High‐resolution CSR GRACE RL05 mascons

• DOI: 10.1002/2016jb013007
• Publication Date: 2016-09-23T13:19:03Z
• Authors: Himanshu Save; Srinivas Bettadpur; Byron D. Tapley
• Keywords: Regularization

Abstract The determination of the gravity model for Gravity Recovery and Climate Experiment (GRACE) is susceptible to modeling errors, measurement noise, observability issues. ill‐posed GRACE estimation problem causes unconstrained RL05 solutions have north‐south stripes. We discuss development global equal area mascon improve information study Earth surface processes. These regularized are developed with a 1° resolution using Tikhonov regularization in geodesic grid domain. derived from only, no external or data used inform constraints. matrix time variable will not bias attenuate future regional signals some past statistics other models. resulting Center Space Research (CSR) stripe errors capture all observed by within noise level. tailored specific applications nature. This discusses solution approach compares postprocessed results spherical harmonic studies Arctic ice sheet processes, ocean bottom pressure variation, land total water storage change. suite comparisons leads conclusion that presented here an enhanced representation provide accurate surface‐based gridded can be without further processing.