Paleoclimatic reconstructions during Marine Isotope Stage (MIS) 43 to late MIS 49 (1.35-1.47 Ma) at IODP Site 339-U1387 in the Gulf of Cadiz based on nanno- and microfossil and lipid biomarker data
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| Autores principales: | , , , , |
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| Formato: | Dataset Open Access |
| Lenguaje: | en |
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PANGAEA
2025
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| _version_ | 1867170480465641472 |
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| author | Marino, Maria Trotta, Samanta Duque-Castaño, Mónica Rodrigues, Teresa Voelker, Antje H L |
| author_facet | Marino, Maria Trotta, Samanta Duque-Castaño, Mónica Rodrigues, Teresa Voelker, Antje H L |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | A high-resolution dataset is provided on marine and terrestrial biomarkers, alkenone-derived sea surface temperature (SST), and calcareous plankton key taxa in temporally well constrained, high resolution benthic and planktonic oxygen isotope records at Integrated Ocean Drilling Program site U1387 in the Gulf of Cadiz. The investigated time interval encompasses the Early Pleistocene marine isotope stages (MIS) late 49 to MIS 43. The aim is to evidence millennial climate variability during glacial phases of the "41 kyr world" and understand the impact of North Atlantic climate dynamics on the southern Portuguese margin. Quantitative analyses on coccolithophore assemblages were performed at the Dipartimento di Scienze della Terra e Geoambientali, Bari University (Italy), using a polarized light microscope at 1000 X magnification, and abundances were determined by counting at least 500 coccoliths of all sizes. Abundances of taxa were expressed as percentage. Total coccolith abundances were expressed as n°/g of sediment. Reworked coccoliths or nannoliths plus lithics (>10 micron) have been counted separately during the analysis. Nannofossil dissolution index (DI) has been calculated as follows: small gephyrocapsids/(small gephyrocapsids + Calcidiscus leptoporus). The extraction of marine and terrestrial lipid biomarkers was performed in the biogeochemistry lab of the Instituto Português do Mar e da Atmosfera (IPMA). The sea surface temperature (SST) was derived from the U₃₇ᴷ' values: SST [Uk'37 = (0.033*SST) + 0.044]. The percentage abundance of Neogloboquadrina pachyderma was obtained by a counting of the assemblages of the fraction >150 microns. The age model was obtained by tuning the site U1387 Globigerina bulloides δ18O record (Voelker, 2025) to the high-resolution G. bulloides δ18O record of IODP site U1385 on its LR04-related chronology. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_986646 |
| institution | PANGAEA |
| language | en |
| publishDate | 2025 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Paleoclimatic reconstructions during Marine Isotope Stage (MIS) 43 to late MIS 49 (1.35-1.47 Ma) at IODP Site 339-U1387 in the Gulf of Cadiz based on nanno- and microfossil and lipid biomarker data Marino, Maria Trotta, Samanta Duque-Castaño, Mónica Rodrigues, Teresa Voelker, Antje H L Biomarkers; Calcareous nannofossils; Integrated Ocean Drilling Program / International Ocean Discovery Program; IODP; Planktonic foraminifera A high-resolution dataset is provided on marine and terrestrial biomarkers, alkenone-derived sea surface temperature (SST), and calcareous plankton key taxa in temporally well constrained, high resolution benthic and planktonic oxygen isotope records at Integrated Ocean Drilling Program site U1387 in the Gulf of Cadiz. The investigated time interval encompasses the Early Pleistocene marine isotope stages (MIS) late 49 to MIS 43. The aim is to evidence millennial climate variability during glacial phases of the "41 kyr world" and understand the impact of North Atlantic climate dynamics on the southern Portuguese margin. Quantitative analyses on coccolithophore assemblages were performed at the Dipartimento di Scienze della Terra e Geoambientali, Bari University (Italy), using a polarized light microscope at 1000 X magnification, and abundances were determined by counting at least 500 coccoliths of all sizes. Abundances of taxa were expressed as percentage. Total coccolith abundances were expressed as n°/g of sediment. Reworked coccoliths or nannoliths plus lithics (>10 micron) have been counted separately during the analysis. Nannofossil dissolution index (DI) has been calculated as follows: small gephyrocapsids/(small gephyrocapsids + Calcidiscus leptoporus). The extraction of marine and terrestrial lipid biomarkers was performed in the biogeochemistry lab of the Instituto Português do Mar e da Atmosfera (IPMA). The sea surface temperature (SST) was derived from the U₃₇ᴷ' values: SST [Uk'37 = (0.033*SST) + 0.044]. The percentage abundance of Neogloboquadrina pachyderma was obtained by a counting of the assemblages of the fraction >150 microns. The age model was obtained by tuning the site U1387 Globigerina bulloides δ18O record (Voelker, 2025) to the high-resolution G. bulloides δ18O record of IODP site U1385 on its LR04-related chronology. |
| title | Paleoclimatic reconstructions during Marine Isotope Stage (MIS) 43 to late MIS 49 (1.35-1.47 Ma) at IODP Site 339-U1387 in the Gulf of Cadiz based on nanno- and microfossil and lipid biomarker data |
| topic | Biomarkers; Calcareous nannofossils; Integrated Ocean Drilling Program / International Ocean Discovery Program; IODP; Planktonic foraminifera |
| url | https://doi.org/10.1594/PANGAEA.986646 |