Groundwater Storage Changes Based on GRACE and ERA5 Data

This approach assumes that groundwater storage (ΔGW) can be computed by subtracting soil moisture (ΔSM), snow water equivalent (ΔSWE), surface water (ΔSWA), canopy water storage (ΔCWS) from total water storage (ΔTWS), as shown in Equation:

ΔGW= ΔTWS- ΔSM - ΔSWE- ΔSWA- ∆CWS

Data SOURCE The data retrieved from the GRACE/GRACE-FO RL06 Mascon solutions (Save et al. 2016; Save 2020) provided by the Center for Space Research (CSR) website: https://www2.csr.utexas.edu/grace/RL06_mascons.html

ERA5-Land dataset (Muñoz Sabater, 2019; Muñoz Sabater, 2021) website:https://cds.climate.copernicus.eu/cdsapp#!/dataset/reanalysis-era5-land-monthly-means?tab=overview