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Description
This data set is generated from brightness temperature data and is designed to provide a consistent time series of sea ice concentrations spanning the coverage of several passive microwave instruments.The data are provided in the polar stereographic projection at a grid cell size of 25 x 25 km. Data coverage began on 26 October 1978 and is ongoing through the most current processing, with updated data processed several times annually.
Citation is critically important for dataset documentation and discovery. This dataset is openly shared, without restriction, in accordance with the EOSDIS Data Use and Citation Guidance.
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DiGirolamo, N., Parkinson, C., Cavalieri, D., Gloersen, P., & Zwally, H. (2022). Sea Ice Concentrations from Nimbus-7 SMMR and DMSP SSM/I-SSMIS Passive Microwave Data, Version 2 [Data set]. NASA National Snow and Ice Data Center Distributed Active Archive Center. https://doi.org/10.5067/MPYG15WAA4WX Date Accessed: 2026-05-17
DiGirolamo, Nicolo, Claire Parkinson, Donald Cavalieri, Per Gloersen, and H. Zwally. “Sea Ice Concentrations from Nimbus-7 SMMR and DMSP SSM/I-SSMIS Passive Microwave Data, Version 2.” NASA National Snow and Ice Data Center Distributed Active Archive Center, 2022. doi:10.5067/MPYG15WAA4WX. Date Accessed: 2026-05-17
DiGirolamo, Nicolo, et al. Sea Ice Concentrations from Nimbus-7 SMMR and DMSP SSM/I-SSMIS Passive Microwave Data, Version 2. NASA National Snow and Ice Data Center Distributed Active Archive Center, 2022, doi:10.5067/MPYG15WAA4WX. Date Accessed: 2026-05-17