Particulate rare earth element behavior in the North Atlantic (GEOVIDE cruise) ...

• Main Authors: Lagarde, Marion, Lemaitre, Nolwenn, Planquette, Hélène, Grenier, Mélanie, Belhadj, Moustafa, Lherminier, Pascale, Jeandel, Catherine
• Format: Article in Journal/Newspaper
• Language: English
• Published: ETH Zurich 2020
• Subjects: North Atlantic
• Online Access: https://dx.doi.org/10.3929/ethz-b-000452645; http://hdl.handle.net/20.500.11850/452645

Particulate concentrations of the 14 Rare Earth Elements (PREE), yttrium, and 232-thorium were measured in 200 samples collected in the epipelagic (ca. 0–200 m) and mesopelagic (ca. 200–1500 m) zones of the North Atlantic during the GEOVIDE cruise (May/June 2014, R/V Pourquoi Pas?, GEOTRACES GA01), providing the most detailed snapshot of the PREE distribution in the North Atlantic so far. Concentrations of particulate cerium (PCe) varied between 0.2 and 16 pmol L−1, while particulate neodymium (PNd) concentrations ranged between 0.1 and 6.1 pmol L−1. Particulate ytterbium (PYb) concentrations ranged between 0.01 and 0.50 pmol L−1. In addition, this study showed that PREE distributions were also controlled by the biological production in the upper sunlit ocean and by remineralization processes in the mesopelagic area. Low surface concentrations combined with normalized PREE patterns displaying a negative Ce anomaly and HREE enrichments pointed to freshly formed biogenic particles imprinting the seawater ... : Biogeosciences, 17 (22) ...