A long-term wintertime snow depth dataset on Arctic sea ice (1978-2025) derived from multisource passive microwave radiometer data

This dataset contains daily snow depth on Arctic sea ice during the cold seasons (October to April) for the period of 1978 to 2025. The snow depth estimate and its uncertainty are produced at a spatial resolution of 25 km × 25 km using brightness temperature observations from SMMR, SSM/I, and SSMIS. The uploaded file is titled “SYSU_SnowDepth.zip”. Two variables were provided, snow depth and snow depth uncertainty. Both are in the unit of centimeter. Naming convention is "SYSU_NH_ YYYYMMDD_Snow_Depth.bin" for snow depth and "SYSU_NH_YYYYMMDD_Snow_Depth_Uncertainty.bin". The longitude and latitude grids were also provided. The data format is a 32-bit floating point array in shape of 448 by 304 (NSIDC 25 km polar stereographic grid, please refer to https://nsidc.org/data/user-resources/help-center/guide-nsidcs-polar-stereographic-projection). An example to read the snow depth data on January 1, 2025 using Matlab: fid = fopen(' SYSU_NH_20250101_Snow_Depth.bin', 'rb', 'ieee-be'); B = fread(fid, [304, 448], 'single')'; fclose(fid);