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Horizontal velocity field, strain and grounding zone location for the area of the Nivlisen ice shelf, Dronning Maud Land.

Michael Baessler(1) and C.K. Shum(2)

(1) Dresden University of Technology, Dresden, 01062, Germany
(2) The Ohio State University, 470 Hitchcock Hall, Columbus, OH 43210, United States

Abstract

The mass flux across the grounding zone and therewith its position is of special interest for ice mass balance studies. The position is sensitive to sea level variations including ocean tides, sea bed topography and ice thickness.

This study will focus on the Nivlisen ice shelf in Dronning Maud Land and show a precisely mapped grounding zone. A change of its position due to ocean tides will be compared to predictions of vertical changes of a local ocean tide model.

An interferometrically derived horizontal velocity field (using ascending and descending orbit) will reflect on the dynamics of the ice sheet. Velocities obtained from GPS traverses across this area will be used for validation. Furthermore, a strain field will be shown as a result of a deformation analysis.

 

Keywords: ESA European Space Agency - Agence spatiale europeenne, observation de la terre, earth observation, satellite remote sensing, teledetection, geophysique, altimetrie, radar, chimique atmospherique, geophysics, altimetry, radar, atmospheric chemistry