The Cryosphere
The Cryosphere
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Articles | Volume 20, issue 11
Articles | Volume 20, issue 11
https://doi.org/10.5194/tc-20-6181-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/tc-20-6181-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 20, issue 11
Research article
 | 
30 Oct 2026
Research article |  | 30 Oct 2026

Empirical evidence of overestimated Ku-band sea ice radar freeboards in satellite altimetry

Catherine Taelman, Jack C. Landy, Robbie D. C. Mallett, and Polona Itkin

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Short summary
Arctic sea ice thickness is commonly estimated using radar measurements from satellites. This technique assumes that the snow on sea ice is "invisible" to the radar signals. We studied if this assumption is valid and found that the radar measurements work well in cold conditions, when air temperatures are below –10 °C. However, the radar measurements can overestimate ice thickness during warmer periods, especially if there is new snowfall and if the snow contains salt.
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