Sentinel-1 Sea Ice Concentration Products for the Melting Season in Fram Strait, Arctic (2021–2023)

The 1km resolution Sea Ice Concentration (SIC) dataset for Fram Strait in the Arctic during the melting periods (June to September) from 2021 to 2023 is generated using the Ice-WaterNet framework. To address the challenges posed by complex surface features during the melt season, such as wind-induced roughness in open-water regions and varying ice floe sizes, a superpixel-based approach is implemented. This approach effectively minimizes the uncertainty of ice-water classification by integrating Conditional Random Fields (CRF) with U-Net models. CRF is used to identify uncertain superpixels, while uncertainty is progressively reduced through iterative refinement within the edges of superpixels, utilizing the U-Net attention mechanism for enhanced accuracy. The dataset includes daily SIC products available in both NetCDF and GeoTIFF formats, along with the corresponding georeference information provided in NetCDF format. Additionally, a separate textfile detailing the color indexing is included for visualization purposes.