Planktonic foraminifera and paleotemperatures from sediment core GL-1090: deglacial and interglacial sections ...

• Main Authors: Lessa, Douglas Villela de Oliveira, Santos, Thiago Pereira dos, Venancio, Igor Martins, Albuquerque, Ana Luiza Spadano
• Format: Dataset
• Language: English
• Published: PANGAEA 2017
• Subjects: DEPTH, sediment/rock; AGE; Orbulina universa; Globigerinoides conglobatus; Globigerinoides ruber pink; Globigerinoides ruber white; Globoturborotalita tenella; Trilobatus sacculifer; Sphaeroidinella dehiscens; Globigerinella siphonifera; Globigerinella calida; Globigerina bulloides; Globigerina falconensis; Beella digitata; Globoturborotalita rubescens; Turborotalita humilis; Turborotalita quinqueloba; Neogloboquadrina pachyderma; Neogloboquadrina incompta; Neogloboquadrina dutertrei; Pulleniatina obliquiloculata; Globorotalia inflata; Globorotalia truncatulinoides sinistral; Globorotalia truncatulinoides dextral; Globorotalia crassaformis; Globorotalia hirsuta; Globorotalia scitula; Globorotalia menardii; Globorotalia tumida; Candeina nitida; Globigerinita glutinata; Globigerinita uvula; Foraminifera, planktic, other; Ratio; Temperature, calculated; Counting >150 µm fraction; Reconstructed; Planktonic foraminifera
• Online Access: https://dx.doi.org/10.1594/pangaea.881551; https://doi.pangaea.de/10.1594/PANGAEA.881551

Paleoceanographic reconstructions in upwelling regions can provide relevant information about changes in primary productivity, ocean-atmosphere interactions and the carbon budget. Here, we assessed new data on planktonic foraminifera from a sediment core located near to coastal upwelling zones along the Brazilian coast. Our new data was combined with previous records to reveal the state of upwelling systems along the western South Atlantic margin throughout the last two deglacial and interglacial periods sensu lato. Despite the contemporary oligotrophic scenario of the Santos Basin, a remarkably high relative abundance of Globigerina bulloides and low temperatures at a depth of 100 m indicated upwelling conditions similar to current shelf upwelling zones from 130 to 90 kyr BP. Comparing these results with previous studies, we argue that Brazilian shelf upwelling zones expanded offshore between 20 and 28°S. We develop two conceptual scenarios to characterize the system: (1) during Marine Isotopic Stage (MIS ... : Supplement to: Lessa, Douglas Villela de Oliveira; Santos, Thiago Pereira dos; Venancio, Igor Martins; Albuquerque, Ana Luiza Spadano (2017): Offshore expansion of the Brazilian coastal upwelling zones during Marine Isotope Stage 5. Global and Planetary Change, 158, 13-20 ...