Code underlying the publication: "Spatially varying contributions to subpolar North Atlantic overturning revealed by regional density-space volume budgets"

This dataset contains the documented Python workflow accompanying the manuscript “Regional density-space volume budgets reveal spatially varying contributions to subpolar North Atlantic overturning”. The workflow includes a command-line package that derives the GLORYS12 native-grid barotropic streamfunction and staircase control volumes, calculates density-binned transports and Walin surface-transformation budgets, validates numerical consistency, and produces manuscript Figures 1, 3–7 and 9 + Supplementary Figures S1–S4.

The archive includes the prepared GLORYS12 native horizontal-grid, vertical-grid and bathymetry stores required by the workflow, together with the OSNAP mooring geometry. The approximately 5-TB daily native-grid GLORYS12 archive for 1993–2024 is not redistributed; 'DATA.md' identifies the exact Mercator THREDDS collections, variables, spatial and temporal selection, and preparation conventions needed to reconstruct it. OSNAP inputs are documented using persistent identifiers and checksums. The Python implementation uses xarray, NumPy, SciPy, Dask, Matplotlib and related packages. Unless stated otherwise, quantities follow SI conventions.