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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 is from 26 October 1978 to 31 December 2025.
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 [Dataset]. NASA National Snow and Ice Data Center Distributed Active Archive Center. https://doi.org/10.5067/MPYG15WAA4WX Date Accessed: 2026-10-27
Satellite sea-ice concentration data were obtained from the NASA National Snow and Ice Data Center (NSIDC) Sea Ice Concentrations from Nimbus-7 SMMR and DMSP SSM/I–SSMIS Passive Microwave Data, Version 2 (NSIDC-0051; https://doi.org/10.5067/MPYG15WAA4WX). Sea-ice motion data were obtained from the NSIDC Quicklook Arctic Weekly EASE-Grid Sea Ice Motion Vectors, Version 1 (NSIDC-0748; https://doi.org/10.5067/O0XI8PPYEZJ6). ERA5 monthly mean single-level fields are available from the Copernicus Climate Data Store (https://doi.org/10.24381/cds.f17050d7), and ERA5 monthly mean pressure-level fields are available at https://doi.org/10.24381/cds.6860a573. The INTAROS-opt ocean-sea-ice reanalysis used for the process-based sea-ice tendency diagnostics was produced using the adjoint-based MITgcm system described by Lyu et al. (2021, 2025). The model configuration and outputs associated with the Lyu et al. (2025) experiments are publicly available through Zenodo (https://doi.org/10.5281/zenodo.14584780), with the modified MITgcm code available at https://doi.org/10.5281/zenodo.14584929. The extended 2007-2025 INTAROS-opt fields used in this study are available at http://dx.doi.org/10.12157/IOCAS.20260819.001.
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 [Dataset]. NASA National Snow and Ice Data Center Distributed Active Archive Center. https://doi.org/10.5067/MPYG15WAA4WX Date Accessed: 2026-10-27
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, https://doi.org/10.5067/MPYG15WAA4WX. Date Accessed: 2026-10-27
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DuVivier, Alice K., Krumhardt, Kristen M., Landrum, Laura L., Sylvester, Zephyr, Sen, Bilgecan, Labrousse, Sara, Che-Castaldo, Christian, Eparvier, Alice, Holland, Marika M., LaRue, Michelle A., Nissen, Cara, Levy, Michael N., Jenouvrier, Stephanie, Brooks, Cassandra
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