Combined InSAR and GRACE estimate of West Antarctic mass changes

We provide mass balance estimates for seven West Antarctic drainage basins using InSAR and GRACE Level 2 data.We combine both data sets in a constrained gravity- field inversion, which involves forward modelling of geoid changes based on mass balance estimates and their uncertainties from InSAR. We...

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Bibliographic Details
Main Authors: Sasgen, I., Martinec, Z., Bamber, J., Fleming, K.
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
Antarc*
Antarctica
Online Access:https://gfzpublic.gfz-potsdam.de/pubman/item/item_236822
Description
Summary:We provide mass balance estimates for seven West Antarctic drainage basins using InSAR and GRACE Level 2 data.We combine both data sets in a constrained gravity- field inversion, which involves forward modelling of geoid changes based on mass balance estimates and their uncertainties from InSAR. 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 and inter-annual mass variations on our results.

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