Dissolved Hafnium and Neodymium data measured on water samples during METEOR cruise M84/5 in the Bay of Biscay ...

• Main Authors: Dausmann, Veit, Frank, Martin, Zieringer, Moritz
• Format: Dataset
• Language: English
• Published: PANGAEA 2019
• Subjects: Event label; Date/Time of event; Latitude of event; Longitude of event; Elevation of event; Area/locality; DEPTH, water; Volume; Hafnium-176/Hafnium-177; Hafnium-176/Hafnium-177, standard deviation; ε-Hafnium; ε-Hafnium, standard deviation; ε-Neodymium; ε-Neodymium, standard deviation; Hafnium, dissolved; Neodymium, dissolved; Temperature, water; Salinity; CTD/Rosette; Membrane pump; M84/5; Meteor 1986; North Atlantic
• Online Access: https://dx.doi.org/10.1594/pangaea.902808; https://doi.pangaea.de/10.1594/PANGAEA.902808

We present dissolved neodymium and hafnium concentrations and radiogenic isotope compositions of surface and deep-water masses from the Bay of Biscay. Neodymium isotope signatures in surface waters of the Bay of Biscay are dominated by local weathering inputs from the surrounding continental margin. Subsurface Eastern North Atlantic Central Water (ENACW) shows a distinct Nd isotope signature (εNd≅‑12.0) at the southwestern-most station and is significantly diluted by mixing with more radiogenic waters on its way north along the European margin. Furthermore, the Nd isotope data clearly show a declining fraction of Mediterranean Outflow Water (MOW) at intermediate depths on its way north indicating that only 40% to 60% of MOW still present in the mixture at the Galician margin arrive at the stations further north in the Bay of Biscay. A potentially seasonal variability of the flow path of MOW is identified when comparing the results of the Nd isotope compositions and salinity data of this study with those of ... : Supplement to: Dausmann, Veit; Frank, Martin; Zieringer, Moritz (2020): Water mass mixing versus local weathering inputs along the Bay of Biscay: Evidence from dissolved hafnium and neodymium isotopes. Marine Chemistry, 224, 103844 ...