Version 2 of the EUMETSAT OSI SAF and ESA CCI sea-ice concentration climate data records
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Published:2019-01-09
Issue:1
Volume:13
Page:49-78
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ISSN:1994-0424
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Container-title:The Cryosphere
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language:en
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Short-container-title:The Cryosphere
Author:
Lavergne ThomasORCID, Sørensen Atle Macdonald, Kern StefanORCID, Tonboe Rasmus, Notz DirkORCID, Aaboe SigneORCID, Bell Louisa, Dybkjær Gorm, Eastwood Steinar, Gabarro CarolinaORCID, Heygster Georg, Killie Mari Anne, Brandt Kreiner Matilde, Lavelle John, Saldo RobertoORCID, Sandven SteinORCID, Pedersen Leif ToudalORCID
Abstract
Abstract. 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.
Publisher
Copernicus GmbH
Subject
Earth-Surface Processes,Water Science and Technology
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