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| Titel |
Uplift in the Prince Charles Mountain: A perspective from GPS, GRACE and GIA models |
| VerfasserIn |
Paul Tregoning, Herb McQueen, Kurt Lambeck |
| Konferenz |
EGU General Assembly 2010
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 12 (2010) |
| Datensatznummer |
250038057
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| Zusammenfassung |
| Starting in 1998, a network of remote GPS sites has operated in the Prince Charles Mountains
in East Antarctica to measure the present-day glacial isostatic adjustment (GIA) rates. Prior
to the commencement of this experiment, predicted uplift rates from available GIA models
were as high as 10-15 mm/yr. With substantial improvements in the accuracy of GPS analysis
over the past decade, we can now estimate uplift rates with accuracies of ~1 mm/yr.
However, such levels of accuracy require careful understanding of all aspects of the
GPS analysis, including the definition of the origin of the reference frame. We
will present the results of our GPS analysis and comparisons with available GIA
models and estimates of uplift derived from GRACE observations. We show that
the positive rate anomaly in Enderby Land detected by GRACE is most likely not
related to GIA and highlight the difficulties of estimating small rates of uplift from
observing techniques in the presence of significant non-linear surface motions. |
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