1. ABOUT THE DATASET ----------------------------------------------------- Dataset for the thesis 'Modelling neodymium isotopes to investigate the marine neodymium cycle' Suzanne Robinson School of Earth and Environment, University of Leeds August 2022 Description: Supplementary files for adding neodymium isotopes (143Nd and 144Nd) to the ocean component of the FAMOUS General Circulation Model. Dataset includes: data tables containing (1) the seawater rare earth element (REE) compilation used to validate the Nd isotope scheme, and (2) all parameter values for the simulations forming the optimisation of the Nd isotope scheme, alongside all additional (i.e., historical) modification files (that are required on top of the FAMOUS base code to run the simulations described in this thesis), simulation files, and scripts for the scheme optimisation. Cite as: (Robinson, 2022): Dataset for the thesis 'Modelling neodymium isotopes to investigate the marine neodymium cycle. University of Leeds. [Dataset] https://doi.org/10.5518/1182 Contact: ee14s2r@leeds.ac.uk 2. TERMS OF USE ------------------------------------------------ This dataset is licensed under a Creative Commons Attribution 4.0 International Licence: https://creativecommons.org/licenses/by/4.0/. 3. PROJECT AND FUNDING INFORMATION ------------------------------------------------- Funding organisation: Natural Environment Research Council (NERC) SPHERES Doctoral Training Partnership Grant no.: NE/L002574/1 4. CONTENTS ------------------------------------------------------------------ - seawater_REE_database.xlsx ------------------------------------------------------------------ Observational data used to validate the Nd isotope scheme development and optimisation in FAMOUS GCM. Measurements are from the seawater REE compilation by Osborne et al. (2017, 2015), augmented with more recent measurements including data in the GEOTRACES Intermediate Data Product 2021 (GEOTRACES Intermediate Data Product Group, 2021) from GEOTRACES cruises (GA02, GA08, GP12, GN02, GN03 and GIPY05). ------------------------------------------------------------------ - standard_famous_mods.zip ------------------------------------------------------------------ Zip file containing all standard FAMOUS GCM modification files. ------------------------------------------------------------------ - chapter3_simulation_files.zip ------------------------------------------------------------------ Zip files containing all simulation files needed to run the simulations presented in Chapter 3 of the thesis: Control candidate simulations for new FAMOUS reference - XPDAA control simulation (0-5,000 years) - XPDAB control candidate simulation (0-5,000 years) - XPDAC control candidate simulation (0-5,000 years) - XPDEA control candidate simulation (0-5,000 years) Reversible scavenging efficiency ([Nd]p/[Nd]d) sensitivity simulations - XPDAI [Nd]p/[Nd]d=0.001 (0-9,000 years) - XPDAD [Nd]p/[Nd]d=0.002 (0-9,000 years) - XPDAH [Nd]p/[Nd]d=0.003 (0-9,000 years) - XPDAE [Nd]p/[Nd]d=0.004 (0-9,000 years) - XPDAF [Nd]p/[Nd]d=0.005 (0-9,000 years) - XPDAG [Nd]p/[Nd]d=0.006 (0-9,000 years) Total Nd source from sediment (fsed) sensitivity simulations - XPDAL fsed =1.5 × 109 g yr-1 (0-9,000 years) - XPDAM fsed =3.0 × 109 g yr-1 (0-9,000 years) - XPDAH fsed =4.5 × 109 g yr-1 (0-9,000 years) - XPDAN fsed =6.0 × 109 g yr-1 (0-9,000 years) ------------------------------------------------------------------ - ND ISOTOPE SCHEME OPTIMISATION SCRIPTS (/nd_optimisation_scripts/) ------------------------------------------------------------------ Contains the R scripts (.R files) used to calculate the parameter values for each ensemble wave of simulations in the optimisation of the Nd isotope scheme in FAMOUS GCM _extendedLHC.R (function for k-extended LHC sampling design) 01_wave1_design.R (script to predict parameter values for wave 1 of simulations) 02_wave2_design.R (script to predict parameter values for wave 2 of simulations) 03_choose_ctrl.R (script to predict the parameter values for the optimised Nd scheme in FAMOUS) /data/ (contains .csv files with the accompanying data required to run R scripts) ------------------------------------------------------------------ - nd_optimisation_params.xlsx ------------------------------------------------------------------ Parameter values and the resulting marine Nd inventory (Nd(I)) and residence time (τNd) for all the simulations forming the optimisation of the Nd isotope scheme in FAMOUS GCM (Sec 4.2.2, Chapter 4 of thesis). Note here that scaling the riverine source parameter (αriver) directly changes the total riverine source (friver) ------------------------------------------------------------------ - chapter4_simulation_files.zip ------------------------------------------------------------------ Zip files containing all simulation files needed to run the simulations presented in Chapter 4 of the thesis: Training set simulations - all simulations from Chapter 3 - XPDAU (0-9,000 years) - XPDAV (0-9,000 years) Simulations from Wave 1 of multi-ensemble - XPGTA (0-9,000 years) - XPGTB (0-9,000 years) - XPGTC (0-9,000 years) - XPGTD (0-9,000 years) - XPGTE (0-9,000 years) - XPGTF (0-9,000 years) - XPGTG (0-9,000 years) - XPGTH (0-9,000 years) Simulations from Wave 2 of multi-ensemble - XPHJA (0-9,000 years) - XPHJB (0-9,000 years) - XPHJC (0-9,000 years) - XPHJD (0-9,000 years) - XPHJE (0-9,000 years) - XPHJF (0-9,000 years) - XPHJG (0-9,000 years) - XPHJAH (0-9,000 years) - XPHJI (0-9,000 years) - XPHJJ (0-9,000 years) - XPHJK (0-9,000 years) - XPHJL (0-9,000 years) - XPHJM (0-9,000 years) - XPHJN (0-9,000 years) - XPHJO (0-9,000 years) Reference simulations from the Nd isotope scheme optimisation - XPIAB reference (‘REF’) simulation (0-6,000 years) - XPIAD Nd concentration reference (‘REF_CONC1’) simulation (0-6,000 years) - XPHJF Nd concentration reference; best performing from parameter analysis (‘REF_CONC2’) simulation (0-6,000 years) - XPIAC Nd isotope reference (‘REF_IC’) simulation (0-6,000 years) Seafloor sediment Nd isotope distribution sensitivity simulations - XPIAG reference (‘REF_SED2’) simulation (0-6,000 years) - XPIAH reference (‘REF_SED3’) simulation (0-6,000 years) Continental margin constrained benthic flux sensitivity simulation - XPIAQ reference (‘REF_SED3_MG’) simulation (0-6,000 years)