10.1594/PANGAEA.996173Marino, MariaMariaMarino0000-0001-6239-0786University of Bari Aldo MoroRodrigues, TeresaTeresaRodrigues0000-0001-7811-7506Instituto Portugues do Mar e da Atmosfera: Lisboa, PortugalDuque-Castaño, MonicaMonicaDuque-Castaño0000-0001-8420-3080Algarve Centre of Marine SciencesTrotta, SamantaSamantaTrotta0000-0002-8495-034XUniversity of Bari Aldo MoroPANGAEA2026BiomarkersCalcareous nannofossilsPlanktonic foraminiferaEvent labelSample code/labelDEPTH, sediment/rockDepth, composite topDepth, composite, corrected, topAGECoccolithus pelagicus subsp. pelagicusCoccolithus spp.Helicosphaera spp.Syracosphaera spp.Rhabdosphaera spp.Reticulofenestra spp.Gephyrocapsa caribbeanicaCalcidiscus spp.Gephyrocapsa, largeFlorisphaera profundaGephyrocapsa, smallGephyrocapsa oceanicaNannofossils, warm water taxaCoccoliths, otherDissolution indexCoccoliths, reworkedCoccoliths, totalDrilling/drill rigDSDP/ODP/IODP sample designationIODP Depth Scale TerminologyAge model according to Lisiecki & Raymo (2005) [LR04]Quantitative analysisExp339Joides ResolutionIntegrated Ocean Drilling Program / International Ocean Discovery Program (IODP)Dataset10.1594/PANGAEA.98664610.1016/j.palaeo.2025.11304110.1594/PANGAEA.9866436480 data pointstext/tab-separated-valuesCreative Commons Attribution 4.0 InternationalA 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. 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. 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 mm) have been counted separately during the analysis. Nannofossil dissolution index (DI) has been calculated as follows: small gephyrocapsids/(small gephyrocapsids + Calcidiscus leptoporus).Version 2, 2026-07-22: Previous version doi:10.1594/PANGAEA.986648 contains errors in the ages younger than 1415 ka.-7.719013333333294-7.71879536.80523166666736.80541