Data and code for Contrasting controls on water availability and its cooling response in an idealised Himalayan snow–ice system

Extracted ERA5T and CMIP6 inputs, original numerical code, prescribed configurations, retained results, geographical inputs and reproduction instructions for controlled snow–ice water-availability experiments. The analyses distinguish reference water availability from its response to prescribed or climate-informed cooling. They do not estimate actual source melt, collapse probability or an event-specific anthropogenic contribution. Numerical reproduction includes archived budget verification, analytical tests, twelve representative complete trajectories and all fifteen article and supplementary figures. Third-party terms and source versions are retained in the archive. No unpublished station or rupture-boundary observations are included. Original research outputs and documentation are licensed under CC BY 4.0. Original custom code is licensed under MIT. Third-party exceptions and attribution requirements are specified in LICENSE_DATA.md.