| Summary: | This dataset contains wintertime (Nov-Apr) daily Arctic sea ice surface form drag derived from ASCAT (2006-2021). The spatial resolution is 12.5*12.5 km projected onto a polar stereographic grid. The daily file (in netCDF format) contains three variables: Cdnfr, Cdn, and SIC_90_label. Cdnfr is the surface form drag (at 10m and in neutral stability), which is only valid for pixels with sea ice concentration (SIC) over 90%. Cdn is the total drag coefficient over sea ice as a sum of skin drag, surface form drag (Cdnfr), and floe form drag. SIC_90_label is a binary map labeling pixels with SIC>90% as 1. The geolocation information is provided in "PS_12500_grid_lat_lon.nc", which contains longitude and latitude for each grid cell and projection information. For the use of the dataset and details of the retrieval algorithm, please cite and read the following paper: Zhang Z, Hui F, Shokr M, et al. Winter Arctic Sea Ice Surface Form Drag During 1999–2021: Satellite Retrieval and Spatiotemporal Variability[J]. IEEE Transactions on Geoscience and Remote Sensing, 2023, doi:10.1109/TGRS.2023.3347694.
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