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Anderson, David M; Prell, Warren L (1991): Planktic foraminifera from ODP Hole 117-723B [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.728427, Supplement to: Anderson, DM; Prell, WL (1991): Coastal upwelling gradient during the Late Pleistocene. In: Prell, WL; Niitsuma, N; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 117, 265-276, https://doi.org/10.2973/odp.proc.sr.117.144.1991

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Abstract:
Upwelling occurs during the summer off the coast of Oman when the Asian monsoon produces strong southwest winds in the northern Arabian Sea. Ekman transport driven by the southwest monsoon winds upwells cool nutrient-rich waters along the coast which contrast with the warmer, less productive waters offshore. The spatial pattern of foraminifers in the sediments corresponds with the coastal environmental gradient. The upwelling species Globigerina bulloides dominates the sediment assemblage on the continental margin, while Globigerinita glutinata is more abundant offshore, creating a coastal gradient in fauna. We reconstructed the upwelling faunal gradient using high resolution oxygen isotope stratigraphy to correlate between Hole 723B on the Oman Margin, and a core from the Owen Ridge (RC2761), adjacent Site 722. A gradient similar in magnitude to the present, implying upwelling conditions similar to today existed during each interglacial time during the late Pleistocene interval from 0 to 300 k.y. The gradient was reduced or absent during glacial times implying diminshed southwest winds along the coast of Oman, not strong enough to produce an environmental gradient between the coast and offshore sites.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: 17.915533 * Median Longitude: 57.649400 * South-bound Latitude: 17.643000 * West-bound Longitude: 57.608100 * North-bound Latitude: 18.051800 * East-bound Longitude: 57.732000
Date/Time Start: 1986-05-25T00:00:00 * Date/Time End: 1987-09-19T14:15:00
Event(s):
117-723B * Latitude: 18.051800 * Longitude: 57.608100 * Date/Time Start: 1987-09-17T04:30:00 * Date/Time End: 1987-09-19T14:15:00 * Elevation: -817.0 m * Penetration: 429 m * Recovery: 295.84 m * Location: Arabian Sea * Campaign: Leg117 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 44 cores; 400.1 m cored; 0 m drilled; 73.9 % recovery
RC27-04 * Latitude: 17.643000 * Longitude: 57.732000 * Date/Time: 1986-05-25T00:00:00 * Elevation: -1276.0 m * Recovery: 5.86 m * Location: Indian Ocean * Campaign: RC27 * Basis: Robert Conrad * Method/Device: Piston corer (PC) * Comment: depth not available
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
3 datasets

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Datasets listed in this publication series

  1. Anderson, DM; Prell, WL (1991): (Appendix B) Communality and factor loadings for ODP Hole 117-723B. https://doi.org/10.1594/PANGAEA.728425
  2. Anderson, DM; Prell, WL (1991): (Appendix A) Planktic foraminifer abundance of ODP Hole 117-723B. https://doi.org/10.1594/PANGAEA.728421
  3. Anderson, DM; Prell, WL (1991): (Appendix B) Communality and factor loadings for sediment core RC27-4. https://doi.org/10.1594/PANGAEA.728426