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Itambi, Achakie C; von Dobeneck, Tilo; Mulitza, Stefan; Bickert, Torsten; Heslop, David (2010): Rock magnetic, element, and color data of three sediment cores along the Senegalese continental margin. PANGAEA, https://doi.org/10.1594/PANGAEA.734826, Supplement to: Itambi, AC et al. (2009): Millennial-scale northwest African droughts related to Heinrich events and Dansgaard-Oeschger cycles: Evidence in marine sediments from offshore Senegal. Paleoceanography, 24, PA1205, https://doi.org/10.1029/2007PA001570

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Abstract:
We present a suite of new high-resolution records (0-135 ka) representing pulses of aeolian, fluvial, and biogenic sedimentation along the Senegalese continental margin. A multiproxy approach based on rock magnetic, element, and color data was applied on three cores enclosing the present-day northern limit of the ITCZ. A strong episodic aeolian contribution driven by stronger winds and dry conditions and characterized by high hematite and goethite input was revealed north of 13°N. These millennial-scale dust fluxes are synchronous with North Atlantic Heinrich stadials. Fluvial clay input driven by the West African monsoon predominates at 12°N and varies at Dansgaard-Oeschger time scales while marine productivity is strongly enhanced during the African humid periods and marine isotope stage 5. From latitudinal signal variations, we deduce that the last glacial ITCZ summer position was located between core positions at 12°26' and 13°40'N. Furthermore, this work also shows that submillennial periods of aridity over northwest Africa occurred more frequently and farther south than previously thought.
Project(s):
Center for Marine Environmental Sciences (MARUM)
Coverage:
Median Latitude: 13.891250 * Median Longitude: -18.334417 * South-bound Latitude: 12.434000 * West-bound Longitude: -18.419000 * North-bound Latitude: 15.610000 * East-bound Longitude: -18.217167
Date/Time Start: 2005-06-14T14:48:00 * Date/Time End: 2005-06-22T14:20:00
Event(s):
GeoB9506-1 (291) * Latitude: 15.610000 * Longitude: -18.350167 * Date/Time: 2005-06-14T14:48:00 * Elevation: -2956.0 m * Recovery: 9.85 m * Campaign: M65/1 * Basis: Meteor (1986) * Method/Device: Gravity corer (Kiel type) (SL) * Comment: geology, 985 cm
GeoB9516-5 (301) * Latitude: 13.673333 * Longitude: -18.419000 * Date/Time: 2005-06-17T22:22:00 * Elevation: -3504.0 m * Recovery: 8.55 m * Campaign: M65/1 * Basis: Meteor (1986) * Method/Device: Gravity corer (Kiel type) (SL) * Comment: geology, 855 cm
GeoB9527-5 (312) * Latitude: 12.434000 * Longitude: -18.217167 * Date/Time: 2005-06-22T14:20:00 * Elevation: -3679.0 m * Recovery: 10.16 m * Campaign: M65/1 * Basis: Meteor (1986) * Method/Device: Gravity corer (Kiel type) (SL) * Comment: geology, 1016 cm
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
16 datasets

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Datasets listed in this publication series

  1. Itambi, AC (2010): Age model of sediment core GeoB9506-1. https://doi.org/10.1594/PANGAEA.734373
  2. Itambi, AC (2010): Cluster membership coefficients of sediment core GeoB9506-1. https://doi.org/10.1594/PANGAEA.734527
  3. Itambi, AC (2010): Environmental magnetic records of sediment core GeoB9506-1. https://doi.org/10.1594/PANGAEA.734383
  4. Itambi, AC (2010): X-ray fluorescence measurements (Ti, Ca and Fe) of sediment core GeoB9506-1. https://doi.org/10.1594/PANGAEA.734380
  5. Itambi, AC (2010): Si/Al, Ti/Al and Fe/Ca ratios of sediment core GeoB9506-1. https://doi.org/10.1594/PANGAEA.734377
  6. Itambi, AC (2010): Age model of sediment core GeoB9516-5. https://doi.org/10.1594/PANGAEA.734374
  7. Itambi, AC (2010): Cluster membership coefficients of sediment core GeoB9516-5. https://doi.org/10.1594/PANGAEA.734528
  8. Itambi, AC (2010): End-member analysis of sediment core GeoB9516-5. https://doi.org/10.1594/PANGAEA.734815
  9. Itambi, AC (2010): Environmental magnetic records of sediment core GeoB9516-5. https://doi.org/10.1594/PANGAEA.734385
  10. Itambi, AC (2010): X-ray fluorescence measurements (Ti, Ca and Fe) of sediment core GeoB9516-5. https://doi.org/10.1594/PANGAEA.734381
  11. Itambi, AC (2010): Si/Al, Ti/Al and Fe/Ca ratios of sediment core GeoB9516-5. https://doi.org/10.1594/PANGAEA.734378
  12. Itambi, AC (2010): Age model of sediment core GeoB9527-5. https://doi.org/10.1594/PANGAEA.734375
  13. Itambi, AC (2010): Cluster membership coefficients of sediment core GeoB9527-5. https://doi.org/10.1594/PANGAEA.734530
  14. Itambi, AC (2010): Environmental magnetic records of sediment core GeoB9527-5. https://doi.org/10.1594/PANGAEA.734386
  15. Itambi, AC (2010): X-ray fluorescence measurements (Ti, Ca and Fe) of sediment core GeoB9527-5. https://doi.org/10.1594/PANGAEA.734382
  16. Itambi, AC (2010): Si/Al, Ti/Al and Fe/Ca ratios of sediment core GeoB9527-5. https://doi.org/10.1594/PANGAEA.734379