| PALEOCEANOGRAPHY |
Southern Ocean Elemental Data
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Latimer, J.C., and G.M. Filippelli. 2001. Terrigenous input and paleoproductivity in the Southern Ocean. Paleoceanography
16(6):627-643.
| Data Coverage |
North: -44.88 * South: -53.88 |
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West: -4.93 * East: 106.52 |
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Altitude: -3863 m |
Start Year: 273881 14C yr BP
* End Year: 850 14C yr BP
Data: Please Cite Data Contributors!
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Summary: The geochemistry of several sites along the Polar Front Zone of the Southern Ocean revealed significant changes in terrigenous
input and productivity on glacial timescales. Our records indicate concentrations and fluxes of terrigenous elements (i.e.,
Fe, Al, and Ti) are low during interglacials and increase tenfold to twentyfold during glacials. Phosphorus accumulation,
reactive P concentrations, and P/Ti ratios exhibit similar trends as the terrigenous components, suggesting increased export
production during glacials. In all cores, elemental ratios remain relatively constant, indicating terrigenous sources at each
site have not likely varied over the past ~250 kyr. Iron accumulation rates for these sites are 10 times higher during glacials
than interglacials and exceed the estimated regional eolian fluxes by ~50 times. The source of this terrigenous material is
thus likely to be hemipelagic rather than direct eolian input or ice rafting, and we speculate Fe upwelled from this source
may have stimulated glacial productivity in the Southern Ocean.
More Info on Paleoceanography Data |
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Parameters: Sedimentation rate (cm/kyr); Iron (µmol/g); Titanium (µmol/g); Zinc (µmol/g); Cadmium (µmol/g); Phosphorus (µmol/g); Aluminum (µmol/g); Calcium (µmol/g); Barium (µmol/g); Strontium (µmol/g); Manganese (µmol/g); radiocarbon years before 1950AD
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Complete XML Record: noaa-ocean-2564
(Last Revised: 2007-12-21 )
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DOC/NOAA/NESDIS/NCDC (National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce )
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USA
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| http://www.ncdc.noaa.gov/paleo/ |
| E-mail: bruce.a.bauer@noaa.gov |
| E-mail: paleo@noaa.gov |
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