Dataset: Sea Ice Concentration Climate Data Record Version 3 (SMMR, SSM/I, and SSMIS) from the EUMETSAT OSI SAF#
Dataset identifier: OSISAF-GLO-SEAICE_CONC_TIMESERIES-NH-LA-OBS
Data store: cmems
How to open this dataset in AVL JupyterLab
cmems_store = new_data_store('cmems')
ds = cmems_store.open_data('OSISAF-GLO-SEAICE_CONC_TIMESERIES-NH-LA-OBS')
Basic information#
cmems_store = new_data_store('cmems')
ds = cmems_store.open_data('OSISAF-GLO-SEAICE_CONC_TIMESERIES-NH-LA-OBS')
| Parameter | Value |
|---|---|
| Bounding box longitude (°) | -5400 to 5400 |
| Bounding box latitude (°) | -5400 to 5400 |
| Time range | 1978-10-25 to 2020-12-31 |
Click here for full dataset metadata.
Variable list#
Click on a variable name to jump to the variable’s full metadata.
| Variable | Long name | Units |
|---|---|---|
| Lambert_Azimuthal_Grid | [none] | [none] |
| algorithm_standard_uncertainty | algorithm uncertainty (one standard deviation) of concentration of sea ice | % |
| ice_conc | fully filtered concentration of sea ice using atmospheric correction of brightness temperatures and open water filters | % |
| raw_ice_conc_values | sea ice concentration estimates as retrieved by the algorithm, and that were edited away by the various filters | % |
| smearing_standard_uncertainty | smearing uncertainty (one standard deviation) of concentration of sea ice | % |
| status_flag | status flag bit array for sea ice concentration retrievals | [none] |
| total_standard_uncertainty | total uncertainty (one standard deviation) of concentration of sea ice | % |
Full variable metadata#
Lambert_Azimuthal_Grid#
| Field | Value |
|---|---|
| latitude_of_projection_origin | 90.0 |
| false_easting | 0.0 |
| false_northing | 0.0 |
| semi_major_axis | 6378137.0 |
| inverse_flattening | 298.257223563 |
| proj4_string | +proj=laea +lon_0=0 +datum=WGS84 +ellps=WGS84 +lat_0=90.0 |
| grid_mapping_name | lambert_azimuthal_equal_area |
| longitude_of_projection_origin | 0.0 |
algorithm_standard_uncertainty#
| Field | Value |
|---|---|
| comment | this is one of the two components contributing to 'total_standard_uncertainty' |
| grid_mapping | Lambert_Azimuthal_Grid |
| long_name | algorithm uncertainty (one standard deviation) of concentration of sea ice |
| units | % |
ice_conc#
| Field | Value |
|---|---|
| long_name | fully filtered concentration of sea ice using atmospheric correction of brightness temperatures and open water filters |
| standard_name | sea_ice_area_fraction |
| units | % |
| valid_min | 0 |
| valid_max | 10000 |
| grid_mapping | Lambert_Azimuthal_Grid |
| ancillary_variables | total_standard_uncertainty status_flag |
| comment | this field is the primary sea ice concentration estimate for this climate data record |
raw_ice_conc_values#
| Field | Value |
|---|---|
| comment | this field can be used in combination with 'ice_conc' to access un-bounded normal distribution of sea ice concentration estimates corresponding to the uncertainty estimate in 'total_standard_uncertainty'. It does also feature some amount of un-physical data (below 0% and above 100%). |
| units | % |
| grid_mapping | Lambert_Azimuthal_Grid |
| long_name | sea ice concentration estimates as retrieved by the algorithm, and that were edited away by the various filters |
smearing_standard_uncertainty#
| Field | Value |
|---|---|
| comment | this is one of the two components contributing to 'total_standard_uncertainty' |
| long_name | smearing uncertainty (one standard deviation) of concentration of sea ice |
| grid_mapping | Lambert_Azimuthal_Grid |
| units | % |
status_flag#
| Field | Value |
|---|---|
| long_name | status flag bit array for sea ice concentration retrievals |
| standard_name | sea_ice_area_fraction status_flag |
| valid_min | 0 |
| valid_max | 32767 |
| grid_mapping | Lambert_Azimuthal_Grid |
| flag_masks | 1, 2, 4, 8, 16, 32, 64, 128 |
| flag_meanings | land lake open_water_filtered land_spill_over high_t2m spatial_interp temporal_interp max_ice_climo |
| flag_descriptions | all bits to 0 (flag 0): Nominal retrieval by the SIC algorithm bit 1 (flag 1): Position is over land bit 2 (flag 2): Position is lake bit 3 (flag 4): SIC is set to zero by the open water filter bit 4 (flag 8): SIC value is changed for correcting land spill-over effects bit 5 (flag 16): Handle with caution, the 2m air temperature is high at this position, and this might be false ice bit 6 (flag 32): Value is the result of spatial interpolation bit 7 (flag 64): Value is the result of temporal interpolation bit 8 (flag 128): SIC is set to zero since position is outside maximum sea ice climatology. |
| comment | Flag values found in the map might be combinations of those listed above. For example flag value 80 (= 2^4 + 2^6 = 16 + 64) indicates high_t2m AND temporal_interp |
total_standard_uncertainty#
| Field | Value |
|---|---|
| grid_mapping | Lambert_Azimuthal_Grid |
| units | % |
| long_name | total uncertainty (one standard deviation) of concentration of sea ice |
| standard_name | sea_ice_area_fraction standard_error |
Full dataset metadata#
| Field | Value |
|---|---|
| title | Sea Ice Concentration Climate Data Record Version 3 (SMMR, SSM/I, and SSMIS) from the EUMETSAT OSI SAF |
| summary | This climate data record of sea ice concentration is obtained from coarse resolution passive microwave satellite data (SMMR, SSM/I, and SSMIS) over the polar regions (Arctic and Antarctic). The processing chain features: 1) dynamic tuning of tie-points and algorithms, 2) correction of atmospheric noise using a Radiative Transfer Model, 3) computation of per-pixel uncertainties, and 4) an optimal hybrid sea ice concentration algorithm. This dataset was generated by the EUMETSAT Ocean and Sea Ice Satellite Application Facility (OSI SAF). The ESA CCI Programme contributed with Research and Development on the algorithms. |
| topiccategory | Oceans ClimatologyMeteorologyAtmosphere |
| geospatial_lat_min | 16.62393 |
| geospatial_lat_max | 90.0 |
| geospatial_lon_min | -180.0 |
| geospatial_lon_max | 180.0 |
| geospatial_vertical_min | 0.0 |
| geospatial_vertical_max | 0.0 |
| sensor | SMMR,SSM/I,SSMIS |
| platform | Nimbus-7,DMSP-F<08,10,11,13,14,15>,DMSP-F<16,17,18> |
| time_coverage_start | 2020-12-31T00:00:00Z |
| time_coverage_end | 2021-01-01T00:00:00Z |
| time_coverage_duration | P1D |
| time_coverage_resolution | P1D |
| project | OSI SAF - EUMETSAT |
| institution | OSISAF - EUMETSAT |
| creator_name | OSISAF - EUMETSAT |
| creator_type | institution |
| creator_url | https://osi-saf.eumetsat.int/ |
| creator_email | osi-saf.helpdesk@meteo.fr |
| license | All intellectual property rights of the Ocean and Sea Ice SAF products belong to EUMETSAT. The use of these products is granted to every user, free of charge. If users wish to use these products, EUMETSAT's copyright credit must be shown by displaying the words 'Copyright EUMETSAT' under each of the products shown. EUMETSAT offers no warranty and accepts no liability in respect of the Ocean and Sea Ice SAF products. EUMETSAT neither commits to nor guarantees the continuity, availability, or quality or suitability for any purpose of, the Ocean and Sea Ice SAF products. |
| references | Product User Manual v3.0 (2022),Algorithm Theoretical Basis Document v2.2 (2022),https://osi-saf.eumetsat.int/products/osi-450-a |
| history | 2022-06-08T13:02:29Z creation |
| date_created | 2022-06-08 |
| cdm_data_type | Grid |
| spatial_resolution | 25.0 km grid spacing |
| geospatial_bounds_crs | EPSG:6931 |
| product_version | 3.0 |
| tracking_id | 8d7faebb-f1e2-497a-9a0f-22268b2ecca3 |
| naming_authority | int.eumetsat |
| standard_name_vocabulary | CF Standard Name Table (Version 78, 21 September 2021) |
| product_id | osi-450-a |
| product_name | osi_saf_sea_ice_conc_climate_data_record_smmrssmissmis |
| doi | 10.15770/EUM_SAF_OSI_0013 |
| contributor_name | Thomas Lavergne,Atle Soerensen,Rasmus Tonboe,Courtenay Strong,Matilde Kreiner,Roberto Saldo,Anton Birkedal,Steinar Eastwood |
| contributor_role | PrincipalInvestigator,author,author,author,author,author,author,author |
| keywords | GCMDSK:Earth Science > Cryosphere > Sea Ice > Sea Ice Concentration, GCMDSK:Earth Science > Oceans > Sea Ice > Sea Ice Concentration, GCMDSK:Earth Science > Climate Indicators > Cryospheric Indicators > Sea Ice Concentration, GCMDLOC:Geographic Region > Northern Hemisphere, GCMDLOC:Vertical Location > Sea Surface, GCMDPROV: Government Agencies-non-US > Norway > NO/MET > Norwegian Meteorological Institute |
| keywords_vocabulary | GCMDSK:GCMD Science Keywords:https://gcmd.earthdata.nasa.gov/kms/concepts/concept_scheme/sciencekeywords, GCMDPROV:GCMD Providers:https://gcmd.earthdata.nasa.gov/kms/concepts/concept_scheme/providers, GCMDLOC:GCMD Locations:https://gcmd.earthdata.nasa.gov/kms/concepts/concept_scheme/locations |
| Conventions | CF-1.7,ACDD-1.3 |
| algorithm | SICCI3LF (19V, 37V, 37H) |
| source | FCDR of SMMR / SSMI / SSMIS Brightness Temperatures R4 from EUMETSAT Climate Monitoring SAF (doi:10.5676/EUM_SAF_CM/FCDR_MWI/V004), ERA5 |