Last interglacial and penultimate glacial sea surface temperature anomalies for the region south of 40°S, resampled to 2000 year resolution ...

• Main Authors: Chandler, David M, Langebroek, Petra M
• Format: Dataset
• Language: English
• Published: PANGAEA 2021
• Subjects: Alkenone; Diatom assemblage; Eemian; foraminiferal assemblages; Interglacial; Last Interglacial; marine isotope stage 5; marine isotope stage 6; Marine Sediment Core; Mg/Ca; Penultimate Glacial Maximum; proxy; Sea surface temperature; Southern Ocean; Event label; Site; Reference/source; Uniform resource locator/link to reference; Season; Proxy; Latitude of event; Longitude of event; AGE; Sea surface temperature, anomaly; Composite Core; Box corer; Gravity corer; Core; Gravity corer Kiel type; Piston corer; Giant piston corer Calypso; Calypso Corer; Calypso Corer II; Piston corer BGR type; Leg90; Leg177; Leg181; SO102/1; MD125; MD128; MD152; MD38; APSARA4; MD106; ANT-XXVI/2; ANT-VIII/3; ANT-IX/4; ANT-XI/2; RC11; Chandler
• Online Access: https://dx.doi.org/10.1594/pangaea.938620; https://doi.pangaea.de/10.1594/PANGAEA.938620

Southern Ocean marine sediments provide an important archive of Quaternary glacial-interglacial climate changes. Sea surface temperature (SST) reconstructions in the Southern Ocean depend exclusively on the fossils or geochemical signatures of planktic organisms, but the strengths of these SST proxies remain poorly quantified in this region. To improve confidence in Southern Ocean paleoclimate reconstructions, we first evaluated the reliability of SST proxies employed at Quaternary glacial-interglacial time scales, focusing on three key potential problems: advection/dispersion, seasonality, and non-thermal influences. On that basis, we selected foraminifera assemblages, long-chain alkenones (UK'37 index), diatom assemblages, and the Globigerina bulloides Mg/Ca ratio as the most reliable SST proxies in the Southern Ocean. We also revised calibrations where appropriate, using core-top sediment databases. Overall, Southern Ocean SST reconstructions using these recommended proxies and calibrations should be ... : This dataset contains individual SST records for the region south of 40°S, resampled to 2000 year resolution following Chandler and Langebroek (QSR, in review). Time slices without a temperature within +/-1000 years are assigned empty rows. Age models are based on benthic d18O where possible, with planktic d18O as a second choice. d18O is aligned with the respective regional stack (Lisiecki and Stern, 2016). Records aligned by other methods (for example, aligning by SST), are not included.Temperatures based on alkenones were calculated using annual SST (°C) = 30.3*(UK'37) - 1.30 or summer SST (°C) = 29.7*(UK'37) + 0.30. The former is the Prahl et al. (1988) calibration; the latter a revised calibration (Chandler and Langebroek, QSR, in review).Temperatures based on G. bulloides Mg/Ca were calculated using annual SST (°C) = 13.0*ln(1.23*Mg/Ca), based on a revised calibration (Chandler and Langebroek, QSR, in review).Temperatures based on diatom assemblages were taken as published by the original ...