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
Always quote citation above when using data! You can download the citation in several formats below.
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):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | AGE | Age | ka BP | Geocode | ||
| 2 | Gephyrocapsa, small | Gephyrocapsa small | % | Palumbo, Eliana | Counting, coccoliths | |
| 3 | Florisphaera profunda | F. profunda | % | Palumbo, Eliana | Counting, coccoliths | |
| 4 | Gephyrocapsa caribbeanica | G. caribbeanica | % | Palumbo, Eliana | Counting, coccoliths | |
| 5 | Nannofossils, reworked fossil | Nannos rew fossil | % | Palumbo, Eliana | Counting, coccoliths | |
| 6 | Gephyrocapsa oceanica | G. oceanica | % | Palumbo, Eliana | Counting, coccoliths | |
| 7 | Coccolithus pelagicus ssp. pelagicus | C. pelagicus ssp. pelagicus | % | Palumbo, Eliana | Counting, coccoliths | |
| 8 | Gephyrocapsa margereli | G. margereli | % | Palumbo, Eliana | Counting, coccoliths | |
| 9 | Coccolithus pelagicus ssp. azorinus | C. pelagicus ssp. azorinus | % | Palumbo, Eliana | Counting, coccoliths | |
| 10 | Nannofossils, warm water taxa | Nannos warm | % | Palumbo, Eliana | Counting, coccoliths | |
| 11 | Dissolution index | DX | Palumbo, Eliana | Calculated | DI = small Gephyrocapsa/(small Gephyrocapsa + C. leptoporus) | |
| 12 | Coccoliths | Cocco | 106 #/g | Palumbo, Eliana | Calculated | |
| 13 | Gephyrocapsa caribbeanica | G. caribbeanica | 106 #/g | Palumbo, Eliana | Calculated | |
| 14 | Accumulation rate, Gephyrocapsa, small | Gephyrocapsa small acc rate | 106 #/cm2/ka | Palumbo, Eliana | Calculated | |
| 15 | Accumulation rate, nannofossils | Acc rate nannos | 106 #/cm2/ka | Palumbo, Eliana | Calculated |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
3064 data points
Download Data
View dataset as HTML (shows only first 2000 rows)