Importance of seasonal and annual layers in controlling backscatter to radar altimeters across the percolation zone of an ice sheet
Article first published online: 19 DEC 2006
Copyright 2006 by the American Geophysical Union.
Geophysical Research Letters
Volume 33, Issue 24, December 2006
How to Cite
2006), Importance of seasonal and annual layers in controlling backscatter to radar altimeters across the percolation zone of an ice sheet, Geophys. Res. Lett., 33, L24502, doi:10.1029/2006GL027974., , , , , and (
- Issue published online: 19 DEC 2006
- Article first published online: 19 DEC 2006
- Manuscript Accepted: 8 NOV 2006
- Manuscript Revised: 19 OCT 2006
- Manuscript Received: 30 AUG 2006
 Radar altimeters are one of the main tools for measuring elevation changes across the Antarctic and Greenland ice sheets and larger ice caps. A ground-based radar was deployed in autumn 2004 and spring 2006 in the percolation zone of the Greenland Ice Sheet. This radar is a high bandwidth system operating in the Ku band, the same frequency as several satellite altimeters. Measurements were made over an elevation range of 1795 to 2350 m, along with snow pit and shallow core studies. These measurements demonstrate the spatial and temporal variations in the backscatter. Relative strengths of surface and volume reflections change dramatically between spring and autumn and there is also high spatial variability across the percolation zone. The extent of percolation will affect elevation estimates made by radar altimeters.