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Palumbo, Eliana; Flores, José-Abel; Perugia, Carmen; Petrillo, Zaccaria; Voelker, Antje H L; Amore, Filomena Ornella (2013): Millennial scale coccolithophore paleoproductivity and surface water changes between 445 and 360 ka (Marine Isotope Stages 12/11) in the Northeast Atlantic [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.833636, Supplement to: Palumbo, E et al. (2013): Millennial scale coccolithophore paleoproductivity and surface water changes between 445 and 360ka (Marine Isotope Stages 12/11) in the Northeast Atlantic. Palaeogeography, Palaeoclimatology, Palaeoecology, 383-384, 27-41, https://doi.org/10.1016/j.palaeo.2013.04.024

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Abstract:
A high resolution coccolithophore study was carried out in order to improve the understanding of the paleoceanographic evolution and changes in paleoproductivity occurring off the Iberian Margin (IM) between 445 and 360 ka, i.e. during late Marine Isotope Stage 12 to 11. Coccolithophore assemblages allowed reconstructing surface water changes characterized by millennial-scale oscillations (~1.5 kyr cycles) involving Portugal or Iberian Poleward Currents (PC and IPC) prevalence. Changes in paleoproductivity, possibly related to the upwelling of Eastern North Atlantic Central Waters (ENACW) - of sub-tropical (ENACWst) or sub-polar origin (ENACWsp) - were also recognized. This study also permitted detecting abrupt events (stadial/interstadial-type oscillations) and revealed that changes in paleoproductivity are related to opposite dynamics during glacial and interglacial stages, with the reversed setting being established during the deglaciation. Furthermore, a possible control of half and fourth precessional cycle components, on the occurrence of abrupt changes within the assemblages' structure, during the deglaciation, is proposed on the basis of wavelet analysis results applied to selected taxa.
Coverage:
Latitude: 39.036700 * Longitude: -10.660500
Minimum Elevation: -1865.0 m * Maximum Elevation: -1865.0 m
Event(s):
MD03-2699 * Latitude: 39.036700 * Longitude: -10.660500 * Elevation: -1865.0 m * Recovery: 26.56 m * Location: Iberian slope * Campaign: MD134 (PICABIA) * Basis: Marion Dufresne (1995) * Method/Device: Calypso Corer (CALYPSO)
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
AGEAgeka BPGeocode
Gephyrocapsa, smallGephyrocapsa small%Palumbo, ElianaCounting, coccoliths
Florisphaera profundaF. profunda%Palumbo, ElianaCounting, coccoliths
Gephyrocapsa caribbeanicaG. caribbeanica%Palumbo, ElianaCounting, coccoliths
Nannofossils, reworked fossilNannos rew fossil%Palumbo, ElianaCounting, coccoliths
Gephyrocapsa oceanicaG. oceanica%Palumbo, ElianaCounting, coccoliths
Coccolithus pelagicus ssp. pelagicusC. pelagicus ssp. pelagicus%Palumbo, ElianaCounting, coccoliths
Gephyrocapsa margereliG. margereli%Palumbo, ElianaCounting, coccoliths
Coccolithus pelagicus ssp. azorinusC. pelagicus ssp. azorinus%Palumbo, ElianaCounting, coccoliths
10 Nannofossils, warm water taxaNannos warm%Palumbo, ElianaCounting, coccoliths
11 Dissolution indexDXPalumbo, ElianaCalculatedDI = small Gephyrocapsa/(small Gephyrocapsa + C. leptoporus)
12 CoccolithsCocco106 #/gPalumbo, ElianaCalculated
13 Gephyrocapsa caribbeanicaG. caribbeanica106 #/gPalumbo, ElianaCalculated
14 Accumulation rate, Gephyrocapsa, smallGephyrocapsa small acc rate106 #/cm2/kaPalumbo, ElianaCalculated
15 Accumulation rate, nannofossilsAcc rate nannos106 #/cm2/kaPalumbo, ElianaCalculated
Size:
3064 data points

Data

Download dataset as tab-delimited text — use the following character encoding:


Age [ka BP]

Gephyrocapsa small [%]

F. profunda [%]

G. caribbeanica [%]

Nannos rew fossil [%]

G. oceanica [%]

C. pelagicus ssp. pelagicus [%]

G. margereli [%]

C. pelagicus ssp. azorinus [%]
10 
Nannos warm [%]
11 
DX
12 
Cocco [106 #/g]
13 
G. caribbeanica [106 #/g]
14 
Gephyrocapsa small acc rate [106 #/cm2/ka]
15 
Acc rate nannos [106 #/cm2/ka]
360.4716.080.0073.620.005.780.001.510.000.500.8969365798
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