Saavedra-Pellitero, Mariem; Flores, José-Abel; Lamy, Frank; Sierro, Francisco Javier; Cortina Guerra, Aleix (2011): Coccolithophore taxa and PCA factor analysis of ODP Site 1233. PANGAEA, https://doi.org/10.1594/PANGAEA.806605, Supplement to: Saavedra-Pellitero, M et al. (2011): Coccolithophore estimates of paleotemperature and paleoproductivity changes in the southeast Pacific over the past ~27 kyr. Paleoceanography, 26, PA1201, https://doi.org/10.1029/2009PA001824
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We provide high-resolution sea surface temperature (SST) and paleoproductivity data focusing on Termination 1. We describe a new method for estimating SSTs based on multivariate statistical analyses performed on modern coccolithophore census data, and we present the first downcore reconstructions derived from coccolithophore assemblages at Ocean Drilling Project (ODP) Site 1233 located offshore Chile. We compare our coccolithophore SST record to alkenone-based SSTs as well as SST reconstructions based on dinoflagellates and radiolaria. All reconstructions generally show a remarkable concordance. As in the alkenone SST record, the Last Glacial Maximum (LGM, 19-23 kyr B.P.) is not clearly defined in our SST reconstruction. After the onset of deglaciation, three major warming steps are recorded: from 18.6 to 18 kyr B.P. (~2.6°C), from 15.7 to 15.3 kyr B.P. (~2.5°C), and from 13 to 11.4 kyr B.P. (~3.4°C). Consistent with the other records from Site 1233 and Antarctic ice core records, we observed a clear Holocene Climatic Optimum (HCO) from ~8-12 kyr B.P. Combining the SST reconstruction with coccolith absolute abundances and accumulation rates, we show that colder temperatures during the LGM are linked to higher coccolithophore productivity offshore Chile and warmer SSTs during the HCO to lower coccolithophore productivity, with indications of weak coastal upwelling. We interpret our data in terms of latitudinal displacements of the Southern Westerlies and the northern margin of the Antarctic Circumpolar Current system over the deglaciation and the Holocene.
Latitude: -41.000080 * Longitude: -74.449860
Date/Time Start: 2002-04-12T00:00:00 * Date/Time End: 2002-04-12T00:00:00
202-1233 * Latitude: -41.000080 * Longitude: -74.449860 * Date/Time: 2002-04-12T00:00:00 * Elevation: -838.0 m * Penetration: 451.6 m * Recovery: 422.2 m * Location: South-East Pacific * Campaign: Leg202 * Basis: Joides Resolution * Device: Composite Core (COMPCORE) * Comment: cores; 411 m cored; 40.6 m drilled; 102.7 % recovery
Datasets listed in this Collection
- Saavedra-Pellitero, M; Flores, J-A; Lamy, F et al. (2011): (Figure 6k and 6l) Nannofossil accumulation rate and absolute abundances of coccoliths from ODP Site 1233. https://doi.org/10.1594/PANGAEA.806721
- Saavedra-Pellitero, M; Flores, J-A; Lamy, F et al. (2011): (Supplement 1) Most common taxa or groups of coccoliths from ODP Site 1233 (past dataset) covering the last 70 kyr. https://doi.org/10.1594/PANGAEA.806537
- Saavedra-Pellitero, M; Flores, J-A; Lamy, F et al. (2011): (Table 1) Factor scores obtained in the PCA factor analysis performed in the present-day data set (surface sediment samples) of ODP Site 1233. https://doi.org/10.1594/PANGAEA.806539
- Saavedra-Pellitero, M; Flores, J-A; Lamy, F et al. (2013): (Table 2) Correlation matrix obtained between the factors from the present data set and the selected environmental variables of ODP Site 1233. https://doi.org/10.1594/PANGAEA.806545
- Saavedra-Pellitero, M; Flores, J-A; Lamy, F et al. (2013): (Table 3) Factor scores obtained in the PCA factor analysis performed in the past data set of ODP Site 1233. https://doi.org/10.1594/PANGAEA.806580
- Saavedra-Pellitero, M; Flores, J-A; Lamy, F et al. (2011): (Table 4) Correlation matrix between present and past factors of ODP Site 1233. https://doi.org/10.1594/PANGAEA.806597
- Saavedra-Pellitero, M; Flores, J-A; Lamy, F et al. (2011): (Table 5) Correlation matrix between past factors and the SST alkenones of ODP Site 1233. https://doi.org/10.1594/PANGAEA.806604