Global Daily Terrestrial Water Storage variations product at 0.5° resolution from ISBA-CTRIP simulations based on ERA5-GPCC forcing from 1950 to 2023

This product provides global daily terrestrial water storage variations (dtws) at a resolution of 0.5 degree from 1950 to 2023. dtws is the sum of water on vegetation canopy, snow mass, soil moisture, river and groundwater variations. It is derived from an offline simulation conducted with the ISBA-CTRIP global land surface modeling system (Decharme et al. 2019) embedded in the SURFEX version 8 modeling platform. It was designed for use in large-scale hydrological applications, as well as in the the CNRM climate models that participate in CMIP6 but also in large scale hydrological applications. The model is driven by meteorological forcing data (temperature, precipitation, humidity, winds, etc) derived from the ERA5 global atmospheric reanalysis, but where montly precipitation is corrected to align with the GPPC observed precipitation product. GPCC Full Data Monthly Product Version 2022  at 0.5 degree resolution are used from 1950 to 2020. For the last three years (2021 to 2023), we used the GPCC Monitoring Product Version 2022, which is only available at 1 degree resolution, and then interpolated at 0.5 degree using a conservative remapping. This product is related to this global daily river discharge product.