edu.ucar.opensky::articles:27011 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-24T18:56:38.319249 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.org/ark:/85065/d70869g5 https://doi.org/10.5067/ATLAS/ATL03.005 https Related Dataset #1 ATLAS/ICESat-2 L2A Global Geolocated Photon Data, version 5 https://doi.org/10.5067/ATLAS/ATL07.003 https Related Dataset #2 ATLAS/ICESat-2 L3A Sea Ice Height, version 3 https://doi.org/10.5281/zenodo.6928350 https Related Dataset #3 Data for Directional Surface Wave Spectra And Sea Ice Structure from ICEsat-2 Altimetry https://doi.org/10.5281/zenodo.6908645 https Related Software #1 Code for Directional Surface Wave Spectra And Sea Ice Structure from ICEsat-2 Altimetry without data https://doi.org/10.5281/zenodo.7439353 https Related Software #2 tsutterley/read-ICESat-2: v1.1.0 A method for constructing directional surface wave spectra from ICESat-2 altimetry 2024-01-19T00:00:00Z publication https://n2t.org/ark:/85065/d70869g5 https://doi.org/10.5194/tc-18-341-2024 Hell, Momme Claus author Horvat, C. author UCAR/NCAR - Library publisher Sea ice is important for Earth's energy budget as it influences surface albedo and air-sea fluxes in polar regions. On its margins, waves heavily impact sea ice. Routine and repeat observations of waves in sea ice are currently lacking, and therefore a comprehensive understanding of how waves interact with sea ice and are attenuated by it is elusive.In this paper, we develop methods to separate the two-dimensional (2D) surface wave spectra from sea-ice height observations made by the ICESat-2 (IS2) laser altimeter, a polar-orbiting satellite. A combination of a linear inverse method, called generalized Fourier transform (GFT), to estimate the wave spectra along each beam and a Metropolis-Hastings (MH) algorithm to estimate the dominant wave's incident angle was developed. It allows us to estimate the 2D wave signal and its uncertainty from the high-density, unstructured ATL03 ICESat-2 photon retrievals. The GFT is applied to re-binned photon retrievals on 25 km segments for all six beams and outperforms a discrete Fourier transform (DFT) in accuracy while having fewer constraints on the data structure.The MH algorithm infers wave direction from beam pairs every 25 km using coherent crests of the most energetic waves. Assuming a dominant incident angle, both methods together allow a decomposition into 2D surface wave spectra with the advantage that the residual surface heights can potentially be attributed to other sea-ice properties. The combined GFT-MH method shows promise in routinely isolating waves propagating through sea ice in ICESat-2 data. We demonstrate its ability on a set of example ICESat-2 tracks, suggesting a detailed comparison against in situ data is necessary to understand the quality of retrieved spectra. UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact PDF Text theme Resource Type 2016-01-01T00:00:00Z publication Copyright author(s). This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. None eng geoscientificInformation