UK'37, TEX86 and LDI indices, and temperature estimates for sediment core NAP 63-1 (South Brazil Bight) ...

• Main Authors: Dauner, Ana Lúcia Lindroth, Mollenhauer, Gesine, Bícego, Márcia Caruso, de Souza, Mihael Machado, Nagai, Renata Hanae, Figueira, Rubens César Lopes, Mahiques, Michel Michaelovitch, de Mello e Sousa, Silvia Helena, Martins, César Castro
• Format: Dataset
• Language: English
• Published: PANGAEA 2019
• Subjects: Holocene; LDI; Organic Geochemistry; Paleoceanography; Pleistocene; South Atlantic; TEX86; UK'37; DEPTH, sediment/rock; Depth, top/min; Depth, bottom/max; AGE; Alkenone, unsaturation index UK'37; Sea surface temperature, annual mean; Tetraether index of 86 carbon atoms; Tetraether index of 86 carbon atoms, high-temperature region; Long chain diol index; Piston corer; Gas chromatography - Flame Ionization Detection GC-FID; Calculated from UK'37 Müller et al, 1998; High Performance Liquid Chromatography HPLC-APCI-MS; Calculated from TEX86H Kim et al., 2012; Gas chromatography - Mass spectrometry GC-MS; Calculated after Rampen et al. 2012; AC07/02; Alpha-Crucis; Antarctic; Fid; Greenland; Rampen; Silvia; Antarc*; NADW
• Online Access: https://dx.doi.org/10.1594/pangaea.901238; https://doi.pangaea.de/10.1594/PANGAEA.901238

Millennial-scale oscillations are known to be important in the climatic evolution of the Atlantic basin, but which internal processes originates these oscillations are still uncertain. In this study, we investigated how the Greenland and Antarctic climates affect the SW Atlantic through basin-wide oceanographic features (such as the NADW formation and the Agulhas leakage). We reconstructed sea surface and subsurface temperatures (SST and subT) using three lipid-based biomarker proxies (UK'37, TEX86 and LDI indexes) from a sediment core (NAP 63-1) retrieved from the SW Atlantic slope (24.8°S, 44.3°W). This location permitted to evaluate the temperature oscillations of the Brazil Current without any terrigenous or upwelling-derived biases. Both TEX86-based and LDI-based estimates represent the mean annual SST, while the UK'37-based estimates represent the subT (around 30 m water depth). The periods with the most well-mixed water column were observed during intervals of cooling orbital trends due to the time ... : Supplement to: Dauner, Ana Lúcia Lindroth; Mollenhauer, Gesine; Bícego, Márcia Caruso; de Souza, Mihael Machado; Nagai, Renata Hanae; Figueira, Rubens César Lopes; Mahiques, Michel Michaelovitch; de Mello e Sousa, Silvia Helena; Martins, César Castro (2019): Multi-proxy reconstruction of sea surface and subsurface temperatures in the western South Atlantic over the last ∼75 kyr. Quaternary Science Reviews, 215, 22-34 ...