Articles | Volume 12, issue 5
https://doi.org/10.5194/tc-12-1767-2018
https://doi.org/10.5194/tc-12-1767-2018
Research article
 | 
25 May 2018
Research article |  | 25 May 2018

Seasonal variations of the backscattering coefficient measured by radar altimeters over the Antarctic Ice Sheet

Fifi Ibrahime Adodo, Frédérique Remy, and Ghislain Picard

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Cited articles

Allison, I., Alley, R. B., Fricker, H. A., Thomas, R. H., and Warner, R. C.: Ice sheet mass balance and sea level, Antarct. Sci., 21, 413–426, 2009. 
Armitage, T. W. K., Wingham, D. J., and Ridout, A. L.: Meteorological Origin of the Static Crossover Pattern Present in Low-Resolution-Mode CryoSat-2 Data Over Central Antarctica, IEEE Geosci. Remote Sens. Lett., 11, 1295–1299, https://doi.org/10.1109/LGRS.2013.2292821, 2014. 
Arthern, R. J., Wingham, D. J., and Ridout, A. L.: Controls on ERS altimeter measurements over ice sheets: Footprint-scale topography, backscatter fluctuations, and the dependence of microwave penetration depth on satellite orientation, J. Geophys. Res.-Atmos., 106, 33471–33484, 2001. 
Bingham, A. W. and Drinkwater, M. R.: Recent changes in the microwave scattering properties of the Antarctic ice sheet, IEEE Trans. Geosci. Remote Sens., 38, 1810–1820, https://doi.org/10.1109/36.851765, 2000. 
Brenner, A. C., DiMarzio, J. P., and Zwally, H. J.: Precision and accuracy of satellite radar and laser altimeter data over the continental ice sheets, IEEE Trans. Geosci. Remote Sens., 45, 321–331, 2007. 
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Short summary
In Antarctica, the seasonal cycle of the backscatter behaves differently at high and low frequencies, peaking in winter and in summer, respectively. At the intermediate frequency, some areas behave analogously to low frequency in terms of the seasonal cycle, but other areas behave analogously to high frequency. This calls into question the empirical relationships often used to correct elevation changes from radar penetration into the snowpack using backscatter.