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Sea Ice Products
- Near-Real-Time products
- Climate Data Records
Near-Real-Time Sea Ice Products
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| OPERATIONAL |
Global Sea Ice Concentration |
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Title | OSI-401-b: SSMIS Sea Ice Concentration Maps on 10 km Polar Stereographic Grid |
| Description | The 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. |
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| Data used | SSMIS (DMSP F18), ECMWF forecast for atmospheric correction (SSM/I before 19-01-2013) |
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| Formats | NetCDF, GRIB and HDF5. Only NetCDF from September 2017. |
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| NRT access | FTP (last 31 days),
THREDDS and EUMETCast (GRIB). |
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| Archive | FTP (since 2005),
THREDDS and
EUMETSAT Data Center |
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| Documentation | Product User's Manual,
Validation report and
ATBD. |
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| Links | Quicklooks NH, Quicklooks SH,
Validation & monitoring |
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| Remarks | This product shall be referred to as: Sea ice concentration product of the EUMETSAT Ocean and Sea Ice
Satellite Application Facility (OSI SAF, www.osi-saf.org). |
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| OPERATIONAL |
AMSR-2 Global Sea Ice Concentration |
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Title | OSI-408: AMSR-2 Sea Ice Concentration Maps on 10 km Polar Stereographic Grid |
| Description |
The AMSR-2 sea ice concentration product from the EUMETSAT OSI SAF. Ice concentration is computed
from atmospherically corrected AMSR-2 brightness temperatures, using a combination of state-of-the-art algorithms.
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| Data used | AMSR-2 (Level-1B) data accessed via GCOM-W1 Data Providing Service, ECMWF forecast for atmospheric correction |
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| Formats | NetCDF |
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| NRT access | FTP (last 30 days),
THREDDS. |
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| Archive | FTP (since 2016),
THREDDS |
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| Documentation | Product User's Manual, Validation Report, ATBD |
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| Links | |
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| Remarks | This product shall be referred to as: AMSR-2 Sea ice concentration product of the EUMETSAT Ocean and Sea Ice
Satellite Application Facility (OSI SAF, www.osi-saf.org). |
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| OPERATIONAL |
Global Sea Ice Edges |
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Title | OSI-402-c: Sea Ice Edge Maps on 10 km Polar Stereographic Grid |
| Description | The 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.
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| Data used | SSMIS (DMSP F18), ASCAT (Metop-A), ECMWF forecast for atmospheric correction. |
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| Formats | NetCDF, GRIB, HDF5. Only NetCDF from September 2017. |
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| NRT access | FTP (last 31 days),
THREDDS and EUMETCast (GRIB). |
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| Archive | FTP (since 2005),
THREDDS and
EUMETSAT Data Center |
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| Documentation | Product User's Manual, Validation Report, ATBD |
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| Links | Quicklooks NH, Quicklooks SH,
Validation & monitoring |
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| Remarks |
- This product shall be referred to as: Sea ice edge product of the EUMETSAT Ocean and Sea Ice Satellite Application Facility (OSI SAF, www.osi-saf.org).
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| OPERATIONAL |
Global Sea Ice Types |
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Title | OSI-403-c: Sea Ice Type Maps on 10 km Polar Stereographic Grid |
| Description | The 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.
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| Data used | SSMIS (DMSP F18), ASCAT (Metop-A), ECMWF forecast for atmospheric correction |
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| Formats | NetCDF, GRIB, HDF5. Only NetCDF from September 2017. |
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| NRT access | FTP (last 31 days),
THREDDS and EUMETCast (GRIB). |
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| Archive | FTP (since 2005),
THREDDS and
EUMETSAT Data Center |
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| Documentation | Product User's Manual, Validation Report, ATBD |
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| Links | Quicklooks NH, Quicklooks SH,
Validation & monitoring |
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| 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. Similarly for SH, at present no ice type classification has been defined and SH product files do not contain valid classification. - This product shall be referred to as: Sea ice type product of the EUMETSAT Ocean and Sea Ice Satellite Application Facility (OSI SAF, www.osi-saf.org).
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| OPERATIONAL |
Sea Ice Emissivity |
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Title | OSI-404-a: 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.
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| Data used | SSMIS brightness temperatures at 19v, 37v and 37h. AMSR2 6v, 10v for effective temperature. |
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| Formats | NetCDF |
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| NRT access | FTP (last 31 days),
THREDDS and
EUMETCast |
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| Archive | FTP,
THREDDS and
EUMETSAT Data Center |
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| Documentation | Product User's Manual,
Validation Report,
ATBD |
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| Links | Quicklooks NH,Quicklooks SH |
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| 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
- This product shall be referred to as the near 50GHz sea ice emissivity product of the EUMETSAT Ocean and Sea Ice Satellite Application Facility (OSI SAF, www.osi-saf.org).
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| OPERATIONAL |
Low Resolution Sea Ice Drift |
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Zoom from map above |
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Title | OSI-405-c: Sea Ice Motion Maps with 48 hours span, on 62.5 km Polar Stereographic Grid |
| Description | The 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. Includes ice drift vectors in summer, and maps of uncertainties.
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| Data used | SSMIS (91 GHz, DMSP F17), ASCAT (Metop-B), AMSR-2 (18.7 and 36.5 GHz, GCOM-W1) |
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| Formats | NetCDF3 |
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| NRT access | FTP (last 31 days),
THREDDS and
EUMETCast |
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| Archive | FTP (since December 2009),
THREDDS,
EUMETSAT Data Center and
HTTP and OPENDAP (from October 2006 to December 2009) |
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| Documentation | Product User's Manual,
Validation Report and ATBD |
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| Links | Quicklooks NH,
Quicklooks SH,
Validation and Monitoring |
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| Remarks |
- Note that the sea ice drift vectors during summer (May-September in NH, November-May in SH) are processed from the 18.7 GHz imagery of JAXA's GCOM-W1 AMSR2 instrument. The summer motion fields are of lower accuracy and coverage than those processed during the winter season, and this is reflected in the new uncertainty fields. Pay attention to the increased number of interpolated vectors (in variable status_flag).
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| OPERATIONAL |
Medium Resolution Sea Ice Drift |
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Title | OSI-407: Sea Ice Motion Maps with 24 hours span, on 20.0 km Polar Stereographic Grid |
| Description | The 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.
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| Data used | AVHRR channel 2 and channel 4 (Metop-A VIS and TIR respectively) |
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| Formats | NetCDF |
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| NRT access | FTP (last 31 days),
THREDDS and
EUMETCast |
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| Archive | FTP,
THREDDS and
EUMETSAT Data Center
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| Documentation | Product User's Manual,
Validation Report |
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| Links | Quicklooks NH |
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| 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.
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| OPERATIONAL |
High Latitude L2 Sea and Ice Surface Temperature |
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Title | OSI-205: OSI SAF High Latitudes L2 Sea and Sea Ice Surface Temperature |
| Description | This product is a stand-alone High Latitude Level-2 Sea and Sea Ice Surface Temperature
product (SST and IST), based on Metop AVHRR data.
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| Data used | Metop AVHRR (PPS-2014), Ice Concentration (OSISAF), SST first guess (OSTIA), ECMWF NWP data |
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| Formats | NetCDF4 |
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| Access | FTP
EUMETCast: SAF-Europe channel, PID: 500, Multicast Address: 224.223.222.28 |
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| Documentation | Product User's Manual,
Validation report,
ATBD
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| Links | Not available |
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| Remarks |
- The output format comply to the GHRSST Data Format V2, GDS-V2
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Sea Ice Products for Climate Monitoring
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| DATA RECORD |
Global Sea Ice Concentration Climate Data Record v2 (1979-2015) |
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Title | OSI-450: Global Sea Ice Concentration Climate Data Record v2 |
| Description | This is the second version of the sea ice concentration climate data record of the EUMETSAT OSI SAF,
covering the period from January 1979 to December 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).
This CDR benefited from Research and Development activities in the ESA CCI projects.
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| Data used | SMMR, SSM/I and SSMIS from the EUMETSAT CM-SAF, ECMWF ERA-Interim |
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| Formats | NetCDF (netCDF-4 classic model) |
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| Access Data | FTP and
THREDDS |
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| Documentation | Product User's Manual,
Validation report, ATBD |
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| Links | Quicklooks (single day),
Quicklooks (compare 2 days) |
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| Remarks |
Use of this dataset should be acknowledged by referring to:
EUMETSAT Ocean and Sea Ice Satellite Application Facility.
Global sea ice concentration climate data record 1979-2015
(v2.0, 2017), [Online]. Norwegian and Danish Meteorological Institutes.
doi: 10.15770/EUM_SAF_OSI_0008 |
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| DATA RECORD |
Global Sea Ice Concentration Climate Data Records (1978-2015) |
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Title | OSI-409/OSI-409-a: Global Sea Ice Concentration Climate Data Records |
| Description | The sea ice concentration climate data records 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).
OSI-409 covers the period Oct 1978-Oct 2009 (also labelled version 1.1) and
OSI-409-a covers the period Oct 2009 to Apr 2015.
OSI-409 and OSI-409-a has been gathered as is available as version 1.2.
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| Data used | SMMR, SSM/I and SSMIS, ECMWF re-analysis and forecast for atmospheric correction |
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| Formats | NetCDF |
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| Access Data | FTP and
THREDDS |
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| Documentation | Product User's Manual,
Validation report,
ATBD |
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| Links | Quicklooks (single day),
Quicklooks (compare 2 days) |
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| Remarks |
Use of this dataset should be acknowledged by referring to:
EUMETSAT Ocean and Sea Ice Satelitte Application Facility. Global sea ice concentration climate data records 1978-2015
(v1.2, 2015), [Online]. Norwegian and Danish Meteorological Institutes. doi: 10.15770/EUM_SAF_OSI_0001 and 10.15770/EUM_SAF_OSI_0005 |
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| Offline Product |
Global Sea Ice Concentration continuous reprocessing offline product (2015-) |
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Title | OSI-430: Global Sea Ice Concentration continuous reprocessing offline product (2015-) |
| Description | The 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).
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| Data used | SSMIS, ECMWF re-analysis and forecast for atmospheric correction |
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| Formats | NetCDF |
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| Access Data | FTP and
THREDDS |
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| Documentation | Product User's Manual,
Validation report,
ATBD |
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| Links | Quicklooks (single day),
Quicklooks (compare 2 days) |
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| 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. |
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Contact
Contact person for OSI SAF Sea Ice products is Steinar Eastwood, met.no, osisaf-manager[at]met.no.
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