2 Cazenave A, Nerem R S. Redistributing Earth’s mass. Science, 2002, 297: 783-784??
[2]
5 Yoder C K, Williams J G, Dickey J O, et al. Secular variations of Earth’s gravitational harmonic J2 coefficient from Lageos and nontidal acceleration of Earth rotation. Nature, 1983, 303: 757-762??
[3]
6 Eanes R. A study of temporal variation in Earth’s gravitational field using Lageos-1 laser range observations. CSR Report 95-8. The University of Texas at Austin, 1995
[4]
7 Chen J L, Wilson C R. Low degree gravitational changes from GRACE, Earth rotation, geophysical models, and satellite laser ranging. J Geophys Res, 2008, 113: B06402??
[5]
10 Jin S G, Wang J, Park P H. An improvement of GPS height estimates: Stochastic modeling. Earth Planets Space, 2005, 57: 253-259
[6]
14 Wahr J M, Molenaar M, Bryan F. Time variablility of the earth’s gravity field: Hydrological and oceanic effects and their possible detection using grace. J Geophys Res, 1998, 103: 30205-30229??
[7]
15 Jansen M, Gunter B, Kusche J. The impact of GRACE, GPS and OBP data on estimates of global mass redistribution. Geophys J Int, 2009, 177: 1-13??
[8]
16 Wu X, Heflin M B, Ivins E R, et al. Seasonal and inter-annual global surface mass variations from multisatellite geodetic data. J Geophys Res, 2006, 111: B09401??
[9]
18 Fukumori I, Lee T, Menemenlis D, et al. A dual assimilation system for satellite altimetry. In: Joint TOPEX/Poseidon and Jason-1 Science Working Team Meeting, NASA, Miami Beach, Fl, 2000
[10]
19 Rodell M, Houser P R, Jambor U, et al. The global land data assimilation system. Bull Am Meteor Soc, 2004, 85: 381-394??
[11]
20 Peltier W R. Postglacial variations in the level of the sea: Implications for climate dynamics and solid-Earth geophysics. Rev Geophys, 1998, 36: 603-689??
[12]
21 Dickey J O, Marcus S, de Viron O, et al. Recent Earth oblateness variations: Unraveling climate and postglacial rebound effects. Science, 2002, 298: 1975-1977??
[13]
1 Cox C, Chao B F. Detection of large-scale mass redistribution in the terrestrial system since 1998. Science, 2002, 297: 831-833??
[14]
3 Cheng M K, Tapley B D. Variations in the Earth’s oblateness during the past 28 years. J Geophys Res, 2004, 109: B09402??
[15]
4 Jin S G, Zhang L J, Tapley B D. The understanding of length-of-day variations from satellite gravity and laser ranging measurements. Geophys J Int, 2011, 184: 651-660??
[16]
8 Tapley B D, Battadpur S, Watkins M, et al. The gravity and climate recovery experiment: Mission overview and early results. Geophys Res Lett, 2004, 31: L09607??
[17]
9 Jin S G, Chambers D P, Tapley B D. Hydrological and oceanic effects on polar motion from GRACE and models. J Geophys Res, 2010, 115: B02403??
[18]
11 Farrell W E. Deformation of the Earth by surface loads. Rev Geophys, 1972, 10: 761-797??
[19]
12 Blewitt G, Clarke P. Inversion of Earth’s changing shape to weigh sea level in static equilibrium with surface mass redistribution. J Geo- phys Res, 2003, 108: 2311??
[20]
13 Kusche J, Schrama E J O. Surface mass redistribution inversion from global GPS deformation and gravity recovery and climate experiment (GRACE) gravity data. J Geophys Res, 2005, 110: B09409??
[21]
17 Altamimi Z, Collilieux X, Métivier L. ITRF2008: An improved solution of the international terrestrial reference frame. J Geodesy, 2011, 85: 457-473??