Contrasting late-glacial paleoceanographic evolution between the upper and lower continental slope of the western South Atlantic ...

• Main Authors: Luz, Leticia G., Santos, Thiago P., Eglinton, Timothy I., Montluçon, Daniel, Ausin, Blanca, Haghipour, Negar, Sousa, Silvia M., Nagai, Renata H., Carreira, Renato S.
• Format: Article in Journal/Newspaper
• Language: English
• Published: ETH Zurich 2020
• Subjects: Planktonic foraminifera; South Atlantic Ocean
• Online Access: https://dx.doi.org/10.3929/ethz-b-000429992; http://hdl.handle.net/20.500.11850/429992

The number of sedimentary records collected along the Brazilian continental margin has increased significantly in recent years, but relatively few are located in shallow waters and register paleoceanographic processes in the outer shelf–middle slope prior to 10–15 ka. For instance, the northward flow up to 23–24∘ S of cold and fresh shelf waters sourced from the Subantarctic region is an important feature of current hydrodynamics in the subtropical western South Atlantic Ocean, and yet limited information is available for the long-term changes of this system. Herein, we considered a suite of organic and inorganic proxies – alkenones-derived sea surface temperature (SST), δD-alkenones, δ18O of planktonic foraminifera, and ice-volume free seawater δ18OIVF−SW – in sediment from two cores (RJ-1501 and RJ-1502) collected off the Rio de Janeiro Shelf (SE Brazilian continental shelf) to shed light on SST patterns and relative salinity variations since the end of the last glacial cycle in the region and the ... : Climate of the Past, 16 (4) ...