Global Sea Ice Concentration interim climate data record, release 2

Superseded Archived climate product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
Temporal sampling : 1 per day
Central time : 12:00
Timeliness : ? The timeliness is the time elapsing from the sensing time of the last contributing file to the product dissemination to users. It is similar to the latency. 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

OSI SAF FTP server

Directory: conc-cont-reproc/v2p0

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 :
Last date :
Detailed history :

An ICDR complement each version of the Global Sea Ice Concentration Climate Data Record:

[1st release] OSI-430 complemented OSI-409 and OSI-409-a on the period from 16/04/2015 to 31/12/2019

[2nd release] OSI-430-b complemented OSI-450 on the period from 01/01/2016 to 30/04/2023

[3rd release] OSI-430-a complements OSI-450-a on the period from 01/01/2021 onwards. We advice you to use the latest release.

  • 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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