Delivery of new Suomi National Polar-orbiting Partnership (Suomi NPP) satellite observations will cease on November 2, 2026. Data users should transition now to alternative products from NOAA-21 and NOAA-20.Suomi NPP data announcement
Description
This data set is retired and no longer available for download. We recommend using the <a href="https://nsidc.org/data/nsidc-0051">newest version of Sea Ice Concentrations from Nimbus-7 SMMR and DMSP SSM/I-SSMIS Passive Microwave Data</a> (NSIDC-0051) data set as an alternative. </p>
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.
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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Cavalieri, D., Parkinson, C., Gloersen, P., & Zwally, H. (1996). Sea Ice Concentrations from Nimbus-7 SMMR and DMSP SSM/I-SSMIS Passive Microwave Data, Version 1 [Dataset]. NASA National Snow and Ice Data Center Distributed Active Archive Center. https://doi.org/10.5067/8GQ8LZQVL0VL Date Accessed: 2026-10-07
@misc{cavalieri_parkinson_gloersen_zwally_1996,
title={Sea Ice Concentrations from Nimbus-7 SMMR and DMSP SSM/I-SSMIS Passive Microwave Data, Version 1},
url={http://nsidc.org/data/NSIDC-0051/versions/1},
DOI={10.5067/8GQ8LZQVL0VL},
publisher={NASA National Snow and Ice Data Center Distributed Active Archive Center},
author={Cavalieri, Donald and Parkinson, Claire and Gloersen, Per and Zwally, H.},
year={1996},
}
Cavalieri, D., Parkinson, C., Gloersen, P., & Zwally, H. (1996). Sea Ice Concentrations from Nimbus-7 SMMR and DMSP SSM/I-SSMIS Passive Microwave Data, Version 1 [Dataset]. NASA National Snow and Ice Data Center Distributed Active Archive Center. https://doi.org/10.5067/8GQ8LZQVL0VL Date Accessed: 2026-10-07
Cavalieri, Donald, et al. “Sea Ice Concentrations from Nimbus-7 SMMR and DMSP SSM/I-SSMIS Passive Microwave Data, Version 1.” NASA National Snow and Ice Data Center Distributed Active Archive Center, 1996, https://doi.org/10.5067/8GQ8LZQVL0VL. Date Accessed: 2026-10-07
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