文章基本信息

标题：Isostatic stability of the East Antarctic station Dumont d’Urville from long-term geodetic observations and geophysical models
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作者：Martine Amalvict ; Pascal Willis ; Guy Wöppelmann 等
期刊名称：Polar Research
印刷版ISSN：1751-8369
出版年度：2009
卷号：28
期号：2
页码：193-202
DOI：10.3402/polar.v28i2.6112
语种：English
出版社：Co-Action Publishing
摘要：Geodetic measurements of the vertical crustal displacement collocated with absolute gravity changes provide a discriminatory measurement of present-day glacial changes, versus more deeply seated rock motions caused by glacial isostatic adjustment (GIA). At the East Antarctic station of Dumont d’Urville, we compare the displacements derived from continuous DORIS (1993.0– 2006.0) and Global Positioning System (GPS) (1999.0–2005.7) data, and observed changes in absolute gravity (2000–2006), with the predicted vertical displacement and change in gravity from GIA modelling. The geodetic results have mutual self-consistency, suggest station stability and provide upper bounds on both GIA and secular ice mass changes. The GIA models tend to predict amplitudes of rock motion larger than those observed, and we conclude that this part of Antarctica is probably experiencing a slight gain in ice mass, in contrast to West Antarctica.