Hostname: page-component-cd9895bd7-jn8rn Total loading time: 0 Render date: 2024-12-27T13:16:37.388Z Has data issue: false hasContentIssue false
  • English
  • Français

African Monsoonal Precipitation Modulated by Interhemispheric Temperature Gradients

Published online by Cambridge University Press:  20 January 2017

Stefan Mulitza  and
Carsten Rühlemann
Stefan Mulitza
Affiliation:
Universität Bremen, Fachbereich Geowissenschaften, Bremen, Germany, E-mail: [email protected]
Carsten Rühlemann
Affiliation:
Universität Bremen, Fachbereich Geowissenschaften, Bremen, Germany, E-mail: [email protected]
Get access Rights & Permissions [Opens in a new window]

Abstract

The deglacial pattern of a high-resolution alkenone-derived temperature record from the southeastern tropical Atlantic was compared with one from the northeastern subtropical Atlantic. During Termination 1b, surface waters in the eastern tropical Atlantic (6°S) reached modern temperatures, whereas those in the subtropical northeastern Atlantic (21°N) were still considerably colder than today. This asymmetrical warming may reflect meltwater-induced reductions in the northward heat transport and helps to explain rapid changes in monsoonal precipitation over Africa during the early Holocene.

Type
Short Paper
Information
Quaternary Research , Volume 53 , Issue 2 , March 2000 , pp. 270 - 274
Copyright
University of Washington

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Barber, D.C, Dyke, A, Hillaire-Marcel, C, Jennings, A.E, Andrews, J.T, Kerwin, M.W, Bilodeau, G, McNeely, R, Southon, J, Morehead, M.D, Gagnon, J.-M, (1999). Forcing of the cold event of 8,200 years ago by catastrophic drainage of Laurendtide lakes.. Nature 400, 344–348.Google Scholar
Bard, E, Pichon, J.-J, Arnold, M, Duprat, J, Moyes, J, Duplessy, J.-C, (1990). The last deglaciation in the Southern and Northern Hemispheres: A comparision based on δ18O, sea surface temperature estimates and accelerator 14C dating from deep sea sediments.. NATO ASI Series. Series C: Mathematical and Physical Science p. 405–415.Google Scholar
Berger, W.H, Vincent, E, (1986). Sporadic shutdown of North Atlantic deep water production during the Glacial–Holocene transition.. Nature 324, 53–55.Google Scholar
Berger, W.H, (1990). The Younger Dryas cold spell—A quest for causes.. Palaeogeography, Palaeoclimatology, Palaeoecology 49, 189–206.Google Scholar
Boyle, E.A, Keigwin, L, (1987). North Atlantic thermohaline circulation during the past 20,000 years linked to high-latitude surface temperature.. Nature 330, 35–40.Google Scholar
Butzer, K.W, Isaac, G.L, Richardson, J.L, Washbourn-Kamau, C, (1972). Radiocarbon dating of East African lake levels.. Science 175, 1069–1076.Google Scholar
Chapman, M.R, Shackleton, N.J, Zhao, M, Eglington, G, (1996). Faunal and alkenone reconstructions of subtropical North Atlantic surface hydrography and paleotemperature over the last 28 kyr.. Paleoceanography 11, 343–357.CrossRefGoogle Scholar
DeMenocal, P.B, Rind, D, (1993). Sensitivity of Asian and African climate to variations in seasonal insolation, glacial ice cover, sea surface temperature, and Asian orography.. Journal of Geophysical Research 98, 7265–7287.CrossRefGoogle Scholar
Druyan, L.M, (1987). GCM studies of African summer monsoon.. Climate Dynamics 2, 117–126.Google Scholar
Emiliani, C, (1954). Depth habitat of some species of pelagic foraminifera as indicated by oxygen isotope ratio.. American Journal of Science 252, 149–158.CrossRefGoogle 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.Google Scholar
Folland, C.K, Palmer, T.N, Parker, D.E, (1986). Sahel rainfall and worldwide sea temperatures, 1901–85.. Nature 320, 602–607.Google Scholar
Gasse, F, Van Campo, E, (1994). Abrupt post glacial climate events in West Asia and North African monsoon domains.. Earth and Planetary Science Letters 126, 435–456.Google Scholar
Giresse, P, Bongo-Passi, G, Delibrias, G, Duplessy, J.-C, (1982). La lithostratigraphie des sédiments hémipelagiques du delta profond du fleuve Congo et ses indications sur les paéoclimats de la fin du Quaternaire.. Bulletin de la Société Geologigue de France 7, 803–815.CrossRefGoogle Scholar
Hastenrath, S, (1980). Heat budget of tropical ocean and atmosphere.. Journal of Physical Oceanography 10, 159–170.Google Scholar
Hewitt, C.D, Mitchell, J.F.B, (1998). A fully coupled GCM simulation of the climate of the mid-Holocene.. Geophysical Research Letters 25, 361–364.Google Scholar
Kirst, G, Schneider, R.R, Müller, P, von Storch, I, (1999). Late Quaternary temperature variability in the Benguela Current system derived from alkenones.. Quaternary Research 52, 92–103.Google Scholar
Kutzbach, J.E, (1981). Monsoon climate of the Early Holocene.. Science 214, 59–61.CrossRefGoogle ScholarPubMed
Kutzbach, J.E, Otto-Bliesner, B.L, (1982). The sensitivity of the African–Asian monsoonal climate to orbital parameter changes for 9000 years B.P. in a low-resolution general circulation model.. Journal of Atmospheric Science 39, 1177–1188.Google Scholar
Kutzbach, J.E, Street-Perrott, F.A, (1985). Milankovitch forcing of fluctuations in the level of tropical lakes from 18 to 0 kyr BP.. Nature 317, 130–134.CrossRefGoogle Scholar
Kutzbach, J.E, Liu, Z, (1997). Response of the African Monsoon to orbital forcing and ocean feedbacks in the middle Holocene.. Science 278, 440–443.CrossRefGoogle Scholar
Lamb, P.J, (1978). Case studies of tropical Atlantic surface circulation patterns during recent sub-Saharan weather anomalies: 1967 and 1968.. Monthly Weather Review 106, 482–491.Google Scholar
Lough, J, (1986). Tropical Atlantic sea surface temperatures and rainfall variations in sub-Saharan Africa.. Monthly Weather Review 114, 561–570.Google Scholar
Manabe, S, Stouffer, R.J, (1997). Coupled ocean–atmosphere model response to freshwater input: Comparision to Younger Dryas event.. Paleoceanography 12, 321–336.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 B.P.. Paleoceanography 1, 43–66.CrossRefGoogle Scholar
Mulitza, S, (1991). Zur Isotopenstratigraphie und Klimageschichte der Kongo-Region anhand des Schwerelotkernes GeoB 1007-4.. University of Bremen, .Google Scholar
Olausson, E, (1965). Evidence of climatic changes in North Atlantic deep-sea cores with remarks on isotopic paleotemperatures analysis.. Progress in Oceanography 3, 221–252.CrossRefGoogle Scholar
Pastouret, L, Chamley, H, Delibrias, G, Duplessy, J.C, Thiede, J, (1978). Late Quaternary climatic changes in western tropical Africa deduced from deep-sea sedimentation off the Niger delta.. Oceanologica Acta 1, 217–232.Google Scholar
Prahl, F.G, Muehlhausen, L.A, Zahnle, D.L, (1988). Further evaluation of long-chain alkenones as indicators of paleoceanographic conditions.. Geochimica et Cosmochimica Acta 52, 2303–2310.Google Scholar
Shackleton, N.J, Opdyke, N.D, (1973). Oxygen isotope and paleomagnetic stratigraphy of equatorial Pacific core V 28-238: Oxygen isotope temperatures and ice volumes on a 105 year scale.. Quaternary Research 3, 39–55.CrossRefGoogle Scholar
Street, F.A, Grove, A.T, (1979). Global maps of lake-level fluctuations since 30,000 years B.P.. Quaternary Research 12, 83–118.Google Scholar
Street-Perrott, F.A, Harrison, S.P, (1984). Temporal variations in lake levels since 30,000 yr BP—An index of the global hydrological cycle.. Geophysical Monographs 29, 118–129.Google Scholar
Street-Perrott, F.A, Perrott, R.A, (1990). Abrubt climate fluctuations in the tropics: The influence of Atlantic Ocean circulation.. Nature 343, 607–612.Google Scholar
Talbot, M.R, Livingstone, P.G, Palmer, P.G, Maley, J, Melack, J.M, Delibrias, G, Gulliksen, S, (1984). Preliminary results from sediment cores from Lake Bosumtwi Ghana.. Paleoecology of Africa 16, 173–192.Google Scholar
Wohlfarth, B, (1996). The chronology of the Last Termination: A review of radiocarbon-dated, high-resolution terrestrial stratigraphies.. Quaternary Science Reviews 15, 267–284.Google Scholar
Zhao, M, Beveridge, N.A.S, Shackleton, N.J, Sarnthein, M, Eglington, G, (1995). Molecular stratigraphy of cores off northwest Africa: Sea surface temperature history over the last 80 ka.. Paleoceanography 10, 661–675.Google Scholar