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Southwest African climate independent of Atlantic sea surface temperatures during the Younger Dryas

Published online by Cambridge University Press:  20 January 2017

Lydie M. Dupont ,
Jung-Hyun Kim ,
Ralph R. Schneider  and
Ning Shi
Lydie M. Dupont*
Affiliation:
Geosciences, University of Bremen, P.O. Box 330440, D-28334 Bremen, Germany
Jung-Hyun Kim
Affiliation:
Geosciences, University of Bremen, P.O. Box 330440, D-28334 Bremen, Germany
Ralph R. Schneider
Affiliation:
Geosciences, University of Bremen, P.O. Box 330440, D-28334 Bremen, Germany
Ning Shi
Affiliation:
Palynology and Quaternary Sciences, University of Göttingen, Göttingen, Germany
*
*Corresponding author.E-mail address:[email protected] (L.M. Dupont).
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Abstract

To investigate land–sea interactions during deglaciation, we compared proxies for continental (pollen percentages and accumulation rates) and marine conditions (dinoflagellate cyst percentages and alkenone-derived sea surface temperatures). The proxies were from published data from an AMS-radiocarbon-dated sedimentary record of core GeoB 1023-5 encompassing the past 21,000 years. The site is located at ca. 2000 m water depth just north of the Walvis Ridge and in the vicinity of the Cunene River mouth. We infer that the parallelism between increasing sea surface temperatures and a southward shift of the savanna occurred only during the earliest part of the deglaciation. After the Antarctic Cold Reversal, southeast Atlantic sea surface temperatures no longer influenced the vegetation development in the Kalahari. Stronger trade winds during the Antarctic Cold Reversal and the Younger Dryas period probably caused increased upwelling off the coast of Angola. A southward shift of the Atlantic anti-cyclone could have resulted in both stronger trade winds and reduced impact of the Westerlies on the climate of southwestern Africa.

Keywords

PollenDinoflagellate cystsAlkenonesSSTDeglaciationSouthwestern Africa
Type
Research Article
Information
Quaternary Research , Volume 61 , Issue 3 , May 2004 , pp. 318 - 324
Copyright
University of Washington

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References

Abell, P.I, Plug, I, (2000). The Pleistocene/Holocene transition in South Africa: evidence for the Younger Dryas event. Global and Planetary Change. 26, 173–179.CrossRefGoogle Scholar
Blunier, T, Brook, E, (2001). Timing of millennial-scale climate change in Antarctica and Greenland during the last glacial period. Science. 291, 109–112.Google Scholar
Blunier, T, Chappellaz, J, Schwander, J, Dällenbach, A, Stauffer, B, Stocker, T, Raynaud, D, Jouzel, J, Clausen, H.B, Hammer, C.U, Johnsen, S.J, (1998). Asynchrony of Antarctic and Greenland climate change during the last glacial period. Nature. 394, 739–743.Google Scholar
Cockcroft, M.J, Wilkinson, M.J, Tyson, P.D, (1987). The application of a present-day climatic model to the Late Quaternary in southern Africa. Climate Change. 10, 161–181.Google Scholar
Deacon, H.J, Deacon, J, Scholtz, A, Thackeray, J.F, Brink, J.S, Vogel, J.C, (1984). Correlation of palaeoenvironmental data from the Late Pleistocene and Holocene deposits. Vogel, J.C, Late Caenozoic Palaeoclimates of the Southern Hemisphere. Balkema, Rotterdam., 339–351.Google Scholar
Deacon, J, Lancaster, N, (1988). Late Quaternary Palaeoenvironments of Southern Africa. Clarendon Press, Oxford.Google Scholar
Dupont, L.M, Wyputta, U, (2003). Reconstructing pathways of aeolian pollen transport to the marine sediments along the coastline of SW Africa. Quaternary Science Reviews. 22, 157–174.Google Scholar
Eitel, B, Blümel, W.D, Hüser, K, (2002). Environmental transitions between 22 ka and 8 ka in monsoonally influenced Namibia—a preliminary chronology. Zeitschrift für Geomorphologie, Supplement-Band. 126, 31–57.Google Scholar
Gasse, F, (2000). Hydrological changes in the African tropics since the Last Glacial Maximum. Quaternary Science Reviews. 19, 189–211.Google Scholar
Gasse, F, Lédée, V, Massault, M, Fontes, J.C, (1989). Water-level fluctuations of Lake Tanganyika in phase with oceanic changes during the last glaciation and deglaciation. Nature. 342, 57–59.Google Scholar
Gasse, F, Van Campo, E, (1998). A 40,000-yr pollen and diatom record from Lake Tritrivakely, Madagascar, in the southern tropics. Quaternary Research. 49, 311–399.CrossRefGoogle Scholar
Grootes, P.M, Stuiver, M, White, J.W.C, Johnson, S, Jouzel, J, (1993). Comparison of oxygen isotope records from GISP2 and GRIP Greenland ice cores. Nature. 366, 552–554.Google Scholar
Harrison, S.P, Metcalfe, S.E, Street-Perrot, F.A, Pittock, A.B, Roberts, C.N, Salinger, M.J, (1984). A climatic model of the last glacial/interglacial transition based on palaeotemperature and palaeohydrological evidence. Vogel, J.C, Late Caenozoic Palaeoclimates of the Southern Hemisphere. Balkema, Rotterdam., 21–34.Google Scholar
Hastenrath, S, (1991). Climate and Circulation of the Tropics. Kluwer, Dordrecht.Google Scholar
Heine, K, (1998). Late Quaternary climate changes in the Central Namib Desert, Namibia. Alsharhan, A, Glennie, K, Whittle, A, Kendall, R, Quaternary Deserts and Climatic Change. Balkema, Rotterdam., 293–304.Google Scholar
Höflich, O, (1984). Climate of the South Atlantic ocean. Loon, H.V, Climate of the Oceans. World Survey of Climatology. vol. 15, Elsevier, Amsterdam., 1–191.Google Scholar
Johnsen, S.J, Dansgaard, W, Clausen, H.B, Langway, C.C Jr., (1972). Oxygen isotopes profiles through the Antarctic and Greenland ice sheets. Nature. 235, 429–434.Google Scholar
Johnson, T.C, Brown, E.T, McManus, J, Barry, S, Barker, P, Gasse, F, (2002). A high-resolution paleoclimate record spanning the past 25,000 years in southern East Africa. Science. 296, 113–116.Google Scholar
Kim, J.H, Schneider, R.R, Müller, P.J, 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, Müller, P.J, Von Storch, I, Wefer, G, (1999). Late Quaternary temperature variability in the Benguela Current system derived from alkenones. Quaternary Research. 52, 92–103.Google Scholar
Kitoh, A, Murakami, S, (2002). Tropical Pacific climate at the mid-Holocene and the Last Glacial Maximum simulated by a coupled ocean–atmosphere general circulation model. Paleoceanography. 17, 1047–1059.CrossRefGoogle Scholar
Lancaster, N, (2002). How dry was dry—Late Pleistocene palaeoclimates in the Namib Desert. Quaternary Science Reviews. 21, 769–782.Google Scholar
Lee-Thorp, J.A, Beaumont, P.B, (1995). Vegetation and seasonality shifts during the late Quaternary deduced from 13C/12C ratios of grazers at Equus Cave, South Africa. Quaternary Research. 43, 426–432.CrossRefGoogle Scholar
Linder, H.P, (2003). The radiation of the Cape flora, southern Africa. Biological Reviews. 78, 597–638.CrossRefGoogle ScholarPubMed
Marret, F, Zonneveld, K.A.F, (2003). Atlas of modern organic-walled dinoflagellate cyst distribution. Review of Palaeobotany and Palynology. 125, 1–200.CrossRefGoogle Scholar
Meadows, M.E, (2001). The role of Quaternary environmental change in the evolution of landscapes: case studies from southern Africa. Catena. 42, 39–57.Google Scholar
Meadows, M.E, Baxter, A.J, (1999). Late Quaternary palaeoenvironments of the southwestern Cape, South Africa: a regional synthesis. Quaternary International. 57/58, 193–206.Google Scholar
Meadows, M.E, Sugden, J.M, (1991). A vegetation history of the last 14 000 years on the Cederberg, south-western Cape Province. South African Journal of Science. 87, 34–43.Google Scholar
Meese, D, Gow, A, Alley, R, Zielinski, G, Grootes, P, Ram, M, Taylor, K, Mayewski, P, Bolzan, J, (1997). The Greenland Ice Sheet Project 2 depth-age scale: methods and results. Journal Geophysical Research. 102, C12 26411–26424.Google Scholar
Mollenhauer, G, Eglinton, T.I, Ohkouchi, N, Schneider, R.R, Müller, P.J, Grootes, P.M, Rullkötter, J, (2003). Asynchronous alkenone and foraminifera records from the Benguela Upwelling System. Geochimica et Cosmochimica Acta. 67, 2157–2171.Google Scholar
Morgan, V, Delmotte, M, Van Ommen, T, Jouzel, J, Chappellaz, J, Woon, S, Masson-Delmotte, V, Raynaud, D, (2002). Relative timing of deglacial climate events in Antarctica and Greenland. Science. 297, 1862–1864.Google Scholar
Nicholson, S.E, Flohn, H, (1980). African environmental and climatic changes and the general atmospheric circulation in late Pleistocene and Holocene. Climate Change. 2, 313–348.Google Scholar
Ohkouchi, N, Eglinton, T.I, Keigwin, L.D, Hays, J.M, (2002). Spatial and temporal offsets between proxy records in a sediment drift. Science. 298, 1224–1227.Google Scholar
Partridge, T.C, Scott, L, Hamilton, J.E, (1999). Synthetic reconstructions of southern African environments during the last glacial maximum (21–18 kyr) and the Holocene Altithermal (8–6 kyr). Quaternary International. 57/58, 207–214.Google Scholar
Sachs, J.P, Anderson, R.F, Lehman, S.J, (2001). Glacial surface temperatures of the Southeast Atlantic Ocean. Science. 293, 2077–2079.Google Scholar
Schalke, H.J.W.G, (1973). The upper Quaternary of the Cape Flats area (Cape Province, South Africa). Scripta Geologica. 15, 1–57.Google Scholar
Scott, L, (1989). Climatic conditions in southern Africa since the last glacial maximum, inferred from pollen analysis. Palaeogeography, Palaeoclimatology, Palaeoecology. 70, 345–353.Google Scholar
Scott, L, Steenkamp, M, Beaumont, P.B, (1995). Palaeoenvironmental conditions in South Africa at the Pleistocene–Holocene transition. Quaternary Science Reviews. 14, 937–947.Google Scholar
Scott, L, Vogel, J.C, (2000). Evidence for environmental conditions during the last 20,000 years in Southern Africa from 13C in fossil hyrax dung. Global and Planetary Change. 26, 207–215.Google Scholar
Shi, N, Dupont, L.M, (1997). Vegetation and climatic history of southwest Africa: a marine palynological record of the last 300,000 years. Vegetation History and Archaeobotany. 6, 117–131.Google Scholar
Shi, N, Dupont, L.M, Beug, H.J, Schneider, R.R, (1998). Vegetation and climate changes during the last 21,000 years in S.W. Africa based on a marine pollen record. Vegetation History and Archaebotany. 7, 127–140.Google Scholar
Shi, N, Dupont, L.M, Beug, H.J, Schneider, R.R, (2000). Correlation between vegetation in southwestern Africa and oceanic upwelling in the past 21,000 years. Quaternary Research. 54, 72–80.Google Scholar
Shi, N, Schneider, R.R, Beug, H.J, Dupont, L.M, (2001). Southeast trade wind variations during the last 135 kyr: evidence from pollen spectra in eastern South Atlantic sediments. Earth and Planetary Science Letters. 187, 311–321.Google Scholar
Stokes, S, Thomas, D.S.G, Washington, R, (1997). Multiple episodes of aridity in southern Africa since the last interglacial period. Nature. 388, 154–158.CrossRefGoogle Scholar
Stute, M, Talma, A.S, (1998). Glacial temperatures and moisture transport regimes reconstructed from noble gases and d18O, Stampriet Aquifer, Namibia. Isotope Techniques in the Study of Environmental Change. Proceedings of Symposium of International Atomic Energy Agency, Vienna, 1997. 307–318.Google Scholar
Stuut, J.B.W., (2002). Late Quaternary southwestern African terrestrial-climate signals in the marine record of Walvis ridge, SE Atlantic Ocean. Geologica Ultraiectina 212, 1–128 (Thesis, University of Utrecht, ).Google Scholar
Stuut, J.B.W, Prins, M.A, Schneider, R.R, Weltje, G.J, Jansen, J.H.F, Postma, G, (2002). A 300-kyr record of aridity and wind strength in southwestern Africa: inferences from grain-size distributions of sediments on Walvis Ridge, SE Atlantic. Marine Geology. 180, 221–233.Google Scholar
Talma, A.S, Vogel, J.C, (1992). Late Quaternary paleotemperatures derived from a speleothem from Cango Caves, Cape Province, South Africa. Quaternary Research. 37, 203–213.Google Scholar
Tyson, P.D, (1986). Climatic Change and Variability in Southern Africa. Oxford Univ. Press, Cape Town.Google Scholar
Van Zinderen Bakker, E.M, (1976). The evolution of late Quaternary palaeoclimates of southern Africa. Palaeoecology of Africa. 9, 160–202.Google Scholar
Van Zinderen Bakker, E.M, Coetzee, J.A, (1988). A review of late Quaternary pollen studies in east, central and southern Africa. Review of Palaeobotany and Palynology. 55, 155–174.Google Scholar
Versteegh, G.J.M, Zonneveld, K.A.F, (2002). Use of selective degradation to separate preservation from productivity. Geology. 30, 615–618.Google Scholar
Visser, K, Thunell, R, Scott, L, (2003). Magnitude and timing of temperature change in the Indo-Pacific warm pool during deglaciation. Nature. 421, 152–155.Google Scholar
Vogel, J.C, (1978). Isotopic assessment of the dietary habitats of ungulates, South African. Journal of Science. 74, 298–301.Google Scholar
Vogel, J.C, (1989). Evidence of past climatic change in the Namib Desert. Palaeogeography, Palaeoclimatology, Palaeoecology. 70, 355–366.Google Scholar
Zonneveld, K.A.F, Hoek, R.P, Brinkhuis, H, Willems, H, (2001). Geographical distributions of organic-walled dinoflagellate cysts in superficial sediments of the Benguela upwelling region and their relationship to upper ocean conditions. Progress in Oceanography. 48, 25–72.Google Scholar