21.11.2016: FB1-Seminar

11:00 h, Hörsaal, Düsternbrooker Weg 20

Abstract:

The past ten years have been a golden decade for Polar ice sheet remote sensing. Satellite laser and radar altimeters, temporal gravimetry measurements and interferometric radar observations; all three techniques were in space at the same time and revealed an increasingly detailed image of the of the changing Polar ice sheets. The combination of different satellite sensors allowed us to improve the spatial and temporal accuracy. And it helped us to separate individual processes in the often superimposed signatures recovered by the satellites. At the same time, numerical models of snow accumulation, snow melt and refreezing, as well as of the general atmospheric circulation have greatly improved; they are now able to reproduce the measured ice-sheet mass variations with unprecedented fidelity. With these tools it is now possible to continuously measure the ongoing changes in the Polar regions and connect them to the causative processes and large-scale climate drivers. This talk presents an overview on the changing Polar ice sheets from the space-geodetic perspective and shows how these transitions are the response to past and present climate forcing.

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