Abstract
Global positioning system (GPS) measurements have been collected quasi-continuously between November 1996 and January 2001 at two autonomous GPS stations in the Northern Transantarctic Mountains. High-quality data from the two sites at Mt. Coates in the Dry Valleys and Mt. Cocks in the Royal Society Range have resolved significant horizontal motions. The vertical rate at Mt. Coates indicates an uplift of 4.5±2.3 mm/year, most likely due to glacial isostatic motion. Uplift at Mt. Coates deviates significantly from uplift predictions based on deglaciation models ICE-3G and ICE-4G, but is consistent with a model (D91-1.5) in which deglaciation persists up to the late Holocene.
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