Abstract:Using GRACE gravity field solutions (RL05) released by the CSR, we estimate the global mean ocean mass change by applying several different filtering methods. To compare, we also use GRACE-based DDK1-DDK5 filtered datasets provided by GFZ to estimate global mean ocean mass change. The results show that different filtering methods lead to significant differences in estimates of global ocean mass change, including geographic patterns, time evolution and frequency characteristics. During the period from 2002 to 2014, an increase rate of global mean ocean mass change is 1.17-1.26 mm/a given by CSR RL05 datasets and 1.29-145 mm/a derived from GFZ DDK solution; the acceleration of the two datasets are 0.1 mm/a2 and 0.07 mm/a2 respectively.
XI Hui,ZHANG Zizhan,LU Yang et al. The Performances of Different Filtering Methods on Ocean Mass Change Estimated from GRACE[J]. jgg, 2016, 36(5): 380-.