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Rea, David K; Pisias, Nicklas G; Newberry, T (1991): Weight percentages and mass accumulation rates of biogenic components in sediment core RC11-210 (Table 1). PANGAEA,, Supplement to: Rea, DK et al. (1991): Late Pleistocene paleoclimatology of the central equatorial Pacific: flux patterns of biogenic sediments. Paleoceanography, 6(2), 227-244,

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High-resolution records of the concentration and mass accumulation rate (MAR, or flux) of biogenic sediments from core RC11-210 in the central equatorial Pacific are compared for the entire late Pleistocene. The fluxes of calcium carbonate and organic carbon correlate well. The opal flux pattern shows no direct correlation with the other two; rather, opal flux maxima correlate with slopes of (i.e. both precede and follow) the organic carbon and carbonate MAR peaks. Organic carbon and calcite therefore may both be better indicators of past productivity than opal, which is an indicator of transition at this location. We interpret the sequence low biogenic fluxes, high opal fluxes, high carbonate, carbon, and opal fluxes as representing the transition from low to high sea surface biological productivity. The phase relationships for eccentricity of the biogenic sedimentation records were compared to those of other climatic indications including the oxygen isotope record of ice volume, the ice core CO2 record, the Pacific delta13C record, the deep nutrient (Cd/Ca) record, and the eolian grain-size record of wind intensity. We find that starting from maximum ice volume (phase angle of 0°) the phase relationships of the 100,000-year periodicity show, in the first quadrant, maximum wind intensity (30°) and maximum calcite and carbon flux (45°) occurring first, followed by maximum opal flux (75°) and then maximum deep nutrients (95°). Minimum Pacific delta13C occurs at a phase angle of 155°, the maximum CO2 in the Vostok record and minimum ice volume is at 180°. Thus, in the eccentricity climate cycle, glacial conditions lead to stronger wind-driven circulation which enhances productivity which in turn results in enhanced oceanic and atmospheric carbon dioxide and minimum ice volume.
Latitude: 1.817000 * Longitude: -140.100000
Date/Time Start: 1967-09-08T00:00:00 * Date/Time End: 1967-09-08T00:00:00
Minimum DEPTH, sediment/rock: 0.06 m * Maximum DEPTH, sediment/rock: 14.00 m
RC11-210 * Latitude: 1.817000 * Longitude: -140.100000 * Date/Time: 1967-09-08T00:00:00 * Elevation: -4420.0 m * Recovery: 14.05 m * Campaign: RC11 (RC1112) * Basis: Robert Conrad * Method/Device: Piston corer (PC)
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1DEPTH, sediment/rockDepthmGeocode
2AGEAgeka BPGeocode
3Sedimentation rateSed ratecm/kaRea, David KCalculated
4Density, dry bulkDBDg/cm3Rea, David K
5Calcium carbonateCaCO3%Rea, David K
6Opal, biogenic silicabSiO2%Rea, David KOpal, extraktion (DeMaster & Cochran, 1982)
7Carbon, organic, totalTOC%Rea, David K
8Accumulation rate, calcium carbonateAcc rate CaCO3g/cm2/kaRea, David KCalculated
9Accumulation rate, opalAcc rate opalg/cm2/kaRea, David KCalculated
10Accumulation rate, total organic carbonAcc rate TOCg/cm2/kaRea, David KCalculated
1392 data points

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