de Castro, Maria Júlia; Venancio, Igor Martins; Santos, Thiago; Lessa, Douglas Villela de Oliveira; Ballalai, João M; Albuquerque, Ana Luiza (2025): Planktonic foraminifera assemblages and sea surface temperature reconstruction of IODP Site 383-U1539 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.984574
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Published: 2025-08-28 • DOI registered: 2025-09-26
Abstract:
This dataset comprises planktonic foraminifera assemblages and sea surface temperature (SST) reconstructions generated using the Modern Analogue Technique (MAT). The record spans 0.5 to 1.3 Ma, covering intervals before, during, and after the Middle Pleistocene Transition (MPT). It includes the sample code, depth in meters CSF-A (core depth below seafloor, method A), interpolated age in million years (Ma), sea surface temperature (°C) with associated weighted standard deviation, as well as the relative abundances (%) of planktonic foraminifera species. Sediment was recovered by drilling during IODP Expedition 383 at Site U1539, located in the South Pacific sector of the Southern Ocean. Samples were washed through a 63 µm mesh size sieve and subsequently dried at approximately 50°C for 24 hours. Once dried, samples were sieved through a 250 µm mesh. Species-level identification was performed using a stereomicroscope. These assemblage data were used to reconstruct SSTs with the MAT, implemented in C2 Software (version 1.8.0), using the Squared Chord Distance dissimilarity coefficient and leave-one-out cross-validation. The resulting SST estimates were applied as a proxy to investigate the latitudinal migration of oceanic fronts-particularly the Polar Front-during the MPT, to assess the mechanisms driving these shifts and their impact on the central South Pacific. The use of foraminiferal assemblages as a proxy for palaeoceanographic changes follows Kucera (2007; https://doi.org/10.1016/S1572-5480(07)01011-1).
Keyword(s):
Related to:
de Castro, Maria Júlia; Venancio, Igor Martins; Santos, Thiago Pereira dos; Lessa, Douglas V O; Ballalai, João M; Albuquerque, Ana Luiza Spadano (2025): Migration of oceanic fronts in the Pacific Southern Ocean during the Mid-Pleistocene transition. Marine Micropaleontology, 200, 102501, https://doi.org/10.1016/j.marmicro.2025.102501
References:
Kucera, Michal (2007): Chapter Six Planktonic Foraminifera as Tracers of Past Oceanic Environments. In: Proxies in Late Cenozoic Paleoceanography, Developments in Marine Geology, 1, Elsevier, 213-262, https://doi.org/10.1016/S1572-5480(07)01011-1
Funding:
Coordenação de Aperfeicoamento de Pessoal de Nível Superior (CAPES), grant/award no. 8881.712022/2022-1
Coordenação de Aperfeicoamento de Pessoal de Nível Superior (CAPES), grant/award no. 88881.512929/2020-01
Coordenação de Aperfeicoamento de Pessoal de Nível Superior (CAPES), grant/award no. 88887.906110/2023-00
Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro (FAPERJ), grant/award no. 260003/001327/2025
Coverage:
Median Latitude: -56.151133 * Median Longitude: -115.134000 * South-bound Latitude: -56.151200 * West-bound Longitude: -115.134100 * North-bound Latitude: -56.151000 * East-bound Longitude: -115.133800
Date/Time Start: 2019-05-31T15:15:00 * Date/Time End: 2019-06-07T03:30:00
Minimum DEPTH, sediment/rock: 86.93 m * Maximum DEPTH, sediment/rock: 237.52 m
Event(s):
383-U1539A * Latitude: -56.151000 * Longitude: -115.134100 * Date/Time Start: 2019-05-31T15:15:00 * Date/Time End: 2019-06-02T05:25:00 * Elevation: -4071.1 m * Number of cores: 12 * Penetration: 107.6 m * Recovery: 97.35 % * Campaign: EXP383 * Basis: Joides Resolution * Method/Device: Advanced piston corer
383-U1539C * Latitude: -56.151200 * Longitude: -115.133800 * Date/Time Start: 2019-06-03T13:00:00 * Date/Time End: 2019-06-05T15:30:00 * Elevation: -4081.0 m * Number of cores: 32 * Penetration: 268.1 m * Recovery: 92.32 % * Campaign: EXP383 * Basis: Joides Resolution * Method/Device: Core drilling (CDRILL) * Comment: APC cores (N): 26, HLAPC cores (N): 6
383-U1539D * Latitude: -56.151200 * Longitude: -115.134100 * Date/Time Start: 2019-06-05T15:30:00 * Date/Time End: 2019-06-07T03:30:00 * Elevation: -4081.0 m * Number of cores: 14 * Penetration: 198 m * Recovery: 99.13 % * Campaign: EXP383 * Basis: Joides Resolution * Method/Device: Advanced piston corer
Parameter(s):
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
2197 data points
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