Simulating marine neodymium isotope distributions using Nd v1.0 coupled to the ocean component of the FAMOUS–MOSES1 climate model: sensitivities to reversible scavenging efficiency and benthic source distributions

The neodymium (Nd) isotopic composition of seawater is a widely used ocean circulation tracer. However, uncertainty in quantifying the global ocean Nd budget, particularly constraining elusive non-conservative processes, remains a major challenge. A substantial increase in modern seawater Nd measure...

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Bibliographic Details
Published in:Geoscientific Model Development 2023-02, Vol.16 (4), p.1231-1264
Main Authors: Robinson, Suzanne, Ivanovic, Ruza F, Gregoire, Lauren J, Tindall, Julia, van de Flierdt, Tina, Plancherel, Yves, Pöppelmeier, Frerk, Tachikawa, Kazuyo, Valdes, Paul J
Format: Article
Language:English
Subjects:
Atmospheric circulation
Benthos
Circulation
Climate models
Concentration gradient
Cycles
Detrital deposits
Dust
Fluctuations
General circulation models
Groundwater discharge
Hypotheses
Isotope composition
Isotopes
Magnetic alloys
Modelling
Neodymium
Neodymium isotopes
Ocean
Ocean circulation
Ocean currents
Ocean floor
Oceanic general circulation model
Oceanographic conditions
Oceans
Rivers
Scavenging
Sciences of the Universe
Sea-water
Seawater
Sediment
Sediments
Sensitivity analysis
Simulation
Tracers
Tracers (Biology)
Water circulation
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Summary:The neodymium (Nd) isotopic composition of seawater is a widely used ocean circulation tracer. However, uncertainty in quantifying the global ocean Nd budget, particularly constraining elusive non-conservative processes, remains a major challenge. A substantial increase in modern seawater Nd measurements from the GEOTRACES programme, coupled with recent hypotheses that a seafloor-wide benthic Nd flux to the ocean may govern global Nd isotope distributions (ε.sub.Nd ), presents an opportunity to develop a new scheme specifically designed to test these paradigms. Here, we present the implementation of Nd isotopes (.sup.143 Nd and .sup.144 Nd) into the ocean component of the FAMOUS coupled atmosphere-ocean general circulation model (Nd v1.0), a tool which can be widely used for simulating complex feedbacks between different Earth system processes on decadal to multi-millennial timescales.
ISSN:1991-9603
1991-959X
1991-962X
1991-9603
1991-962X
1991-959X
DOI:10.5194/gmd-16-1231-2023