Marine Klimaforschung

Prof. Dr. Ralph Schneider

Leiter der AG

Ludewig-Meyn-Straße 10, R.13
Telefon: +49 (0)431 880 1457
Telefax: +49 (0)431 880 1912


  • Meeresgeologie und Paläoklimatologie
  • Organisch-geochemische Proxymethoden
  • Paläozeanographie und Produktivität im Ozean


  • Südatlantik
  • Indischer Ozean
  • Namibia Auftriebsgebiet
  • Pazifischer Ozean

betreute Arbeiten

  • Johan Etourneau: Nitrogen cycling in lower-latitude upwelling systems related to Plio-Pleistocene climate change, Dissertation, defended in July 2009
  • Elfi Mollier-Vogel: Centennial to millennial scale climate change and low-latitude oxygen minimum conditions, Dissertation
  • Veronica Rohde Krossa: Mid-Holocene climate variability in northern Germany and the adjacent ocean
  • Camille Butruille:Mid Holocene climate variability in nothern Germany and adjacent ocean
  • Emma Khadun: Land-ocean climate linkages in south-east Africa during the last 50.000 years
  • Jeroen van der Lubbe: Geochemical and Lithogenic Provenance Study and Late Quarternary Zambezi Sediment Discharge



  • Northern source for Deglacial and Holocene deepwater composition changes in the Eastern North Atlantic Basin
    [Marine Klimaforschung]


  • Climate and CO2 effects on the vegetation of southern tropical Africa over the last 37,000 years
    [Marine Klimaforschung]


  • Contrasting evolution of sea surface temperature in the Benguela upwelling system under natural and anthropogenic climate forcings
    [Marine Klimaforschung]
  • Holocene and Eemian sea surface trends as revealed by alkenone and Mg/Ca paleothermometry
    [Marine Klimaforschung]
  • Intensification of the Walker and Hadley atmospheric circulations during the Pliocene–Pleistocene climate transition
    [Marine Klimaforschung]
  • Palaeoclimate: Global warmth with little extra CO2
    [Marine Klimaforschung]


  • Constraints on the magnitude and patterns of ocean cooling at the Last Glacial Maximum
    [Marine Klimaforschung]
  • Organic-rich mud on the western margin of southern Africa: Nutrient source to the Southern Ocean?
    [Marine Klimaforschung]
  • Phase relationship between sea level and abrupt climate change
    [Marine Klimaforschung]
  • Pliocene–Pleistocene variability of upwelling activity, productivity, and nutrient cycling in the Benguela region
    [Marine Klimaforschung]


  • A lowering effect of reconstructed Holocene changes in sea surface temperatures on the atmospheric CO2 concentration.
    [Marine Klimaforschung]
  • Advection and scavenging: Effects on ^230^Th and ^231^Pa distribution off Southwest Africa
    [Forschungsbereich 2: Marine Biogeochemie]
  • Climatic cycles as expressed in sediments of the PROMESS1 borehole PRAD1-2, central Adriatic, for the last 370 ka, Part 2: Paleoenvironmental Evolution.
    [Marine Klimaforschung]
  • Disentangling marine, soil and plant organic carbon contributions to continental margin sediments: A multi-proxy approach in a 20,000 year sediment record from the Congo deep-sea fan.
    [Marine Klimaforschung]
  • Late-Holocene climate variability in the Adriatic Sea (Central Mediterranean).
    [Marine Klimaforschung]
  • Pockmarks in the northern Congo Fan area, SW Africa: complex seafloor features shaped by fluid flow
    [Forschungsbereich 4: Dynamik des Ozeanbodens]


  • 155,000 years of West African monsoon and ocean thermal evolution.
    [Marine Klimaforschung]
  • Centennial scale climate instabilities in a wet early Holocene West African monsoon.
    [Marine Klimaforschung]
  • Climatic cycles as expressed in sediments of the PROMESS1 borehole PRAD1-2, central Adriatic, for the last 370 ka, Part 1: Integrated stratigraphy.
    [Marine Klimaforschung]
  • Comparison of Mg/Ca and alkenone-based sea surface temperature estimates in the fresh water-influenced Gulf of Guinea, eastern equatorial Atlantic.
    [Marine Klimaforschung]
  • Impacts of the North Atlantic gyre circulation on Holocene climate off northwest Africa.
    [Marine Klimaforschung]
  • Low-latitude “dusty events” vs. high-latitude “icy Heinrich events”.
    [Marine Klimaforschung]


  • Comparison of foraminiferal cleaning procedures for Mg/Ca paleothermometry on core material deposited under varying terrigenous-input and bottom water conditions.
    [Marine Klimaforschung]
  • Contrary Holocene sea-surface temperature trends between the tropics and the extra-tropics.
    [Marine Klimaforschung]
  • Deglacial sea surface temperature and salinity increase in the western tropical Atlantic in synchrony with high latitude climate instabilities.
    [Marine Klimaforschung]
  • Marine Carbonates (2nd Ed): Their formation and destruction.
    [Marine Klimaforschung]


  • Alkenone production in the upper 200m of the Pacific Ocean.
  • [Marine Klimaforschung]
  • An evaluation of 14C age relationships between co-occuring foraminifera, alkenones, and total organic carbon in continental margins sediments.
  • [Marine Klimaforschung]
  • Climatic controls on central African hydrology during the last 20,000 years.
  • [Marine Klimaforschung]
  • Holocene African Droughts Relate to Eastern Equatorial Atlantic Cooling
  • [Marine Klimaforschung]
  • Multiproxy approach for the reconstruction of the glacial ocean surface (MARGO).
  • [Marine Klimaforschung]
  • Nitrogen Cycling on the Namibian Shelf and Slope over the last two Climatic Cycles : Local and Global Forcings.
  • [Marine Klimaforschung]
  • Response of tropical African and East Atlantic climates to orbital forcing over the last 1.7 Myr.
  • [Marine Klimaforschung]


  • Between Agulhas and Benguela: Response of Southern African Climates of the Late Pleistocene to Current Fluxes, Orbital Precession and the Extent of the Circum-Antarctic Vortex
    [Marine Klimaforschung]
  • Glacial to modern sea surface temperature anomalies in the global ocean as estimated from U-K-37: comparison with GCMs
    [Marine Klimaforschung]
  • Holocene climate variability as derived from alkenone sea surface temperature and coupled ocean-atmosphere model experiments.
    [Marine Klimaforschung]
  • Holocene climate variability.
    [Marine Klimaforschung]
  • Inter-laboratory comparison study of Mg/Ca and Sr/Ca measurements in planktonic foraminifera for paleoceanographic research
    [Marine Klimaforschung]
  • North Pacific and North Atlantic sea-surface temperature variability during the Holocene.
    [Marine Klimaforschung]
  • Organic carbon accumulation in the South Atlantic Ocean: its modern, mid-Holocene and last glacial distribution
    [Marine Klimaforschung]
  • Oscillations of the siliceous imprint in the central Benguela Upwelling System from MIS3 through the early Holocene: the influence of the Southern Ocean
    [Marine Klimaforschung]
  • Provenance of present-day eolian dust collected off NW Africa.
    [Marine Klimaforschung]
  • Relationship between Antarctic sea ice and southwest African climate during the late Quaternary.
    [Marine Klimaforschung]
  • Southwest African climate independent of Atlantic sea surface temperatures during the YoungerDryas
    [Marine Klimaforschung]
  • Stable carbon isotopic composition of the C37:2-alkenone: A proxy for CO2{aq}- concentration?
    [Marine Klimaforschung]
  • The carbon isotopic record of C37:2 alkenones in the South Atlantic: Last Glacial Maximum (LGM) vs. Holocene.
    [Marine Klimaforschung]
  • Vigorous exchange between Indian and Atlantic ocean at the end of the last five glacial periods.
    [Marine Klimaforschung]


  •  Adegbie, A. T., Schneider, R. R., Röhl, U., and Wefer, G., 2003. Glacial millennial-scale fluctuations in central African precipitation recorded in terrigenous sediment supply and freshwater signals offshore Cameroon. Palaeogeogr., Palaeoclimat., Palaeoecol., 197, 323-333.
  • Bayon, G., German, C.R., Nesbitt, R.W., Bertrand, P., and Schneider, R.R., 2003. Increased input of circumpolar deep water-borne detritus to the glacial SE Atlantic Ocean. Geochem. Geophys. Geosyst., 4(3), 1025, doi:10.1029/2002GC000371.
  • Bertrand, P., Pedersen, T., Schneider, R.R., Shimmield, G., Lallier-Verges, E., Disnar, J.R., Massias, D., Villanueva, J., Tribovillard, N., Huc, A.Y., Giraud, X., Pierre, C., and Vénec-Peyré, M.-Th., 2003. Organic-rich sediments in ventilated deep-sea environments: Relationship to climate, sea level and trophic changes. Journ. Geophys. Res., 108, NO. C2, 3045, doi:10.1029/2000JC000327.
  • Jahn, B., Donner, B., Müller, P.J., Röhl, U., Schneider, R.R, and Wefer G., 2003. Environmental changes in the Benguela upwelling system for the last 1.5 Myr: Results from ODP Site 1082. Palaeogeogr., Palaeoclimat., Palaeoecol., 193, 515-533.
  • Kim, J.-H. and Schneider, R.R., 2003. Low-latitude control of interhemispheric sea-surface temperature contrast in the tropical Atlantic over the past 22 kyr: The role of SE trade winds. Clim. Dyn., 21, 337-347, doi 10.1007/s00382-003-0341-5.
  • Kim, J.-H., Schneider, R.R., Mulitza, S., and Müller, P.J., 2003. Reconstruction of SE trade wind intensity based on sea-surface temperature gradients in the SE Atlantic over the last 25 kyr. Geophysical Res. Lett., 30, NO. 22, 2144, doi:10.1029/2003GL017557.
  • Mollenhauer, G., Eglinton, T.I., Ohkouchi, N., Schneider, R.R., Müller, P.J., Grootes, P.M., and J. Rullkötter, J., 2003. Asynchronous alkenone and foraminifera records from the Benguela Upwelling System. Geochim. Cosmochim. Acta, 67 (12), 2157–2171, doi:10.1016/S0016-7037(00)00168-6.
  • Rimbu, N., Lohmann, G., Kim, J.-H., Arz, H., and Schneider, R., 2003. Arctic/North Atlantic oscillation signature in Holocene sea surface temperature trends as obtained from alkenone data. Geophys. Res. Lett., 30(6) 1280, doi:10.1029/2002GL016570.
  • Rodgers, K.B., Lohmann, G., Lorenz, S., Schneider, R.R., and Henderson, G.M., 2003. A tropical mechanism for Northern Hemisphere deglaciation. Geochem. Geophys. Geosyst., 4(5), 1046, doi:10.1029/2003GC000508.


  • Benthien, A., Andersen, N., Müller, P.J., Schneider, R.R., and Wefer, G., 2002. Carbon isotopic composition of C37:2 alkenones in core-top sediments of the South Atlantic Ocean: Effects of CO2 and nutrient concentrations. Glob. Biogeochem. Cycles, 16(1), 10.1029.
  • Kim, J., Schneider, R.R., Hebbeln, D., Müller, P.J., and Wefer, G., 2002. Last deglacial sea-surface temperature evolution in the eastern South Pacific compared to climate changes on the South American continent. Quat. Sci. Rev., 21: 2085-2097.
  • Kim, J., Schneider, R.R., Müller, P.J., and Wefer, G., 2002. Interhemispheric comparison of deglacial sea surface temperature patterns in Atlantic eastern boundary currents. Earth Planet. Sci. Lett. 194: 383-393.
  • Mollenhauer, G., Schneider, R.R., Müller, P.J., Spieß, V., and Wefer, G., 2002. Glacial/interglacial variability in the Benguela upwelling system: Spatial distribution and budgets of organic carbon accumulation. Global Biogeochem. Cycles, 16, NO 4, 1134, doi: 10.1029/2001GB001488.
  • Struck, U., Altenbach, A.V., Emeis, K.-C., Alheit, J., Eichner, C., and Schneider, R.R. 2002. Changes of the upwelling rates of nitrate preserved in the 15N-signature of sediments and fish scales from the diatomaceous mud belt of Namibia, Geobios, 35(1), 3-11. 
  • Stuut, J-B.W., Prins, M.A., Schneider, R.R., Weltje, G.J., Jansen, J.H.F, and Postma, G., 2002. A 300 kyr record of aridity and wind strength in southwestern Africa: evidence from grain-size distributions in sediments on Walvis Ridge, SE Atlantic. Mar. Geol., 180: 221-233
  • Thamban, M., Purnachandra Rao, V., and Schneider, R.R., 2002. Reconstruction of late Quaternary monsoon oscillations based on clay mineral proxies using sediment cores from the western continental margin of India. Mar. Geol., 186: 527-539.


  • Dupont, L., Donner, B., Schneider, R.R., and Wefer, G., 2001. Mid-Pleistocene environmental change in tropical Africa started as early as 1.05 Ma ago (Palynological results of ODP Sites 1075 & 1077). Geology, 29(3): 195-198.
  • Marret, F., Scourse, J., Versteegh, G., Jansen, F., and Schneider, R.R., 2001. Integrated marine and terrestrial evidence for abrupt changes in Congo River palaeodischarge fluctuations during the last deglacial transition. Journ. Quat. Sci. 16(8): 761-766.
  • Mix, A.C., Bard, E., and Schneider, R.R., 2001. Environmental processes of the ice age: land, ocean, glaciers (EPILOG). Quat. Sci. Rev., 20(4): 627-657.
  • Perez, M.E., Lin, H.-L., Lange, C.B., and Schneider, R.R., 2001. Pliocene-Pleistocene opal records off Southwest Africa, Sites 1082 and 1084: A comparison of analytical techniques. In: Wefer, G., Berger, W.H., and Richter, C. (Eds.), Proc. ODP, Sci. Results, 175: 1-16 [Online].
  • Rosell-Melé, A., Bard, E., Emeis, K.-C., Grimalt, J.O., Müller, P.J., Schneider, R.R, and 36 international participants, 2001. Precision of the current methods to measure the alkenone proxy UK´37 and absolute alkenone abundance in sediments: results of an inter-laboratory comparison study. Geochemistry, Geophysics, Geosystems, 2: Paper number 2000GC000141.
  • Schneider, R.R., 2001. Alkenone temperature and carbon isotope records: Temporal resolution, offsets, and regionality. Geochemistry, Geophysics, Geosystems, 2: Paper number 2000GC000060.
  • Shi, N., Schneider, R.R., Beug, H.J., and Dupont, L.M., 2001. Southeast trade wind variations during the last 135 kyr: evidence from pollen spectra in eastern South Atlantic sediments. Earth Planet. Sci. Lett., 5783: 1-11.
  • Thamban, M., Purnachandra Rao, V., Schneider, R.R., and Grootes, P.M., 2001. Glacial to Holocene fluctuations in hydrography and productivity along the northwestern continental margin of India. Palaeogeogr., Palaeoclimat., Palaeoecol., 165: 113-127.
  • Zabel, M., Schneider, R.R., Wagner, T., Adegbie, A.T., DeVries, U., and Kolonic, S., 2001. Late Quaternary climate changes in central Africa as inferred from terrigenous input to the Niger Fan. Quat. Res., 56: 207-217.
  • 2000
  • Budziak, D., Schneider, R.R., Rostek, F., Müller, P.J., Bard, E., and Wefer, G., 2000. Late Quaternary insolation forcing on total organic carbon and C37 alkenone variations in the Arabian Sea. Paleoceanography, 15: 307-322.
  • Esper, O., Zonneveld, K.A.F., Höll, C., Karwarth, B., Kuhlmann, H., Schneider, R.R., Vink, A., Weise-Ihlo, I., and Willems, H., 2000. Reconstruction of paleoceanographic conditions in the South Atlantic Ocean at the last two Terminations based on calcareous dinoflagellate cysts. Geol. Rundschau., 88: 680-693.
  • Nürnberg, D., Müller, 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 UK´37, oxygen isotopes, and foraminiferal transfer function. Paleoceanography, 15: 124-134.
  • Sachs, J.P., Schneider, R.R., Eglinton, T.I., Freeman, K.H., Ganssen G., McManus, J.F., and Oppo, D.W., 2000. Alkenones as paleoceanographic proxies. Geochemistry, Geophysics, Geosystems, 1: Paper number 2000GC000059.
  • Schlünz, B. and Schneider, R.R., 2000. Transport of riverine organic carbon to the oceans: Implications for the carbon cycle. Geol. Rundschau, 88: 599-606.
  • Schlünz, B., Schneider, R.R., Müller, P.J., and Wefer, G., 2000. Late Quaternary organic carbon accumulation off Barbados: Influence of the Orinoco and Amazon rivers? Deep-Sea Res., I47: 1101-1124.
  • Shi, N., Dupont, L., Beug, H.J., and Schneider, R.,R., 2000. Correlation between vegetation in southwestern Africa and oceanic upwelling in the past 21,000 years. Quat. Res., 54: 72-80.
  • Ufkes, E., Jansen, F., and Schneider, R.R., 2000. Anomalous occurrences of Neogloboquadrina pachyderma (left) in a 420-ky upwelling record from Walvis Ridge (SE Atlantic). Mar. Micropaleontology, 40: 23-42.
  • Versteegh, G.J.M., Jansen, J.H.F., De Leeuw, J.W., and Schneider, R.R., 2000. Mid-chain diols and keto-ols in South Atlantic sediments: A new tool for tracing past sea surface water masses? Geochim. Cosmochim. Acta, 64 (11): 1879-1892.
  • Manuskripte
  • Kasten, S., Hensen, C, Schweizer, M., Spieß, V., Blumenberg M., and Schneider R.R., 2004. Gas hydrate dissociation driven by anaerobic oxidation of methane at pockmark sites of the Northern Congo Fan. Geology (in review).
  • Moos, C., Brummer, G.-A., Ganssen, G., Helder, W., Hupe, A., Kloosterhuis, R., Lendt, R., Schneider, R.R., and Wefer, G., 2001. Seasonal and decadal changes in carbon isotope composition of the northwestern Arabian Sea. Deep-Sea Res., (submitted).
  • Moos, C., Schiebel, R., Schneider, R.R., and Wefer, G., 2001. Stable isotopes in planktonic foraminifera recording monsoonal upwelling in the northwestern Arabian Sea. Mar. Micropaleontology, (submitted).
  • Budziak, D., Moos C.A., Schneider, R.R., Müller, and Wefer, G., 2000. Late Quaternary productivity variations in the Arabian Sea induced by meriodinal movements in Findlater jet position. (Manuskript).
  • Budziak, D., Schneider, R.R., Rostek, F., Müller, P.J., Bard, E., and Wefer, G., 2000. Variations of alkenone-derived sea surface temperatures and productivity patterns of C37 alkenones in the Arabian Sea during the Late Quaternary. (Manuskript).
  • Lavik, G., Eichner, C., Mollenhauer, G., Müller, P.J., Schneider, R.R., Struck, U., and Wefer, G., 2000. Nitrogen isotopes in the Benguela upwelling system: Sea-level related offshore migration in the upwelling cell and the impact of denitrification. (Manuskript).
  • Lavik, G., Fischer, G., Schneider, R.R., and Wefer, G., 2000. d15N values of sinking matter and surface sediments in the eastern equatorial Atlantic: Evidence of a northward lateral particle transport. (Manuskript).
  • Lavik, G., Stuut, J.-B., Dupont, L., Schneider, R.R., and Wefer, G., 2000. C and N isotopes and C/N ratios in dust along the African west coast reflecting continental vegetation and climate. (Manuskript).
  • Moos, C.A., Schneider, R.R., and Wefer, G., 2000. Carbon isotopes of planktonic foraminifera recording nutrient and productivity variations in the northwest Arabian Sea during the past 300,000 yr. Geology (Manuskript).
  • Versteegh, G.J.M., Jansen, J.H.F., De Leeuw, J.W., Müller, P.J, Dupont, L., and Schneider, R.R., 2000. Mid-chain diols during the penultimate deglaciation. (Manuskript).


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