Simulation Results from Multi-decadal Satellite Gravity Simulations on Recoverability of Climate Trends in Next Generation Gravity Missions (NGGMs)

The simulation results are supplementary material to Schlaak et al. (in prep.) . The simulations are based on a modeled time series of global changes in soil moisture and snow coverage. The corresponding mass transport signal is obtained from future climate projections until the year 2100 following the shared socio-economic pathway scenario 5-8.5. For different mission concepts, including in-line single-pair missions and a Bender double-pair mission, the recoverability of a time variable mass signal is the time-variable signal is represented by the climate signal in terms of TWS. Here, the Geophysical Fluid Dynamics Laboratory (GFDL) model (H. Guo et al., 2018) is used as it has the best mean match compared with GRACE data and the Coupled Model Intercomparison Project Phase 6 (CMIP6) (L. Jensen et al., 2020)., considering realistic noise assumptions, simulated over several decades. The simulation results for linear trend and annual amplitudes are given in spherical harmonic (SH) coefficients for different simulation intervals considering GRACE-like or NGGM instrument accuracy.