Rise of the Ellsworth mountains and parts of the East Antarctic coast observed with GPS

[1] Using GPS observations from 1996 to 2011, we constrain postglacial rebound in Antarctica. Sites in the Ellsworth mountains, West Antarctica, are rising at ≈5 ± 4 mm/yr (95% confidence limits), as in the postglacial rebound model of Peltier, but ≈10 mm/yr slower than in the model of Ivins and James. Therefore significant ice loss from the Ellsworth mountains ended by 4 ka, and current ice loss there is less than inferred from GRACE gravity observations in studies assuming the model of Ivins and James. Three sites along the coast of East Antarctica are rising at 3 to 4 ± 2 mm/yr, in viscous response to Holocene unloading of ice along the Queen Maud Land coast and elsewhere. Kerguelen island and seven sites along the coast of East Antarctic are part of a rigid Antarctica plate. O'Higgins, northern Antarctic peninsula, is moving southeast at 2.3 ± 0.6 mm/yr relative to the Antarctic plate.

[1]  Donald F. Argus,et al.  Defining the translational velocity of the reference frame of Earth , 2007 .

[2]  Grigory M. Steblov,et al.  Current global plate kinematics from GPS (1995–2007) with the plate‐consistent reference frame , 2008 .

[3]  C. Frohlich,et al.  Kinematics and segmentation of the South Shetland Islands‐Bransfield basin system, northern Antarctic Peninsula , 2008 .

[4]  W. Peltier,et al.  Constraining Models of Postglacial Rebound Using Space Geodesy , 2008 .

[5]  J. Wahr,et al.  Measurements of Time-Variable Gravity Show Mass Loss in Antarctica , 2006, Science.

[6]  E. Engdahl,et al.  Global teleseismic earthquake relocation with improved travel times and procedures for depth determination , 1998, Bulletin of the Seismological Society of America.

[7]  W. Peltier.  GLOBAL GLACIAL ISOSTASY AND THE SURFACE OF THE ICE-AGE EARTH: The ICE-5G (VM2) Model and GRACE , 2004 .

[8]  W. Peltier,et al.  On the postglacial isostatic adjustment of the British Isles and the shallow viscoelastic structure of the Earth , 2002 .

[9]  G. Blewitt.  Self‐consistency in reference frames, geocenter definition, and surface loading of the solid Earth , 2003 .

[10]  K. Lambeck,et al.  The melting history of the late Pleistocene Antarctic ice sheet , 1988, Nature.

[11]  M. Watkins,et al.  Glacial isostatic adjustment observed using very long baseline interferometry and satellite laser ranging geodesy , 1999 .

[12]  W. Peltier.  9.10 – History of Earth Rotation , 2007 .

[13]  P. Bird.  An updated digital model of plate boundaries , 2003 .

[14]  Byron D. Tapley,et al.  Accelerated Antarctic ice loss from satellite gravity measurements , 2009 .

[15]  W. R. Peltier,et al.  Closure of the budget of global sea level rise over the GRACE era: the importance and magnitudes of the required corrections for global glacial isostatic adjustment , 2009 .

[16]  Chris Rizos,et al.  The International GNSS Service in a changing landscape of Global Navigation Satellite Systems , 2009 .

[17]  G. Denton,et al.  Reconstructing the Antarctic Ice Sheet at the Last Glacial Maximum. , 2002 .

[18]  C. Rizos,et al.  The International GNSS Service in a changing landscape of Global Navigation Satellite Systems , 2009 .

[19]  R. Dunbar,et al.  Marine sediment record from the East Antarctic margin reveals dynamics of ice sheet recession , 2006 .

[20]  Archie Paulson,et al.  FAST TRACK PAPER: Inference of mantle viscosity from GRACE and relative sea level data , 2007 .

[21]  Z. Altamimi,et al.  ITRF2008: an improved solution of the international terrestrial reference frame , 2011 .

[22]  A. Hubbard,et al.  Deglacial history of the West Antarctic Ice Sheet in the Weddell Sea embayment: Constraints on past ice volume change , 2010 .

[23]  S. Owen,et al.  The angular velocities of the plates and the velocity of Earth's centre from space geodesy , 2010 .

[24]  G. Milne,et al.  Modelling Antarctic sea-level data to explore the possibility of a dominant Antarctic contribution to meltwater pulse IA , 2007 .

[25]  R. Dietrich,et al.  Signal and error in mass change inferences from GRACE: the case of Antarctica , 2009 .

[26]  E. Ivins,et al.  Antarctic glacial isostatic adjustment: a new assessment , 2005, Antarctic Science.

[27]  E. Ivins,et al.  Ocean loading effects on the prediction of Antarctic glacial isostatic uplift and gravity rates , 2010 .

[28]  Michael Bevis,et al.  Geodetic measurements of vertical crustal velocity in West Antarctica and the implications for ice mass balance , 2009 .

[29]  W. R. Peltiera,et al.  Global glacial ice volume and Last Glacial Maximum duration from an extended Barbados sea level record , 2006 .

[30]  S. McCallum,et al.  Stability of the Larsen B ice shelf on the Antarctic Peninsula during the Holocene epoch , 2005, Nature.

[31]  R. DeConto,et al.  Retreat of the East Antarctic ice sheet during the last glacial termination , 2011 .