Deflation and Humidity During the Last 700 Ka in NW Africa from the Marine Record

  • Bjørg Stabell
Part of the NATO ASI Series book series (ASIC, volume 282)


Freshwater diatoms from a core off Cape Blanc have been used to reconstruct atmospheric circulation and climate on the African continent. Maxima in freshwater diatoms occurred mainly in the late phase of interglacial stages. From the freshwater diatom record it can be inferred that intertropical aridity and increased wind strength was initiated just prior to global icegrowth.


Trade Wind Glacial Stage Freshwater Diatom Interglacial Stage Hole 658A 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. Dupont, L.M., Beug, H.-J., Stalling, H., and Tiedemann, R., in press. Initial palynological results of ODP 661, 659 and 658: Pollen as climate indicators. Init. Repts. ODP Leg 108. Vol. B. Google Scholar
  2. Gasse, F., Stabell, B., Iperen, J. Van, and Fourtanier, E., in press. Freshwater diatom influx in intertropical Atlantic; relationships with continental records from Africa. Quat. Res. Google Scholar
  3. Imbrie, J., Hays, J.D., Martinson, D.G., Mcintyre, A., Mix, A.C., Morley, J.J., Pisias, N.G., Prell, W.L., and Shackleton, N. J., 1984. The orbital theory of Pleistocene climate: support from a revised chronology of the marine Ù18O record. in Berger, A.L. et al. (Eds.), Milankovitch and Climate. Part 1, D. Reidel Publ. Company, 269–305.Google Scholar
  4. Kaland, P.E. & Stabell, B. 1981: Methods for absolute diatom frequency analysis and combined diatom and pollen analysis in sediments. Nord. J. Bot. 1, 697–700.CrossRefGoogle Scholar
  5. Kalu, A. E., 1979. The African dust plume: Its characteristics and propagation across West Africa in winter. in C. Morales (Ed.), Saharan Dust, Mobilization, Transport, Deposition. Wiley, Chichester, pp. 95–118.Google Scholar
  6. Martinson, D.G., Pisias, N.G., Hays, J.D., Imbrie, J., Moore, T.C.Jr. and Shackleton, N.J., 1987. Age Dating and the Orbital Theory of the Ice Ages: Development of a High-Resolution 0 to 300,000-Year Chrono- stratigraphy. Quaternary Research 27, 1 - 29.CrossRefGoogle Scholar
  7. Parmenter, C. and Folger, D.W.,1974. Eolian Biogenic Detritus in Deep Sea Sediments: a possible index of Equatorial Ice Age aridity. Science (Washington, D.C.) 185, 695–698.CrossRefGoogle Scholar
  8. Pokras, E.M. and Mix, A.C.,1985. Eolian Evidence for Spatial Variability of Late Quaternary Climates in Tropical Africa. Quaternary Research 24,137–149.CrossRefGoogle Scholar
  9. Pokras, E. M. and Mix, A. C., 1987. Earth’s precession cycle and Quaternary climatic change in tropical Africa. Nature 326, 486 - 487.CrossRefGoogle Scholar
  10. Pokras, E.M., and Molfino, B.,1986. Oceanographic control of diatom abundances and species distributions in surface sediments of the tropical and southeast Atlantic. Marine Micropaleontology 10, 165–188CrossRefGoogle Scholar
  11. Ruddiman, W., Sarnthein, M., Baldauf, J., et al., 1988. Proc., Init. Repts. (pt. A), ODP, 108. Google Scholar
  12. Sarthein, M., Erlenkeuser, H., and Zahn, R., 1982. Termination I: The response of continental climate in the subtropics as recorded in deep-sea sediments. Bulletin Institut Géologique du Bassin d’Aquitaine 31, 393 - 407.Google Scholar
  13. Sarnthein, M. and Tiedemann, R., in press. Towards a high-resolution stable isotope stratigraphy of the last 3.3 Million years, ODP Sites 658 and 659 off Northwest Africa. Init. Repts. ODP Leg 108. Vol. B. Google Scholar
  14. Stabell, B.,1986. Variations of diatom flux in the eastern equatorial Atlantic during the last 400.000 years (″Meteor″ cores 13519 and 13521). Marine Geology 72, 305–323.CrossRefGoogle Scholar
  15. Stabell, B., in press. Initial diatom record of ODP Sites 657 and 658; On the history of upwelling and continental aridity. Init. Repts. ODP Leg 108. Vol. B. Google Scholar

Copyright information

© Kluwer Academic Publishers 1989

Authors and Affiliations

  • Bjørg Stabell
    • 1
    • 2
  1. 1.Geological-Paleontological InstituteUniversity of KielKielGermany
  2. 2.Department of GeologyUniversity of OsloBlindernNorway

Personalised recommendations