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

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....

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Bibliographic Details
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
Description
Summary: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 ...

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