Sea ice concentration estimates from ICESat-2 linear ice fraction – Part 2: Gridded data comparison and bias estimation

Horvat, Christopher; Buckley, Ellen; Stewart, Madelyn

doi:https://doi.org/10.5194/tc-19-4819-2025

Articles | Volume 19, issue 10

https://doi.org/10.5194/tc-19-4819-2025

© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/tc-19-4819-2025

© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 19, issue 10

Research article

|

21 Oct 2025

Research article |

| 21 Oct 2025

Sea ice concentration estimates from ICESat-2 linear ice fraction – Part 2: Gridded data comparison and bias estimation

Christopher Horvat, Ellen Buckley, and Madelyn Stewart

Supplement

https://doi.org/10.5194/tc-19-4819-2025-supplement

Data sets

Gridded ICESat-2 data from Horvat et al (2025) Christopher Horvat https://doi.org/10.5281/zenodo.16950401

Model code and software

antipodalclimate/IS2-Emulator: First Release for submission: IS2-Emulator (v1.0) Christopher Horvat https://doi.org/10.5281/zenodo.13549563

antipodalclimate/IS2-Gridded-Products: v1.2 (v1.2) Christopher Horvat https://doi.org/10.5281/zenodo.13549269

antipodalclimate/IS2-LIF-paper-2024: Release for Submission of Revised TC Manuscript (Version v1) Christopher Horvat https://doi.org/10.5281/zenodo.15412480

Short summary

Since the late 1970s, standard methods for observing sea ice area from satellites have contrasted its passive microwave emissions to those of the ocean. Since 2018, a new satellite, ICESat-2, may have offered a unique and independent way to sample sea ice area at high skill and resolution, using laser altimetry. We develop a new product of sea ice area for the Arctic using ICESat-2 and constrain the biases associated with the use of altimetry instead of passive microwave emissions.