Atlantic and the global ocean (60°N‐60°S). Geochimica et Cosmochimica Acta, 62(10): 1757–1772.
   Google Scholar
• Nicholson, S.E. and Flohn, H., 1980: African environmental and climatic changes and the general atmospheric circulation in late Pleistocene and Holocene. Climatic Change, 2(4): 313–348.
   Google Scholar
• Niebler, H.‐S., An, H.W., Donner, B., Mulitza, S., Patzold, J. and Wefer, G., 2003: Sea surface temperatures in the equatorial and South Atlantic Ocean during the Last Glacial Maximum (23–19 ka). Paleoceanography, 18(3): 1069.
   Google Scholar
• Nurnberg, D., Muller, A. and Schneider, R.R., 2000: Paleo‐sea surface temperature calculations in the equatorial east Atlantic from Mg/Ca ratios in planktic foraminifera: A comparison to sea surface temperature estimates from Uk37, oxygen isotopes, and foraminiferal transfer functions. Paleoceanography, 15(1): 124–134.
   Google Scholar
• Pastouret, L., Chamley, H., Delibrias, G., Duplessy, J.‐C. and Thiede, J., 1978: Late Quaternary climatic changes in western tropical Africa deduced from deep‐sea sedimentation off the Niger Delta. Oceanologica Acta, 1(2): 217–232.
   Google Scholar
• Peltier, W.R., 1994: Ice age paleotopography, Science, 265 (5169): 195–201.
   Web of Science ®Google Scholar
• Peterson, R.G. and Stramma, L., 1991: Upper‐level circulation in the South Atlantic Ocean. Progress in Oceanography, 26: 1–73.
   Web of Science ®Google Scholar
• Peyron, O., Jolly, D. and Guiot, J., 2000: Climate of East Africa 6000 14C Yr BP as inferred from pollen data. Quaternary Research, 54: 90–101.
   Web of Science ®Google Scholar
• Prahl, F.G. and Wakeham, S.G., 1987: Calibration of unsaturation patterns in long‐chain ketone compositions for palaeo‐temperature assessment. Nature, 330: 367–369.
   Google Scholar
• Prahl, F.G., Muehlhausen, L.A. and Zahnle, D.L., 1988: Further evaluation of long‐chain alkenones as indicators of paleoceanographic conditions. Geochimica et Cosmochimica Acta, 52: 2303–2310.
   Google Scholar
• Prahl, F.G., de Lange, G.J., Lyle, M. and Sparrow, M.A., 1989: Post‐depositional stability of long‐chain alkenones under contrasting redox conditions. Nature, 341: 434–437.
   Google Scholar
• Prell, W.L. and Kutzbach, J.E., 1987: Monsoon variability over the past 150,000 years. Journal of Geophysical Research, 92(D7): 8411–8425.
   Google Scholar
• Ravelo, A.C. and Fairbanks, R.G., 1992: Oxygen isotopic composition of multiple species of planktonic foraminifera: Recorders of the modern photic zone temperature gradient. Pale-oceanography, 7(6): 815–831.
   Google Scholar
• Rind, D. and Peteet, D., 1985: Terrestrial conditions at the Last Glacial Maximum and CLIMAP sea‐surface temperature estimates: Are they consistent Quaternary Research, 24: 1–22.
   Web of Science ®Google Scholar
• Roberts, N., Lamb, H.F., El hamauti, N. and Barker, P., 1994: Abrupt Holocene hydro‐climatic events: palaeolimnological evidence from North‐West Africa. In: Millington, A.C. and Pye, K., (eds): Environmental Change in Drylands; Biogeographical and Geomorphological Perspectives. John Wiley & Sons. Chichester. 163–175.
   Google Scholar
• Rosqvist, G., 1990: Quaternary glaciations in Africa. Quaternary Science Reviews, 9: 281–297.
   Web of Science ®Google Scholar
• Ruhlemann, C., Mulitza, S., Muller, P.J., Wefer, G. and Zahn, R., 1999: Warming of the tropical Atlantic Ocean and slowdown of thermohaline circulation during the last deglaciation. Nature, 402: 511–514.
   Web of Science ®Google Scholar
• Sarnthein, M., Erlenkeuser, H. and Zahn, R, 1982: Termination I: The response of continental climate in the subtropics as recorded in deep‐sea sediments. Bulletin, de l'Institut de Geologie du Bassin. d'Aquitaine, 31–32: 393–407.
   Google Scholar
• Schneider, R.R., Müller, P.J. and Ruhland, G., 1995: Late Quaternary surface circulation in the east equatorial South Atlantic: Evidence from alkenone sea surface temperatures. Pale-oceanography, 10(2): 197–219.
   Google Scholar
• Schneider, R.R., Müller, P.J., Ruhland, G., Meinecke, G., Schmidt, H. and Wefer, G., 1996: Late Quaternary surface temperatures and productivity in the east‐equatorial South Atlantic: Response to changes in trade/monsoon wind forcing and surface water advection. In: Wefer, G., Berger, W.H., Siedler, G. and Webb, DJ., (eds): The South Atlantic: Present and past cirkulation. Springer‐Verlag, Berlin Heidelberg, 527–551.
   Google Scholar
• Schrag, D.P., Hampt, G. and Murray, D. W., 1996: Pore fluid constraints on the temperature and oxygen isotopic composition of the glacial ocean. Science, 272: 1930–1932.
   PubMed Web of Science ®Google Scholar
• Shanahan, T.M. and Zreda, M., 2000: Chronology of Quaternary glaciations in East Africa, Earth and Planetary Science Letters, 177: 23–42.
   Google Scholar
• Shi, N., Dupont, L.M., Beug, H.‐J. and Schneider, R., 2000: Correlation between vegetation in southwestern Africa and oceanic upwelling in the past 21,000 years. Quaternary Research, 54: 72–80.
   Google Scholar
• Sikes, E.L. and Keigwin, L.D., 1994: Equatorial Atlantic sea surface temperature for the last 30 kyr: A comparison of Uk37, δ18O and foraminiferal assemblage temperature estimates. Paleoceanography, 9(1): 31–45.
   Google Scholar
• Sikes, E.L, Farrington, J.W. and Keigwin, L.D., 1991: Use of the alkenone unsaturation ration Uk37 to determine past sea surface temperatures: core‐top SST calibrations and methodology considerations. Earth and Planetary Science Letters, 104: 36–47.
   Google Scholar
• Sonzogni, C., Bard, E., Rostek, F. and Dollfus, D., 1997: Temperature and salinity effects on alkenone ratios measured in surface sediments from the Indian Ocean. Quaternary Research, 47: 344–355.
   Google Scholar
• Stager, J.C., Camming, B.F. and Meeker, L.D., 2003: A 10,000‐year high‐resolution diatoms record from Plikington Bay, Lake Victoria, East Africa. Quaternary Research, 59: 172–181.
   Google Scholar
• Steens, T. N., Ganssen, G. and Kroon, D., 1992: Oxygen and carbon isotopes in planktonic foraminifera as indicators of up‐welling intensity and upwelling‐induced high productivity in sediments from the northwestern Arabian Sea. In: Summerhayes, C.P., Prell, W.L. and Emeis, K.C., (eds): Upwelling Systems: Evolution since the Early Miocene. Geological Society Special Publication No. 64. The Geological Society London. Tulsa, Oklahoma. 107–119.
   Google Scholar
• Stramma, L. and Schott, P., 1999: The mean flow field of the tropical Atlantic Ocean. Deep-Sea Research II, 46: 279–303.
   Web of Science ®Google Scholar
• Street, F.A. and Grove A.T., 1979: Global maps of lake‐level fluctuations since 30,000 yr BP Quaternary Research, 12(1): 83–118.
   Google Scholar
• Street‐perrott, F.A. and Harrison, S.P., 1984: Temporal variations in lake levels since 30000 yr BP ‐ an index of the global hydrological cycle. In: Hansen, I.E. and Takahashi, T., (eds): Climate Processes and Climate Sensitivity. Geophysical Monograph 29: 118–129.
   Google Scholar
• Street‐perrott, F.A., Mitchell, J.F.B., Marchand, D.S. and Brunner J.S., 1990: Milankovitch and albedo forcing of the tropical monsoons; a comparison of geological evidence and numerical simulations for 9000 yr BP. Transactions of the Royal Society of Edinburgh, Earth Sciences, 81(4): 407–427.
   Google Scholar
• Stuiver, M. and Reimer, P.J., 1993: Extended 14C database and revised CALIB radiocarbon calibration program. Radiocarbon, 35: 215–230.
   Web of Science ®Google Scholar
• Stuiver, M., Reimer, P.J., Bard, E., Beck, J.W., Burr, G.S., Hughen, K.A., Kromer, B., Mccormuc, F.G., v.d.Plicht, J. and Spurk, M., 1998: INTCAL98 Radiocarbon age calibration 24000 ‐ 0 cal BP. Radiocarbon, 40: 1041–1083.
   Web of Science ®Google Scholar
• Stute, M., Forster, M., Frischkorn, H., Serejo, A., Clark, J. F., Schlosser, P., Broecker, W. S., and Bonani, G., 1995: Cooling of tropical Brazil (5°C) during the Last Glacial Maximum. Science, 269: 379–383.
   PubMed Web of Science ®Google Scholar
• Talbot, M.R. and Johannessen, T., 1992: A high resolution palaeoclimatic record for the last 27 500 years in tropical West Africa from the carbon and nitrogen isotopic composition of lacustrine organic matter. Earth and Planetary Science Letters, 110(1–4): 23–37.
   Google Scholar
• Taylor, DM., 1990: Late Quaternary pollen records from two Ugandan mires: evidence for environmental change in the Rukiga Highlands of southwest Uganda. Palaeogeography, Palaeoclimatology, Palaeoecology, 80: 283–300.
   Web of Science ®Google Scholar
• Thompson, L.G., Mosley‐thompson, E., Davis, M.E., Lin, P.‐N., Henderson, K.A., Cole‐dai, J., Bolzan, J.F. and Liu, K.‐b., 1995: Late glacial stage and Holocene tropical ice core records from Huascaran, Peru. Science, 269: 46–50.
   PubMed Web of Science ®Google Scholar
• Thompson, L.G., Mosley‐thompson, E., Davis, M.E., Henderson, K.A., Brecher, H.H., Zagorodnow, V.S., Mashiotta, T.A., Lin‐ P.N., Mikhalenko, V.N., Hardy, D.R. and Beer, J., 2002: Kilimanjaro ice core records: Evidence of Holocene climate change in tropical Africa. Science, 298: 589–593.
   PubMed Web of Science ®Google Scholar
• Ufkes, E., Jansen, J.H.F. and Brummer, G.‐J.A., 1998: Living planktonic foraminifera in the eastern South Atlantic during spring: indicators of water masses, upwelling and the Congo (Zaire) River plume. Marine Micropaleontology, 33: 27–53.
   Google Scholar
• van Bennekom, A.J. and Berger, G.W., 1984: Hydrography and silica budget of the Angola Basin. Netherlands Journal of Sea Research, 17(2–4): 149–200.
   Google Scholar
• Vincens, A., Schwartz, D., Bertau, J., Elenga, H. and Namur, C., 1998: Late Holocene climatic change in Western Equatorial Africa inferred from pollen from lake Sinnda, Southern Congo. Quaternary Research 50: 34–45.
   Web of Science ®Google Scholar
• Voituriez, B., 1981: Equatorial upwelling in the eastern Atlantic: Problems and paradoxes. In: Richards, F.A., (ed.): Coastal Up‐welling. American Geophysical Union, Washington, DC.
   Google Scholar
• Volkman, J.K., Eglinton, G., Comer, E.D.S. and Forsberg, T.E.V., 1980: Long‐chain alkenes and alkenones in the marine coccolithophorid Emiliania huxleyi. Phytochemistry, 19: 2619–2622.
   Google Scholar
• Volkman, J.K., Barrett, S.M., Blackburn, S.I. and Sikes, E.L., 1995: Alkenones in Gephyrocapsa oceanica: Implications for studies of paleoclimate. Geochimica et Cosmochimica Acta, 59(3): 513–520.
   Google Scholar
• Vörösmarty, C.J., Fekete, B. and Tucker, B.A., 1996: River Discharge Database, Version 1.1 (RivDIS v1.0 supplement). University of New Hampshire. Durham, NH.
   Google Scholar
• Vörösmarty, C.J., Fekete, B. and Tucker, B.A., 1998: River Discharge Database, Version 1.0 (RivDIS v1.0), Volumes 0 through 6, A contribution to IHP‐V Theme 1. Technical Documents in Hydrology Series. UNESCO. Paris.
   Google Scholar
• Wacongne, S. and Piton, B., 1992: The near‐surface circulation in the northeastern corner of the South Atlantic ocean. Deep-Sea Research, 39: 1273–1298.
   Google Scholar
• Weaver, P.P.E., Chapman, M.R., Eglinton, G., Zhao, M., Rutledge, D. and Read, G., 1999: Combined coccolith, foraminiferal, and biomarker reconstruction of paleoceanographic conditions over the past 120 kyr in the northern North Atlantic (59°N, 23°W). Paleoceanography, 14(3): 336–349.
   Google Scholar
• Webb, R.S., Rind, D.H., Lehman, S.J., Healy, R.J. and Sigman, D., 1997: Influence of ocean heat transport on the climate of the Last Glacial Maximum. Nature, 385: 695–699.
   Web of Science ®Google Scholar
• Wefer, G., Berger, W.H., Richter, C., Adams, D.D., Anderson, L. D., Andreasen, D.J., Brüchert, V., Cambray, H., Christensen, B.A., Frost, G.M., Giraudeau, J., Gorgas, T.J., Hermelin, J.O.R., Jansen, J.H.F., Lange, C.B., Laser, B., Lin, H.‐L., Maslin, M., Meyers, P.A., Motoyamu, L, Murray, R. W., Perez, M.E., Pufahl, P.K., Spiess, V., Vidal, L, Wigley, R. and Yamazaki, T., 1998: Proceedings of the Ocean Drilling Program, Initial Reports, 175. Ocean Drilling Program. College Station. Texas.
   Google Scholar
• Williams, D.F. and Healy‐williams, N., 1980: Oxygen isotopic ‐hydrographic relationships among recent planktonic foraminifera from the Indian Ocean, Nature, 283: 848–852.
   Google Scholar
• Williams, D.F., Be, A.W.H. and Fairbanks, R.G., 1979: Seasonal oxygen isotopic variations in living planktonic foraminifera off Bermuda. Science, 206: 447–449.
   Google Scholar
• Wolff, T., Mulitza, S., Rühlemann, C. and Wefer, G., 1999: Response of the tropical Atlantic thermocline to late Quaternary trade wind changes. Paleoceanography, 14: 374–383.
   Google Scholar