Ocean and Sea Ice SAF ...

Ocean and Sea Ice SAF

http://saf.met.no/p/ice/

Sea Ice Products

• Near-Real-Time products
• Global Sea Ice Concentration
• AMSR-2 Global Sea Ice Concentration
• Global Sea Ice Edges
• Global Sea Ice Types
• Sea Ice Emissivity
• Low Resolution Sea Ice Drift
• Medium Resolution Sea Ice Drift
• High Latitude L2 Sea and Ice Surface Temperature
• Climate Data Records
• Global Sea Ice Concentration Climate Data Record v2
• Global Sea Ice Concentration Climate Data Record v1
• Global Sea Ice Concentration continuous reprocessing product v1
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Near-Real-Time Sea Ice Products

OPERATIONAL Global Sea Ice Concentration 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. >> access more details Data used SSMIS (DMSP F18), ECMWF forecast for atmospheric correction (SSM/I before 19-01-2013) Formats NetCDF, GRIB and HDF5. Only NetCDF from September 2017. NRT access FTP (last 31 days), THREDDS and EUMETCast (GRIB). Archive FTP (since 2005), THREDDS and EUMETSAT Data Center Documentation Product User's Manual, Validation report and ATBD. Links Quicklooks NH, Quicklooks SH, Validation & monitoring 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).

OPERATIONAL AMSR-2 Global Sea Ice Concentration 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. >> access more details Data used AMSR-2 (Level-1B) data accessed via GCOM-W1 Data Providing Service, ECMWF forecast for atmospheric correction Formats NetCDF NRT access FTP (last 30 days), THREDDS. Archive FTP (since 2016), THREDDS Documentation Product User's Manual, Validation Report, ATBD Links 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).

OPERATIONAL Global Sea Ice Edges 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. >> access more details Data used SSMIS (DMSP F18), ASCAT (Metop-A), ECMWF forecast for atmospheric correction. Formats NetCDF, GRIB, HDF5. Only NetCDF from September 2017. NRT access FTP (last 31 days), THREDDS and EUMETCast (GRIB). Archive FTP (since 2005), THREDDS and EUMETSAT Data Center Documentation Product User's Manual, Validation Report, ATBD Links Quicklooks NH, Quicklooks SH, Validation & monitoring 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).

OPERATIONAL Global Sea Ice Types 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. >> access more details Data used SSMIS (DMSP F18), ASCAT (Metop-A), ECMWF forecast for atmospheric correction Formats NetCDF, GRIB, HDF5. Only NetCDF from September 2017. NRT access FTP (last 31 days), THREDDS and EUMETCast (GRIB). Archive FTP (since 2005), THREDDS and EUMETSAT Data Center Documentation Product User's Manual, Validation Report, ATBD Links Quicklooks 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. 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).

OPERATIONAL Sea Ice Emissivity Title OSI-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. >> access more details Data used SSMIS brightness temperatures at 19v, 37v and 37h Formats NetCDF NRT access FTP (last 31 days), THREDDS and EUMETCast Archive FTP, THREDDS and EUMETSAT Data Center Documentation Product User's Manual, Validation Report, ATBD Links Quicklooks NH,Quicklooks SH 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).

OPERATIONAL Low Resolution Sea Ice Drift Zoom from map above 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. >> access more details Data used SSMIS (91 GHz, DMSP F17), ASCAT (Metop-B), AMSR-2 (18.7 and 36.5 GHz, GCOM-W1) Formats NetCDF3 NRT access FTP (last 31 days), THREDDS and EUMETCast Archive FTP (since December 2009), THREDDS, EUMETSAT Data Center and HTTP and OPENDAP (from October 2006 to December 2009) Documentation Product User's Manual, Validation Report and ATBD Links Quicklooks NH, Quicklooks SH, Validation and Monitoring 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).

OPERATIONAL Medium Resolution Sea Ice Drift 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. >> access more details Data used AVHRR channel 2 and channel 4 (Metop-A VIS and TIR respectively) Formats NetCDF NRT access FTP (last 31 days), THREDDS and EUMETCast Archive FTP, THREDDS and EUMETSAT Data Center  Documentation Product User's Manual, Validation Report Links Quicklooks NH 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.

OPERATIONAL High Latitude L2 Sea and Ice Surface Temperature 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. >>access more details Data used Metop AVHRR (PPS-2014), Ice Concentration (OSISAF), SST first guess (OSTIA), ECMWF NWP data Formats NetCDF4 Access FTP EUMETCast: SAF-Europe channel, PID: 500, Multicast Address: 224.223.222.28 Documentation Product User's Manual, Validation report, ATBD Links Not available Remarks The output format comply to the GHRSST Data Format V2, GDS-V2

Sea Ice Products for Climate Monitoring

DATA RECORD Global Sea Ice Concentration Climate Data Record v2 (1979-2015) 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. >> access more details Data used SMMR, SSM/I and SSMIS from the EUMETSAT CM-SAF, ECMWF ERA-Interim Formats NetCDF (netCDF-4 classic model) Access Data FTP and THREDDS Documentation Product User's Manual, Validation report, ATBD Links Quicklooks (single day), Quicklooks (compare 2 days) 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

DATA RECORD Global Sea Ice Concentration Climate Data Records (1978-2015) 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. >> access more details Data used SMMR, SSM/I and SSMIS, ECMWF re-analysis and forecast for atmospheric correction Formats NetCDF Access Data FTP and THREDDS Documentation Product User's Manual, Validation report, ATBD Links Quicklooks (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 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

Offline Product Global Sea Ice Concentration continuous reprocessing offline product (2015-) 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). >> access more details Data used SSMIS, ECMWF re-analysis and forecast for atmospheric correction Formats NetCDF Access Data FTP and THREDDS Documentation Product User's Manual, Validation report, ATBD Links Quicklooks (single day), Quicklooks (compare 2 days) 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.

http://saf.met.no/p/ice/