Data-assimilating ocean thorium cycle model output associated with results paper Xu & Weber, 2025

Here we present output from the data-assimilating ocean thorium cycle model published by Xu and Weber (2025) in Global Biogeochemical Cycles (https://doi.org/10.1029/2024GB008485). The model predicts the oceanic distributions of thorium-230 and thorium-232 by simulating inputs from radiogenic sources and lithogenic sources (dust and sediment dissolution), and internal cycling by scavenging onto a range of particle types. The model assimilates data from the GEOTRACES IDP2021 archive to optimize uncertain parameters. Full code for the model and all input fields needed to run it can be accessed at the Zenodo repository (https://doi.org/10.5281/zenodo.10139433). This file contains the 3-dimensional thorium-230 and 232 fields from the fully-optimized model and the two-dimensional source fields for thorium-232 inputs to the ocean from dust and sediments. A matlab code is also provided to read the model output and plot the model thorium-232 budget to replicate a figure from Xu and Weber (2025).