Global Sea Ice Concentration interim climate data record, release 2

Superseded Climate product

This product is an operational extension of the Sea Ice Concentration Climate Data Record OSI-450, with a latency of 16 days, starting in 2016. OSI-430-b uses passive microwave data (PMW) from the SSMIS sensors, and the same algorithms as OSI-450. The product includes error-bars for each grid cell (uncertainties).

Acronym : GBL SICO ICDR 2
OSI SAF producer : Norwegian Meteorological Institute
Identifier : OSI-430-b (complementing OSI-450)
Digital object identifier (DOI) 10.15770/EUM_SAF_OSI_NRT_2008
Processing level : L3+L4
Satellite input : DMSP/SSMIS
Other input : ECMWF re-analysis and forecast for atmospheric correction
Frequency : 1 per day
Central time : 12:00
Timeliness : 16 days
Spatial coverage : Global
Spatial sampling : 25 km
Projection : Lambert azimuthal
File Formats : HL FTP Server (NetCDF4)
Characteristics & methods : Daily averaged fractional ice cover in percentage. Fully consistent with with OSI-450, to ensure homogeneity.
Data Access
Main Diffusion Means : Archive HL FTP server :
Other means :


Accuracy Requirements
Target accuracy : 8 % (yearly average)
Verification/validation method : Comparison with high spatial resolution manual ice charts (available between twice a week and once a week) : the performance shall be validated for only the “ice” and “water” cases, separately.
Applications and users
Usage : Climate models, NWP and Ocean/Ice hindcast models, environmental agencies
Authorised to be operational / released :
Declared operational / released since :
On FTP server since :
First date :
  • Use of this dataset should be acknowledged with the following citation: EUMETSAT Ocean and Sea Ice Satellite Application Facility, Global sea ice concentration interim climate data record 2016-onwards (v2.0, 2017), OSI-430-b, (Data extracted from OSI SAF FTP server/EUMETSAT Data Center : ([extracted period],) ([extracted domain],)) accessed [download date]

    Fully consistent with OSI-450, to ensure homogeneity.

  • On 14/11/2022, the SG approved the change of status of OSI-430-b to “superseded” together with the release of OSI-430-a, however keeping OSI-430-b available for 5 months allowing users to adapt to the new ICDR.

    We plan to stop dissemination of OSI-430-b around the 2nd of May 2023.

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