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Sea Ice Products

Operational Sea Ice Products

OPERATIONAL Global Sea Ice Concentration
TitleOSI-401-a: SSMIS Sea Ice Concentration Maps on 10 km Polar Stereographic Grid
DescriptionThe sea ice concentration product from the EUMETSAT OSI SAF. Ice concentration is computed from atmospherically corrected SSMIS brightness temperatures, using a combination of state-of-the-art algorithms. It is operational since 2005.
Data usedSSMIS (DMSP F17), ECMWF forecast for atmospheric correction (SSM/I before 19-01-2013)
FormatsHDF5, NetCDF, GRIB
NRT accessFTP (last 31 days in NetCDF3, HDF5 and GRIB) and EUMETCast (GRIB).
ArchiveFTP (since 2005) and EUMETSAT Data Center
DocumentationProduct User's Manual
LinksQuicklooks NH, Quicklooks SH, Validation & monitoring
RemarksN/A
OPERATIONAL Global Sea Ice Edges
TitleOSI-402-a: Sea Ice Edge Maps on 10 km Polar Stereographic Grid
DescriptionThe sea ice edge product from the EUMETSAT OSI SAF. Ice classes are assigned from atmospherically corrected SSMIS brightness temperatures and ASCAT backscatter values, using a Bayesian approach. It is operational since 2005.
Data usedSSMIS (DMSP F17), ASCAT (Metop-A), ECMWF forecast for atmospheric correction (SSM/I before 19-01-2013)
FormatsHDF5, NetCDF, GRIB
NRT accessFTP (last 31 days in NetCDF3, HDF5 and GRIB) and EUMETCast (GRIB).
ArchiveFTP (since 2005) and EUMETSAT Data Center
DocumentationProduct User's Manual
LinksQuicklooks NH, Quicklooks SH, Validation & monitoring
RemarksN/A
OPERATIONAL Global Sea Ice Types
TitleOSI-403-a: Sea Ice Type Maps on 10 km Polar Stereographic Grid
DescriptionThe sea ice type product from the EUMETSAT OSI SAF. Ice classes are assigned from atmospherically corrected SSMIS brightness temperatures and ASCAT backscatter values, using a Bayesian approach. It is operational since 2005.
Data usedSSMIS (DMSP F17), ASCAT (Metop-A), ECMWF forecast for atmospheric correction (SSM/I before 19-01-2013)
FormatsHDF5, NetCDF, GRIB
NRT accessFTP (last 31 days in NetCDF3, HDF5 and GRIB) and EUMETCast (GRIB).
ArchiveFTP (since 2005) and EUMETSAT Data Center
DocumentationProduct User's Manual
LinksQuicklooks NH, Quicklooks SH, Validation & monitoring
Remarks
Note that during Arctic summer season (May-September) the ice type product is dubious because melting of the ice surface obscures the ice type signals.
PRE-OPERATIONAL Sea Ice Emissivity
TitleOSI-404: The near 50GHz global sea ice emissivity
Description The sea ice surface emissivity is representative for the near 50 GHz channels used for temperature sounding of the atmosphere using satellite radiometers such as SSMIS and AMSU.
Data usedSSMIS brightness temperatures at 19v, 37v and 37h
FormatsNetCDF
NRT accessFTP (last 31 days in NetCDF)
ArchiveFTP (coming soon)
DocumentationProduct User's Manual, Validation Report, ATBD
LinksQuicklooks NH,Quicklooks SH (coming soon)
Remarks
  • The emissivity is combined with the surface effective temperature, sometimes called the skin temperature, in the radiative transfer equation. Model simulations indicate that the snow-ice interface temperature or alternatively the 6 GHz brightness temperature is a closer proxy for the 50 GHz effective temperature than the snow surface or air temperature
OPERATIONAL Low Resolution Sea Ice Drift

Zoom from map above
TitleOSI-405-a: Sea Ice Motion Maps with 48 hours span, on 62.5 km Polar Stereographic Grid
DescriptionThe low resolution sea ice drift product from the EUMETSAT OSI SAF. Ice motion vectors with a time span of 48 hours are estimated by an advanced cross-correlation method (the Continuous MCC, CMCC) on pairs of satellite images. Several single-sensor products are available, along with a merged (multi-sensor) dataset.
Data usedSSMIS (85 GHz, DMSP F17), ASCAT (Metop-A)
FormatsNetCDF3
NRT accessFTP (last 31 days in NetCDF)
ArchiveFTP (since December 2009), HTTP and OPENDAP (from October 2006 to December 2009)
DocumentationProduct User's Manual, Validation Report
LinksQuicklooks NH, Validation and Monitoring
Remarks
  • Due to high atmospheric Liquid Water Content and to ice surface melting, it is not possible to track ice motion during Arctic summer, from the channels we are processing. Accordingly, the NH product files distributed between 30th April and 1st October do not contain any valid vector. Similar, the SH product files distributed between 31st October and 1st April do not contain any valid vector.
Operational Medium Resolution Sea Ice Drift

Zoom from map above
TitleOSI-407: Sea Ice Motion Maps with 24 hours span, on 20.0 km Polar Stereographic Grid
DescriptionThe Medium resolution sea ice drift product from the EUMETSAT OSI SAF. Ice motion vectors with a time span of 24 hours are estimated by a maximum cross-correlation method (MCC) on pairs of satellite images. Input data are ~1km Infra Red or Visible data from the AVHRR instrument on board the METOP satellite.
Data usedAVHRR channel 2 and channel 4 (Metop-A VIS and TIR respectively)
FormatsNetCDF
NRT accessFTP (last 31 days in NetCDF)
ArchiveFTP (coming soon)
DocumentationProduct User's Manual, Validation Report
LinksQuicklooks NH (coming soon)
Remarks
  • Due to pronounced cloud cover during summer, and occasional during winter periods, the daily data coverage can be very sparse.
  • The mr ice drift production is based on TIR data during winter and VIS data during summer, with an overlapping period in spring and autumn.

Other Sea Ice Products

REPROC DATASET Global Sea Ice Concentration reprocessing dataset (1978-2015)
TitleOSI-409-a: Global Sea Ice Concentration reprocessing dataset (1978-2015)
DescriptionThe reprocessed sea ice concentration dataset of the EUMETSAT OSI SAF, covering the period from October 1978 to 15th April 2015 using passive microwave data (PMW) from the SMMR, SSM/I and SSMIS sensors. Ice concentration is computed from atmospherically corrected PMW brightness temperatures, using a combination of state-of-the-art algorithms and dynamic tie-points. The dataset includes error-bars for each grid cell (uncertainties). Version 1.1 covered the period Oct 1978-Oct 2009 (labelled OSI-409) and version 1.2 was extened with the period Oct 2009-Apr 2015 (labelled OSI-409-a).
Data usedSMMR, SSM/I and SSMIS, ECMWF re-analysis and forecast for atmospheric correction
FormatsNetCDF
Access DataFTP (whole dataset)
DocumentationProduct User's Manual, Validation report
LinksQuicklooks (single day), Quicklooks (compare 2 days)
Remarks

Use of this dataset should be acknowledged by referring to:
EUMETSAT Ocean and Sea Ice Satelitte Application Facility. Global sea ice concentration reprocessing dataset 1978-2015 (v1.2, 2015), [Online]. Norwegian and Danish Meteorological Institutes. Available from http://osisaf.met.no.

Offline Product Global Sea Ice Concentration continuous reprocessing offline product (2015-)
TitleOSI-430: Global Sea Ice Concentration continuous reprocessing offline product (2015-)
DescriptionThe continuous reprocessed sea ice concentration offline product of the EUMETSAT OSI SAF, covers the period from 16th April 2015 onwards using passive microwave data (PMW) SSMIS sensors. This product has been set up to continue the OSI-409-a product, with a monthly daily (33 days). Ice concentration is computed from atmospherically corrected PMW brightness temperatures, using a combination of state-of-the-art algorithms and dynamic tie-points. The product includes error-bars for each grid cell (uncertainties).
Data usedSSMIS, ECMWF re-analysis and forecast for atmospheric correction
FormatsNetCDF
Access DataFTP (whole dataset)
DocumentationProduct User's Manual, Validation report
Links Quicklooks coming August 2015
Remarks

Use of this product should be acknowledged by referring to:
EUMETSAT Ocean and Sea Ice Satelitte Application Facility. Global sea ice concentration continuous reprocessing offline product (year), [Online]. Norwegian and Danish Meteorological Institutes. Available from http://osisaf.met.no.

Contact

Contact person for OSI SAF Sea Ice products is Steinar Eastwood, met.no, osisaf-manager[at]met.no.

   
       
     

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