Comparison of Vertical Surface Deformation Estimates Derived From Space-Based Gravimetry, Ground-Based GPS, and Model-Based Hydrologic Loading Over Snow-Dominated Watersheds in the United States

The NASA Catchment Land Surface Model (a.k.a. Catchment; Koster et al., 2000; Ducharne et al., 2000) was run on the 25-km Equal-Area Scalable Earth (EASE) grid using meteorological fields provided by the Modern Era Retrospective Analysis for Research Application version 2 product (MERRA-2) as boundary conditions. The netcdf file archived here was reprocessed from the binary output generated directly from Catchment simulations. Daily TWS anomaly estimates across the globe were converted into (approximately) monthly-averaged values based on the specific dates corresponding used in the generation of the GRACE TWS retrievals from January 2003 to March 2016. The time bounds used for calculating each monthly data can be acquired from https://earth.gsfc.nasa.gov/geo/data/grace-mascons. Following the data processing steps discussed in the paper, vertical displacement at each GPS station can be computed using this modeled TWS anomaly data.