Abstract
Due to the scarcity of data, modeling the glacial isostatic adjustment (GIA) for Antarctica is more difficult than it is for the ancient ice sheet area in North America and Northern Europe. Large uncertainties are observed in existing GIA models for Antarctica. Modern space-based geodetic measurements provide checks and constraints for GIA models. The present-day uplift velocities of global positioning system (GPS) stations at 73 stations in Antarctica and adjacent regions from 1996 to 2014 have been estimated using GAMIT/GLOBK version 10.5 with a colored noise model. To easily analyze the effect of difference sources on the vertical velocities, and for easy comparison with both GIA model predictions and GPS results from Argus et al. (2014) and Thomas et al. (2011), seven sub-regions are divided. They are the northern Antarctic Peninsula, the Filchner-Ronne Ice Shelf, the Amundsen Sea coast, the Ross Ice Shelf, Mount Erebus, inland Southwest Antarctica and the East Antarctic coast, respectively. The results show that the fast uplift in the north Antarctic Peninsula and Pine Island Bay regions may be caused by the elastic response to snow and ice mass loss. The fast subsidence near Mount Erebus may be related to the activity of a magma body. The uplift or subsidence near the East Antarctic coast is very slow while the uplift for the rest regions is mainly caused by GIA. By analyzing the correlation and the associated weighted root mean square (WRMS) between the GIA predictions and the GPS velocities, we found that the ICE-6G_C (VM5a) model and the Geruo13 model show the most consistency with our GPS results, while the W12a and IJ05_R2 series models show poor consistency with our GPS results. Although improved greatly in recent years, the GIA modeling in Antarctica still lags behind the modeling of the North American. Some GPS stations, for example the Bennett Nunatak station (BENN), have observed large discrepancies between GIA predictions and GPS velocities. Because of the large uncertainties in calculating elastic responses due to the significant variations of ice and snow loads, the GPS velocities still cannot be used as a precise constraint on GIA models.
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References
Altamimi Z, Collilieux X. 2009. IGS contribution to the ITRF. J Geod, 83: 375–383
Argus D F, Peltier W R, Drummond R, Moore A W. 2014. The Antarctica component of postglacial rebound model ICE-6GC (VM5a) based on GPS positioning, exposure age dating of ice thicknesses, and relative sea level histories. Geophys J Int, 198: 537–563
Argus D F, Peltier W R. 2010. Constraining models of postglacial rebound using space geodesy: A detailed assessment of model ICE-5G (VM2) and its relatives. Geophys J Int, 107: 697–723
Blewitt G, Lavallée D. 2003. Effect of annual signals on geodetic velocity. J Geophys Res, 108: 2010
Boening C, Lebsock M, Landerer F, Stephens G. 2012. Snowfall-driven mass change on the East Antarctic ice sheet. Geophys Res Lett, 39: L21501
E Dong Chen, Zhang S K. 2006. Infrastructure and progress of international Antarctic geodetic reference framework (in Chinese). J Geodesy Geody, 26: 104–108
Geruo A, Wahr J, Zhong S. 2013. Computations of the viscoelastic response of a 3-D compressible Earth to surface loading: An application to Glacial Isostatic Adjustment in Antarctica and Canada. Geophys J Int, 192: 557–572
Ivins E R, James T S, Wahr J, Schrama O E J, Landerer F W, Simon K M. 2013. Antarctic contribution to sea level rise observed by GRACE with improved GIA correction. J Geophys Res-Solid Earth, 118: 3126–3141
Jiang W P, Zhou X H. 2015. Effect of the span of Australian GPS coordinate time series in establishing an optimal noise model. Sci China Earth Sci, 58: 523–539
Jiang W, Zhao Q, Liu H, Yang K. 2011. Application of the sub-network division in large scale GNSS reference station network (in Chinese). Geomat Inform Sci Wuhan Univ, 36: 389–391
King M A, Altamimi Z, Boehm J, Bos M, Dach R, Elosegui P, Fund F, Hernández-Pajares M, Lavallee D, Mendes Cerveira P J, Penna N, Riva R E M, Steigenberger P, van Dam T, Vittuari L, Williams S, Willis P. 2010. Improved constraints on models of glacial isostatic adjustment: A review of the contribution of ground-based geodetic observations. Surv Geophys, 31: 465–507
King M A, Santamaría-Gómez A. 2016. Ongoing deformation of Antarctica following recent great earthquakes. Geophys Res Lett, 43: 1918–1927
Li W, Ju X, Shen Y, Zhang Z. 2014. Vertical deformation analysis of Antarctic GNSS stations combined using GNSS and GRACE data. Chin J Polar Res, 26: 238–243
Li F, Ma C, Zhang S K, Lei J, Hao W, Zhang Q, Li W. 2016. Noise analysis of the coordinate time series of the continuous GPS station and the deformation patterns in the Antarctic Peninsula (in Chinese). Chin J Geophys, 59: 2402–2412
Ma C, Li F, Zhang S K, Lei J, E D, Hao W, Zhang Q. 2016. The coordinate time series analysis of continuous GPS stations in the Antarctic Peninsula with consideration of common mode error (in Chinese). Chin J Geophys, 59: 2783–2795
Milne G A, Davis J L, Mitrovica J X, Scherneck H G, Johansson J M, Vermeer M, Koivula H. 2001. Space-geodetic constraints on glacial isostatic adjustment in Fennoscandia. Science, 291: 2381–2385
Mitrovica J X, Gomez N, Clark P U. 2009. The sea-level fingerprint of West Antarctic collapse. Science, 323: 753
Nield G, Whitehouse P, King M, Clarke P. 2015. Glacial Isostatic Adjustment on the Siple Coast. Vienna: EGU General Assembly Conference Abstracts, 17: 10494
Nikolaidis R. 2002. Observation of geodetic and seismic deformation with the Global Positioning System. Dissertation for Doctoral Degree. San Diego: University of California
Park K D, Nerem R S, Davis J L, Schenewerk M S, Milne G A, Mitrovica J X. 2002. Investigation of glacial isostatic adjustment in the northeast U. S. using GPS measurements. Geophys Res Lett, 29: 1509
Paulson A, Zhong S, Wahr J. 2007. Inference of mantle viscosity from GRACE and relative sea level data. Geophys J Int, 171: 497–508
Peltier W R. 2004. Global glacial isostasy and the surface of the ice-age Earth: The ICE-5G (VM2) model and GRACE. Annu Rev Earth Planet Sci, 32: 111–149
Peltier W R, Argus D F, Drummond R. 2015. Space geodesy constrains ice age terminal deglaciation: The global ICE-6GC (VM5a) model. J Geophys Res-Solid Earth, 120: 450–487
Prandi P, Cazenave A, Becker M. 2009. Is coastal mean sea level rising faster than the global mean? A comparison between tide gauges and satellite altimetry over 1993–2007. Geophys Res Lett, 36: L05602
Pritchard M. 2010. Deformation explained. Nat Geosci, 3: 515
Takada Y, Fukushima Y. 2013. Volcanic subsidence triggered by the 2011 Tohoku earthquake in Japan. Nat Geosci, 6: 637–641
Thomas I D, King M A, Bentley M J, Whitehouse P L, Penna N T, Williams S D P, Riva R E M, Lavallee D A, Clarke P J, King E C, Hindmarsh R C A, Koivula H. 2011. Widespread low rates of Antarctic glacial isostatic adjustment revealed by GPS observations. Geophys Res Lett, 38: L22302
Wang H. 2009. Glacial isostatic adjustment model constrained by geodetic measurements and relative sea level. Chin J Geophys, 52: 2450–2460
Wang H, Wu P. 2006. Effects of lateral variations in lithospheric thickness and mantle viscosity on glacially induced surface motion on a spherical, self-gravitating Maxwell Earth. Earth Planet Sci Lett, 244: 576–589
Wang H, Wu P, van der Wal W. 2008. Using postglacial sea level, crustal velocities and gravity-rate-of-change to constrain the influence of thermal effects on mantle lateral heterogeneities. J Geodyn, 46: 104–117
Whitehouse P L, Bentley M J, Le Brocq A M. 2012a. A deglacial model for Antarctica: Geological constraints and glaciological modelling as a basis for a new model ofAntarctic glacial isostatic adjustment. Quat Sci Rev, 32: 1–24
Whitehouse P L, Bentley M J, Milne G A, King M A, Thomas I D. 2012b. A new glacial isostatic adjustment model for Antarctica: Calibrated and tested using observations of relative sea-level change and present-day uplift rates. Geophys J Int, 190: 1464–1482
Wilson T J, Bevis M, Konfal S, Barletta V, Aster R, Chaput J, Heeszel D, Wiens D, Anandakrishnan S, Dalziel I, Huerta A, Kendrick E, Nyblade A, Winberry P, Smalley B, Lloyd A. 2015. Understanding glacial iso-static adjustment and ice mass change in Antarctica using integrated GPS and seismology observations. Vienna: EGU General Assembly Conference Abstracts. 17: 7762
Wu P, Wang H. 2006. Effects of mode coupling and location of rotational axis on glacial induced rotational deformation in a laterally heterogeneous viscoelastic earth. Geophys J Int, 167: 853–859
Zhu X H, Sun F P. 2005. Detection of postglacial rebound by using VLBI data (in Chinese). Chin J Geophys, 48: 308–313
Acknowledgements
We thank MIT/SID for provision of GAMIT/GLOBK software suit; IGS, POLENET for IGS and POLENET GPS data (all these data are downloaded from the FTP service garner.ucsd.edu/pub/), CACSM (Chinese Antarctica Center of Surveying and Mapping) for data of ZHON; and all the researchers and agents for the GIA models used in this study. This work was supported by the National Key Research and Development Program of China (Grant No. 2017YFA0603104), the State Key Program of the National Natural Science Foundation of China (Grant No. 41531069), and the Independent Scientific Research Program for Cross-disciplinary of Wuhan University (Grant No. 2042017kf0209).
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Li, F., Ma, C., Zhang, S. et al. Evaluation of the glacial isostatic adjustment (GIA) models for Antarctica based on GPS vertical velocities. Sci. China Earth Sci. 63, 575–590 (2020). https://doi.org/10.1007/s11430-018-9532-5
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DOI: https://doi.org/10.1007/s11430-018-9532-5