Version 2 of the EUMETSAT OSI SAF and ESA CCI sea-ice concentration climate data records

We introduce the OSI-450, the SICCI-25km and the SICCI-50km climate data records of gridded global sea-ice concentration. These three records are derived from passive microwave satellite data and offer three distinct advantages compared to existing records: first, all three records provide quantitat...

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Bibliographic Details
Published in:The cryosphere 2019-01, Vol.13 (1), p.49-78
Main Authors: Lavergne, Thomas, Sorensen, Atle Macdonald, Kern, Stefan, Tonboe, Rasmus, Notz, Dirk, Aaboe, Signe, Bell, Louisa, Dybkjaer, Gorm, Eastwood, Steinar, Gabarro, Carolina, Heygster, Georg, Killie, Mari Anne, Brandt Kreiner, Matilde, Lavelle, John, Saldo, Roberto, Sandven, Stein, Pedersen, Leif Toudal
Format: Article
Language:English
Subjects:
Algorithms
Arctic research
Calibration
Climatic data
Earth
Evaluation
Evolution
High seas
Ice
Ice cover
Imaging techniques
Measurement
Missions
Observations
Records
Regions
Satellite data
Satellites
Sea ice
Sea ice concentrations
Special Sensor Microwave Imager
Surface properties
User services
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Summary:We introduce the OSI-450, the SICCI-25km and the SICCI-50km climate data records of gridded global sea-ice concentration. These three records are derived from passive microwave satellite data and offer three distinct advantages compared to existing records: first, all three records provide quantitative information on uncertainty and possibly applied filtering at every grid point and every time step. Second, they are based on dynamic tie points, which capture the time evolution of surface characteristics of the ice cover and accommodate potential calibration differences between satellite missions. Third, they are produced in the context of sustained services offering committed extension, documentation, traceability, and user support. The three records differ in the underlying satellite data (SMMR & SSM/I & SSMIS or AMSR-E & AMSR2), in the imaging frequency channels (37 GHz and either 6 or 19 GHz), in their horizontal resolution (25 or 50 km), and in the time period they cover. We introduce the underlying algorithms and provide an evaluation. We find that all three records compare well with independent estimates of sea-ice concentration both in regions with very high sea-ice concentration and in regions with very low sea-ice concentration. We hence trust that these records will prove helpful for a better understanding of the evolution of the Earth's sea-ice cover.
ISSN:1994-0424
1994-0416
1994-0424
1994-0416
DOI:10.5194/tc-13-49-2019