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(subm.) Interruption of northeasterly trade winds during Heinrich Stadial 1 megadroughts in the Sahel. Nature Geoscience 
(in press) The Congo deep-sea fan as an archive of Quaternary change in Africa and the eastern tropical South Atlantic. In: Kneller, B, et al. (eds.) External Controls on Deep-Water Depositional Systems, SEPM Special Publication 92, Geological Society of London, London
(in press) Millennial-scale changes in vegetation records from tropical Africa and South America during the last glacial. Quaternary Science Reviews
(2010) Two-step vegetation response to enhanced precipitation in Northeast Brazil during Heinrich event 1|. Global Change Biology, 16 (6), 1647-1660

(2010) Holocene environmental dynamics of south-eastern Brazil recorded in laminated sediments of Lago Aleixo. Journal of Paleolimnology, 44 (1), 265-277 ![]()
(2010) Tropical vegetation evidence for rapid sea level changes associated with Heinrich Events. IODP Conference Series: Earth and Environmental Science, 9 (1) ![]()
(2010) Introduction: Tropical palaeoecology and global change. Global Change Biology, 16 (6), 1645-1646 ![]()
(2009) Palynological evidence for climatic and oceanic variability off NW Africa during the late Holocene. Quaternary Research, 72 (2), 188-197

(2009) Dinoflagellate cyst distribution in marine surface sediments off West Africa (6-17°N) in relation to sea-surface conditions, freshwater input and seasonal coastal upwelling. Marine Micropaleontology, 71(3-4), 113-130

(2009) Tropical salt marsh succession as sea-level indicator during Heinrich events. Quaternary Science Reviews, 28(9-10), 939-946 ![]()
(2009) Vegetation change, goats, and religion: a 2000-year history of land use in southern Morocco. Quaternary Science Reviews, 28, 1434-1448

(2008) Thirty thousand years of vegetation development and climate change in Angola (Ocean Drilling Program Site 1078). Climate of the Past, 4, 107-124

(2008) Neotropical vegetation response to rapid climate changes during the last glacial period: Palynological evidence from the Cariaco Basin. Quaternary Research, 69(2), 217-230 ![]()
(2008) Reconstructing marine productivity of the Cariaco Basin during Marine Isotope Stages 3 and 4 using organic-walled dinoflagellate cysts. Paleoceanography, 23, PA3215 ![]()
(2007) Late Quaternary vegetation and climate dynamics in the Serra da Bocaina, southeastern Brazil. Quaternary International, 161(1), 22-31 ![]()
(2007) Variability in glacial and Holocene marine pollen records offshore from west southern Africa. Vegetation History and Archaeobotany, 16, 87-100

(2006) Late Pliocene vegetation and climate in Namibia (southern Africa) derived from palynology of ODP Site 1082. Geochemistry, Geophysics, Geosystems, 7(1), Q05007

(2006) Land-sea linkages during deglaciation: high resolution records from the eastern Atlantic off the coast of Namibia and Angola (ODP Site 1078). Quaternary International, 148(1), 19-28

(2006) Late Quaternary palynology in marine sediments: A synthesis of the understanding of pollen distribution patterns in the NW African setting. Quaternary International, special issue, 148, 29-44 ![]()
(2006) Glacial/interglacial changes in Southern Africa: compound-specific d13C land plant biomarker and pollen records from Southeast Atlantic continental margin sediments - Part II. Geochemistry, Geophysics, Geosystems, 7(8), Q08010

(2005) Geogrphically differantiated response in vegetation and precipitation around the tropical Atlantic during the Younger Dryas Period. GV-Tagung, Erlangen, Sept. 2005
(2005) Linking desert evolution and coastal upwelling: Pliocene climate change in Namibia. Geology, 33(6), 461-464

(2005) Impacts of rapid sea-level rise on mangrove deposit erosion: Application of taraxerol and Rhizophora records. Journal of Quaternary Science, 20(3), 221-225 ![]()
(2004) Southwest African climate independent of Atlantic sea surface temperatures during the Younger Dryas. Quaternary Research, 61(3), 318-324 ![]()
(2004) Palaeoenvironmental changes in the arid and sub arid belt (Sahara-Sahel-Arabian Peninsula) from 150 kyr to present. In: Batterbee, R.W., Gasse, F., Stickley, C.E. (eds.). Past Climate Variability through Europe and Africa. Springer (Dordrecht), 219-256
(2004) Taraxerol and Rhizophora pollen as proxies for tracking past mangrove ecosystems. Geochimica et Cosmochimica Acta, 68(3), 411-422

(2004) Terrigenous Signals in Sediments of the Low Latitude Atlantic - Implications for Environmental Variations during the Late Quaternary: Part I: Organic Carbon. In: Wefer, G; Mulitza, S & Ratmeyer, V (eds.), The South Atlantic in the Late Quaternary: Reconstruction of Material Budgets and Current Systems, Springer, Berlin, Heidelberg, New York, 295-322
(2003) Pleistocene vegetation change in central Africa recorded off the Congo River. EGS-AGU-EUG Joint Assembly, Nice, France
(2003) Reconstructing pathways of aeolian pollen transport to the marine sediments along the coastline of SW Africa. Quaternary Science Reviews, 22(2-4), 157-174

(2003) Temporal variability of fluxes of eolian-transported freshwater diatoms, phytoliths, and pollen grains off Cape Blanc as reflection of land-atmosphere-ocean interactions in northwest Africa. Journal of Geophysical Research, 108(C5), 3153-3164

(2003) A north to south transect of Holocene southeast Atlantic continental margin sediments: Relationship between aerosol transport and compound-specific d13C land plant biomarker and pollen records. Geochemistry, Geophysics, Geosystems, 4(12), 1101

(2003) n-Alkane and pollen reconstruction of terrestrial climate and vegetation for N.W. Africa over the last 160 kyr. Organic Geochemistry, 34(1), 131-143 ![]()
(2002) Composition, age, and provenance of organic matter in NW African dust over the Atlantic Ocean. Geochemistry, Geophysics, Geosystems, 3(8), 1-27 ![]()
(2001) Mid-Pleistocene environmental change in tropical Africa began as early as 1.05 Ma. Geology, 29(3), 195-198

(2001) Data report: A revised composite depth record for Site 1077 based on magnetic susceptibility and XRF (CORTEX) data. In: Wefer, G., Berger, W.H., and Richter, C. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 175, 1-10

(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(3-4), 311-321

(2000) Mapping of C4 plant input from North West Africa into North East Atlantic sediments. Geochimica et Cosmochimica Acta, 64(20), 3505-3513

(2000) Correlation between vegetation in southwestern Africa and oceanic upwelling in the past 21,000 years. Quaternary Research, 54(1), 72-80 ![]()
(1999) Pollen and spores in marine sediments from the east Atlantic: A view from the ocean into the African continent. In: Fischer, G & Wefer, G (eds.), Use of Proxies in Paleoceanography - Examples from the South Atlantic, Springer, Berlin, Heidelberg, 523-546
(1999) Climatic changes in the Late Pliocene of NW Africa from a pollen record on an astronomically tuned timescale. In: Wrenn, J.H., Suc, J.-P., Leroy, S.A.G. (eds.). The Pliocene, Time of Change. AASP, 145-161
(1999) Marine-terrestrial interaction of climate changes in West Equatorial Africa of the last 190,000 years. Palaeoecology of Africa, 26, 61-84
(1999) Terrestrial Organic Matter in Marine Sediments: Analytical Approaches and Eolian-Marine Records in the Central Equatorial Atlantic. In: Fischer, G & Wefer, G (eds.), Use of Proxies in Paleoceanography - Examples from the South Atlantic, Springer, Berlin, Heidelberg, 547-574 
(1998) Pollen and dinoflagellate cysts of the upper 50 m of Site 958. In: Firth, J. (ed.). Proceedings ODP, Scientific Results, College Station, TX (Ocean Drilling Program), 159T, 23-30

(1998) Land-sea correlation by means of terrestrial and marine palynomorphs from the equatorial East Atlantic: phasing of SE trade winds and the oceanic productivity. Palaeogeography, Palaeoclimatology, Palaeoecology, 142(1-2), 51-84

(1998) Vegetation and climate changes during the last 22,000 yr in SW Africa - evidence from a high resolution marine palynological record. Vegetation History and Archaeobotany, 7, 123-140 
(1997) Marine palynology of the ODP Site 658 (N-W Africa) and its contribution to the stratigraphy of Late Pliocene. Geobios, 30(3), 351-359 ![]()
(1997) Vegetation and climate history of southwest Africa: a marine palynological record of the last 300,000 years. Vegetation History and Archaeobotany, 6, 117-131 
(1996) Podocarpus in West Africa during the Late Pleistocene. Palaeoecology of Africa, 24, 85-101
(1996) Vegetation history of the savanna corridor between the Guinean and the Congolian rain forest during the last 150,000 years. Vegetation History and Archaeobotany, 5, 273-292 
(1995) Lowland rain forest and afromontane forest in West equatorial Africa during the Middle and Late Pleistocene. In: 2nd Symposium on African Palynology, Tervuren (Belgium). Publication Occasionelle CIFEG, 1995/31. Orléans, 87-98
(1995) Steps toward drier climatic conditions in north-western Africa during the Upper Pliocene. In: Vrba, E., Partridge, T., Denton, D. & Burckle, L. (eds.). Palaeoclimate and evolution, with emphasis on human origins. Yale University Press, New Haven, 289-298
(1994) Development of vegetation and continental aridity in northwestern Africa during the Late Pliocene: the pollen record of ODP 658. Palaeogeography, Palaeoclimatology, Palaeoecology, 109(2-4), 295-316

(1993) Vegetation zones in NW Africa during the brunhes chron reconstructed from marine palynological data. Quaternary Science Reviews, 12(3), 189-202 ![]()
(1992) Marine palynology of interglacial-glacial transitions. In: Kukla, G.J. & Went, E. (eds.). Start of a Glacial. NATO ASI Series I3, Springer, 137-155
(1992) Latitudinal shifts of forest and savanna in N.W. Africa during the Brunhes chron: further marine palynological results from site M 16415 (9°N 19°W). Vegetation History and Archaeobotany, 1(3), 163-175

(1992) Vegetational and climatic changes at the northern fringe of the sahara 250,000–5000 years BP: evidence from 4 marine pollen records located between Portugal and the Canary Islands. Review of Palaeobotany and Palynology, 74(1-2), 1-17

(1991) Environmental control of pollen grain distribution patterns in the Gulf of Guinea and offshore NW-Africa. Geologische Rundschau, 80(3), 567-589

(1991) Marine palynological studies off NW Africa. Palaeoecology of Africa, 22, 135-155
(1989) Palynology of the last 680,000 years of ODP Site 658 (off NW-Africa): fluctuations in paleowind systems. In: Leinen, M. & Sarnthein, M. (eds.). Paleoclimatology and Paleometeorology: Modern and Past Patterns of Global Atmospheric Transport. NATO ASI Series C282, Kluwer, 779-794
(1989) First palynological results from ODP Site 658 at 21°N west off Africa: pollen as climate indicators. In: Ruddiman, WF; Sarnthein, M, et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 108, 93-111

(1989) The Saharan-Sahelian boundary during the Brunhes chron. Acta Botanica Neerlandica, 38, 405-415
(1988) Note on a program for plotting of pollen diagrams with an Atari ST microcomputer. Pollen et Spores, 30, 125-130
(1987) Palaeoecological reconstruction of the successive stands of vegetation leading to a raised bog in the Meerstalblok area (the Netherlands). Review of Palaeobotany and Palynology, 51(4), 271-287 ![]()
(1987) Palaeoclimate analysis of 2H/1H ratios in peat sequences with variable plant composition. Chemical Geology, 66, 323-333
(1986) Characterisation of a peat bog profile by Curie point pyrolysis-mass specrometry combined with multivariant analysis and by pyrolysis gas chromatography-mass spectrometry. In: Fuchsman, C.H. (ed.), Peat and Water. Elsevier, 215-239
(1986) Temperature and rainfall variation in the holocene based on comparative palaeoecology and isotope geology of a hummock and a hollow (Bourtangerveen, the Netherlands). Review of Palaeobotany and Palynology, 48(1-3), 71-88 ![]()
(1985) Temperature and rainfall variation in a raised bog ecosystem: a palaeoecological and isotope-geological study. Master Thesis, University of Amsterdam, 62 pp
(1984) Palaeobotanic and isotopic analysis of late subboreal and early subatlantic peat from engbertsdijksveen VII, the Netherlands. Review of Palaeobotany and Palynology, 41(3-4), 241-271 ![]()
(1979) On gene flow between Tetranychus urticae Koch, 1836 and Tetranychus cinnabarinus (Boisduval) Boudraux, 1956 (Acari: Tetranichidae): synonomy between the two species. Entomologica experimentalis & applicata, 25, 297-303
(1979) Note on variation in Diacria Gray, 1847, with descriptions of a species new to science, Diacria rampali nov.spec., and a forma new to science, Diacria trispinosa forma atlantica nov.forma. Malacologia, 18, 37-52