Sea-ice index

IDENTIFICATION
DescriptionThe Sea Ice Index is a climate indicator of sea-ice coverage. The index covers both the sea-ice extent and area over the last 40+ years and is continuously updated to present time. It consists of an updated series of graphs (.png) visualising the trends and evolution of sea ice at hemispheric, global and regional scales. In addition, the data files (.txt and .nc) are available for users who are interested in analysing and plotting the data themselves. The Sea Ice Index is derived from the OSI SAF Global Sea Ice Concentration data, with R&D input from ESA CCI.
Product typeNear real time productArctic Sea Ice Extent
StatusDemonstrational
Status commentWe invite users to give feedback on the index before we make it operational.
IdentifierOSI-420
AcronymSIIN
CHARACTERISTICS
Processing levelIndicator
Satellite inputSMMR, DMSP/SSM/I, DMSP/SSMIS
FrequencyUpdated daily
Spatial coverageHemispherical and regional
ACCURACY REQUIREMENTS
DATA ACCESS
Diffusion mean(s) and format(s)HL FTP Server (NetCDF4)
HL FTP server (Text)
Main FTP serverHL FTP server (hosted by MET Norway)Other FTP server,
other mean(s) to access main server


EUMETCastEUMETCastDiscovery mean(s)
EUMETSAT Data CentreEDC
Applications and usersClimateOSI SAF ProducerNorwegian Meteorological Institute
VIEW MORE DOCUMENTATION
Product web pageDescriptionProduct User ManualPUM
Last products at a glanceQuicklook
HISTORY, COMMENTS

Use of the product(s) should be acknowledged with the following citation:

EUMETSAT Ocean and Sea Ice Satellite Application Facility, Sea ice index 1979-onwards (v2.1, 2020), OSI-420, Data extracted from OSI SAF FTP server: ([extracted period],) ([extracted domains],)) accessed [download date]

For example:

EUMETSAT Ocean and Sea Ice Satellite Application Facility, Sea ice index 1979-onwards (v2.1, 2020), OSI-420, Data extracted from OSI SAF FTP server: 1979-2019, Northen Hemisphere, Barents Sea, accessed 2020-11-19

When the data are used or displayed, they can be labelled as “OSI SAF Sea Ice Index v2.1” (alternatively “OSI SAF SIIN v2.1”, “OSI SAF SII v2.1”, or the like).

An acknowledgement sentence could be: “The OSI SAF Sea Ice Index v2.1 is made available athttps://osisaf-hl.met.no/v2p1-sea-ice-index”.

The above acknowledgement may be accompanied by a citation to Lavergne et al. (2019), that documents the Sea Ice Concentration Climate Data Records used in the Sea Ice Index, e.g. The OSI SAF Sea Ice Index v2p1 is prepared using EUMETSAT OSI SAF Sea Ice Concentration data,with R&D input from the ESA Climate Change Initiative (ESA CCI) (Lavergne et al. 2019).

First product date01/01/1979