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

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

Aug 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011georl..3816303a&link_type=abstract

Geophysical Research Letters, Volume 38, Issue 16, CiteID L16303

Physics

1

Geodesy And Gravity: Time Variable Gravity (7223, 7230), Geodesy And Gravity: Satellite Geodesy: Results (6929, 7215, 7230, 7240), Global Change: Cryospheric Change (0776), Global Change: Sea Level Change (1222, 1225, 4304, 4556), Tectonophysics: Dynamics: Gravity And Tectonics

Scientific paper

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.

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