v4.1.0 released July 2025 - The SOCAT recalculation update + vectorisation. This release updates the recalculation of the SOCAT functions to be more flexible on the temperature datasets used, and the spatial and temporal resolution of the datasets (and incorporates changes made within the production of the recalculated SOCAT datasets). The approach also updates the temperature sensitivities that can be used to transform SOCAT fCO2sw to different temperature, and incorporates pyCO2sys. pyCO2sys in now a dependency of FluxEngine. Thanks to nguyen-vu-son (and the CO2COAST project), FluxEngine is now vectorised and uses netCDF4 for the saving. Verification runs were all successful, and the University of Exeter Global Carbon Budget submission (UExP-FNN-U) was recalculated with FE 4.1.0 finding differences in the 4-6 decimal place on individual fluxes, and when integrated differences around 0.001-0.01 Pg C yr-1 on the integrated ocean sink (compared to FE 4.0.9.1).