Present-day West Antarctic ice-mass change estimate by the constrained inversion of GRACE and InSAR data

We estimate the ice-mass loss in West Antarctica from the Gravity Recovery and Climate Experiment (GRACE) using an inverse gravimetric approach. The inversion is constrained by the InSAR data to minimize the ambiguity of the resulting mass estimates. We determine the spatial resolution of GRACE over...

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Bibliographic Details
Main Authors: Sasgen, I., Martinec, Z., Bamber, J.
Other Authors: 1.3 Earth System Modelling, 1.0 Geodesy and Remote Sensing, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum
Format: Conference Object
Language:unknown
Published: 2008
Subjects:
550 - Earth sciences
Antarctic
West Antarctica
Antarc*
Antarctica
Online Access:https://gfzpublic.gfz-potsdam.de/pubman/item/item_238006
Description
Summary:We estimate the ice-mass loss in West Antarctica from the Gravity Recovery and Climate Experiment (GRACE) using an inverse gravimetric approach. The inversion is constrained by the InSAR data to minimize the ambiguity of the resulting mass estimates. We determine the spatial resolution of GRACE over Antarctica and use it to calculate unconstrained (GRACE only) mass balance estimates for a reduced number of drainage basins. We compare InSAR, constrained and unconstrained mass change rates, estimate their uncertainties and discuss the influence of glacial-isostatic adjustment on our results.

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