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Journal Article

Geodetic measurements of vertical crustal velocity in West Antarctica and the implications for ice mass balance

Authors

Bevis,  M.
External Organizations;
Publikationen aller GRACE-unterstützten Projekte, Deutsches GeoForschungsZentrum;

Kendrick,  E.
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Publikationen aller GRACE-unterstützten Projekte, Deutsches GeoForschungsZentrum;

Smalley,  R.
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Publikationen aller GRACE-unterstützten Projekte, Deutsches GeoForschungsZentrum;

Dalziel,  I.
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Publikationen aller GRACE-unterstützten Projekte, Deutsches GeoForschungsZentrum;

Caccamise,  D.
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Publikationen aller GRACE-unterstützten Projekte, Deutsches GeoForschungsZentrum;

/persons/resource/sasgen

Sasgen,  Ingo
Deutsches GeoForschungsZentrum;
Publikationen aller GRACE-unterstützten Projekte, Deutsches GeoForschungsZentrum;

Helsen,  M.
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Publikationen aller GRACE-unterstützten Projekte, Deutsches GeoForschungsZentrum;

Taylor,  F.W.
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Publikationen aller GRACE-unterstützten Projekte, Deutsches GeoForschungsZentrum;

Zhou,  H.
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Publikationen aller GRACE-unterstützten Projekte, Deutsches GeoForschungsZentrum;

Brown,  A.
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Publikationen aller GRACE-unterstützten Projekte, Deutsches GeoForschungsZentrum;

Raleigh,  D.
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Publikationen aller GRACE-unterstützten Projekte, Deutsches GeoForschungsZentrum;

Willis,  M.
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Publikationen aller GRACE-unterstützten Projekte, Deutsches GeoForschungsZentrum;

Wilson,  T.
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Publikationen aller GRACE-unterstützten Projekte, Deutsches GeoForschungsZentrum;

Konfal,  S.
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Publikationen aller GRACE-unterstützten Projekte, Deutsches GeoForschungsZentrum;

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Citation

Bevis, M., Kendrick, E., Smalley, R., Dalziel, I., Caccamise, D., Sasgen, I., Helsen, M., Taylor, F., Zhou, H., Brown, A., Raleigh, D., Willis, M., Wilson, T., Konfal, S. (2009): Geodetic measurements of vertical crustal velocity in West Antarctica and the implications for ice mass balance. - Geochemistry Geophysics Geosystems (G3), 10, Q10005.
https://doi.org/10.1029/2009GC002642


Cite as: https://gfzpublic.gfz-potsdam.de/pubman/item/item_239527
Abstract
We present preliminary geodetic estimates for vertical bedrock velocity at twelve survey GPS stations in the West Antarctic GPS Network, an additional survey station in the northern Antarctic Peninsula, and eleven continuous GPS stations distributed across the continent. The spatial pattern of these velocities is not consistent with any postglacial rebound (PGR) model known to us. Four leading PGR models appear to be overpredicting uplift rates in the Transantarctic Mountains and West Antarctica and underpredicting them in the peninsula north of 65!. This discrepancy cannot be explained in terms of an elastic response to modern ice loss (except, perhaps, in part of the peninsula). Therefore, our initial geodetic results suggest that most GRACE ice mass rate estimates, which are critically dependent on a PGR correction, are systematically biased and are overpredicting ice loss for the continent as a whole.