CHESS-SCAPE catchment-mean climate forcing and HBV-simulated discharge, states, and generating fluxes for Great Britain (RCP2.6/4.5/6.0/8.5, 1980–2080)

Catchment-mean CHESS-SCAPE climate forcing (daily precipitation, temperature, and FAO-56 Penman-Monteith potential evapotranspiration) and HBV-simulated discharge, internal storage states, and generating fluxes, for 671 CAMELS-GB v2 catchments across Great Britain, all four CHESS-SCAPE RCP scenarios (RCP2.6, 4.5, 6.0, 8.5) and ensemble members (01, 04, 06, 15), 1980–2080. Contents (8 zip archives, split by RCP and content type; and one folder of provenance code): - <rcp>_forcing.zip (4 archives): catchment-mean daily precipitation (pr), temperature (tas), and derived PET (pet), one CSV per ensemble member.- <rcp>_hbv_output.zip (4 archives): HBV-simulated discharge and internal states (SM, UZ, LZ, SP) and generating fluxes (Q0, Q1, Q2, melt), one CSV per ensemble member, produced with hbv-model v1.1.0 (https://doi.org/10.5281/zenodo.21860981).- code/: the JASMIN extraction pipeline (raster-to-catchment zonal averaging against CAMELS-GB v2 catchment boundaries) and the concatenation step that produces the combined per-variable CSVs above. Requires direct filesystem access to CEDA's archive and only runs on JASMIN; included as a record of provenance. Derived from CHESS-SCAPE (Robinson et al., 2023; NERC EDS Centre for Environmental Data Analysis, https://doi.org/10.5285/8194b416cbee482b89e0dfbe17c5786c) and CAMELS-GB v2 (Coxon et al., 2026; NERC EDS Environmental Information Data Centre, https://doi.org/10.5285/9a46d428-958f-4ac1-86eb-94eee70c0955), both released under the Open Government Licence v3.0. This dataset is released under CC-BY 4.0; the required attribution statement for the upstream CAMELS-GB v2 data is: "Contains data supplied by UK Centre for Ecology & Hydrology, British Geological Survey, Environment Agency, Natural Resources Wales and Scottish Environmental Protection Agency." Code (in code/) is licensed separately under the MIT License.