The Cryosphere
The Cryosphere
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Articles | Volume 20, issue 9
Articles | Volume 20, issue 9
https://doi.org/10.5194/tc-20-4839-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/tc-20-4839-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 20, issue 9
Research article
 | 
31 Aug 2026
Research article |  | 31 Aug 2026

Year-Round High-Resolution Sea Ice Freeboard Retrieval Using ICESat-2 ATL03 Photon Data

Wenxuan Liu, Ruibo Lei, Taoyong Jin, Heyang Sun, Michel Tsamados, Isolde A. Glissenaar, Jack Christopher Landy, and Yi Zhou

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Short summary
Arctic sea ice is thinning, but its height above the ocean is still hard to measure, especially in summer when melt ponds can look like open water from space. We developed a method that uses laser measurements from the Ice, Cloud, and land Elevation Satellite-2 and nearby satellite images to better separate ice from open water. It captures small ridges more clearly, improves lead detection, and provides year-round freeboard maps that can support better estimates of ice thickness.
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