Articles | Volume 19, issue 10
https://doi.org/10.5194/tc-19-4819-2025
https://doi.org/10.5194/tc-19-4819-2025
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

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This preprint is open for discussion and under review for The Cryosphere (TC).
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Cited articles

Bennetts, L. G., Bitz, C. M., Feltham, D. L., Kohout, A. L., and Meylan, M. H.: Theory, modelling and observations of marginal ice zone dynamics: Multidisciplinary perspectives and outlooks, Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 380, 20210265, https://doi.org/10.1098/rsta.2021.0265, 2022. a
Brucker, L., Cavalieri, D. J., Markus, T., and Ivanoff, A.: NASA Team 2 Sea Ice Concentration Algorithm Retrieval Uncertainty, IEEE Transactions on Geoscience and Remote Sensing, 52, 7336–7352, https://doi.org/10.1109/TGRS.2014.2311376, 2014. a
Buckley, E. M., Horvat, C., and Yoosiri, P.: Sea ice concentration estimates from ICESat-2 linear ice fraction – Part 1: Multi-sensor comparison of sea ice concentration products, The Cryosphere, 19, 4805–4818, https://doi.org/10.5194/tc-19-4805-2025, 2025. a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, s, t
Buckley, E. M., Farrell, S. L., Duncan, K., Connor, L. N., Kuhn, J. M., and Dominguez, R. T.: Classification of Sea Ice Summer Melt Features in High‐Resolution IceBridge Imagery, Journal of Geophysical Research: Oceans, 125, https://doi.org/10.1029/2019JC015738, 2020. a
Cavalieri, D. J., Gloersen, P., and Campbell, W. J.: Determination of sea ice parameters with the NIMBUS 7 SMMR, Journal of Geophysical Research: Atmospheres, 89, 5355–5369, https://doi.org/10.1029/JD089iD04p05355, 1984. a
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.
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