Multi-reference flow-matching for probabilistic sea-ice concentration retrieval from Sentinel-1 SAR — Dataset

This dataset contains the trained-model inference outputs and evaluation results accompanying the paper: Lee, S.-J., Kim, J., Yun, H.-S. (2026). "Toward navigation-relevant sea-ice information: uncertainty-aware sea-ice concentration retrieval from Sentinel-1 SAR via multi-reference flow matching." International Journal of Applied Earth Observation and Geoinformation (under review). The code used to generate these results is archived on GitHub: https://github.com/lsj794222-stack/Arctic-SeaIce-FlowMatching CONTENTS zenodo_main.tar (30.4 GB) — Per-scene ensemble inference outputs of the multi-reference flow-matching model on the 100 held-out Sentinel-1 EW GRDM test scenes. Each scene has 20 ensemble members (256-pixel patches stitched into the full scene grid). Each *_pred.npz file contains the ensemble mean, per-pixel standard deviation, and the 20 individual members. zenodo_det.tar (5.5 GB) — Single-output predictions of the deterministic U-Net baseline on the same 100 test scenes. zenodo_supporting.tar.gz (10 MB) — Aggregated evaluation data: aggregates_compact.npz: pixel-level reference vs. prediction arrays used to compute Figures 5, 6, and 7 in the paper. summary_metrics.csv, per_scene_metrics.csv: Table 2 source data. evaluation_regimes/: regime-stratified metrics (Figure 5 panel d). tables/: Table 1 and Table 2 in CSV, Markdown, and LaTeX formats. figures/: rendered PNG figures for cross-checking. REPRODUCING THE PAPER FIGURES All figures and tables can be reproduced with the code in the GitHub repository (release v1.0.0). Quick-start figures (Fig 2, 3, 5, 6, Table 1, 2) require only the small files in data/sample/ of the GitHub repository. To regenerate Figure 7 (case study) and the full Figure 5 distributions, download the contents of this Zenodo record. DATA SOURCES USED DURING TRAINING AI4Arctic Sea Ice Challenge dataset (Ready-To-Train v3, DTU): https://data.dtu.dk/collections/6244065 NSIDC Climate Data Record of Passive Microwave Sea Ice Concentration, G02202 v6: https://nsidc.org/data/g02202 EUMETSAT OSI SAF Global Sea Ice Concentration CDR v3.1 (OSI-450-a1) and interim CDR v3.0 (OSI-430-a): https://osi-saf.eumetsat.int ERA5 hourly single-level reanalysis (Copernicus Climate Data Store): https://cds.climate.copernicus.eu