| PALEOCEANOGRAPHY |
Northern Red Sea (GeoB5836-2) Alkenone SST and High Resolution Sediment Data
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Arz, H.W., F. Lamy, and J. Pätzold. 2006. A pronounced dry event recorded around 4.2 ka in brine sediments from the northern
Red Sea. Quaternary Research, 66(3), 432-441.
| Data Coverage |
North: 26.22 * South: 26.22 |
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West: 35.37 * East: 35.37 |
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Altitude: -1475 m |
Start Year: 5907 14C yr BP
* End Year: 3943 14C yr BP
Data: Please Cite Data Contributors!
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Summary: Partly laminated sediments were sampled from the brine-filled, anoxic Shaban Deep basin in the northern Red Sea. At about
4200 cal yr BP more than two millennia of anoxic sedimentation is replaced by a sub-oxic facies strongly suggesting the episodic
absence of the brine. At the same time stable oxygen isotopes from surface dwelling foraminifera show a sharp increase (within
less than 100 yr) pointing to a strong positive salinity anomaly at the sea surface. This major evaporation event significantly
enhanced the renewal of deep water and the subsequent ventilation of the small Shaban Deep basin. The timing and strength
of the reconstructed environmental changes around 4200 cal yr BP suggest that this event is the regional expression of a major
drought event, which is widely observed in the neighboring regions, and which strongly affected Middle East agricultural civilizations.
More Info on Paleoceanography Data |
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Parameters: delta O18 PDB (Globigerinoides ruber (white)); Bulimina marginata abundance; Radiocarbon ages; Manganese, counts per second (measured by scanning XRF); Sea Surface Temperature from Uk'37; Gray scale of sediment (0-255); calendar years before 1950AD
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Complete XML Record: noaa-ocean-5585
(Last Revised: 2007-12-21 )
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| http://www.ncdc.noaa.gov/paleo/ |
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