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| Grid DAP Data | Sub- set | Table DAP Data | Make A Graph | W M S | Source Data Files | Acces- sible
| Title | Sum- mary | FGDC, ISO, Metadata | Back- ground Info | RSS | E | Institution | Dataset ID | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| data | graph | files | public | Sea Ice Concentration, AMSR2/VIIRS, Arctic, 1km, Blended, UW-CIMSS, 2023-present, Daily |
| M | background
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| nesdis_blendedsic_nhem_daily |
| Row Type | Variable Name | Attribute Name | Data Type | Value |
|---|---|---|---|---|
| attribute | NC_GLOBAL | _NCProperties | String | version=2,netcdf=4.8.1,hdf5=1.10.7 |
| attribute | NC_GLOBAL | cdm_data_type | String | Grid |
| attribute | NC_GLOBAL | cdr_program | String | NOAA National Environmental Satellite, Data and Information Service |
| attribute | NC_GLOBAL | cdr_variable | String | fcdr_sea_ice_concentration_percentage |
| attribute | NC_GLOBAL | Conventions | String | CF-1.6, ACDD-1.3, NOAA CDR v1.0, GDS v2.0, COARDS |
| attribute | NC_GLOBAL | creator_email | String | rdworak at ssec.wisc.edu |
| attribute | NC_GLOBAL | creator_name | String | Richard J. Dworak |
| attribute | NC_GLOBAL | creator_type | String | institution |
| attribute | NC_GLOBAL | creator_url | String | stratus.ssec.wisc.edu |
| attribute | NC_GLOBAL | date_created | String | 2025-01-09 |
| attribute | NC_GLOBAL | defaultGraphQuery | String | IceConc[(last)]&.draw=surface |
| attribute | NC_GLOBAL | grid_mapping_comment | String | Data is stored in 1 km EASE2-Grid. Refer to https://nsidc.org/data/user-resources/help-center/guide-ease-grids |
| attribute | NC_GLOBAL | grid_mapping_epsg_code | short | 6931 |
| attribute | NC_GLOBAL | grid_mapping_latitude_of_projection_origin | String | 90.0f |
| attribute | NC_GLOBAL | grid_mapping_longitude_of_projection_origin | String | 0.0f |
| attribute | NC_GLOBAL | grid_mapping_name | String | lambert_azimuthal_equal_area |
| attribute | NC_GLOBAL | grid_mapping_proj4text | String | +proj=laea +lat_0=90 +lon_0=0 +x_0=0 +y_0=0 +datum=WGS84 +units=m +no_defs +type=crs |
| attribute | NC_GLOBAL | grid_mapping_spatial_ref | String | PROJCS["WGS 84 / NSIDC EASE-Grid 2.0 North",GEOGCS["WGS 84",DATUM["WGS_1984",SPHEROID["WGS 84",6378137,298.257223563,AUTHORITY["EPSG","7030"]],AUTHORITY["EPSG","6326"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4326"]],PROJECTION["Lambert_Azimuthal_Equal_Area"],PARAMETER["latitude_of_center",90],PARAMETER["longitude_of_center",0],PARAMETER["false_easting",0],PARAMETER["false_northing",0],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AUTHORITY["EPSG","6931"]] |
| attribute | NC_GLOBAL | grid_mapping_srid | String | urn:ogc:def:crs:EPSG::6931 |
| attribute | NC_GLOBAL | grid_mappingearth_radius | String | 6378137.0f |
| attribute | NC_GLOBAL | grid_mappingfalse_easting | String | 0.0f |
| attribute | NC_GLOBAL | grid_mappingfalse_northing | String | 0.0f |
| attribute | NC_GLOBAL | id | String | Polar-AMSR2VIIRSBLEND_j01_v01r00_Nhem |
| attribute | NC_GLOBAL | infoUrl | String | https://www.mdpi.com/2072-4292/13/15/2982 |
| attribute | NC_GLOBAL | infourl | String | https://www.ospo.noaa.gov/Products/Suites/files/atbd/ATBD_IceSurfaceTemperatureIceConcentration_v1.0.pdf and https://ntrs.nasa.gov/api/citations/20140017491/downloads/20140017491.pdf |
| attribute | NC_GLOBAL | institution | String | Cooperative Institute for Meteorological Studies, University of Wisconsin at Madison |
| attribute | NC_GLOBAL | keywords | String | Earth Science > Blended Product > Amsr2 > Viirs, Earth Science > Cryosphere > Sea Ice > Sea Ice Concentration |
| attribute | NC_GLOBAL | keywords_vocabulary | String | GCMD Science Keywords |
| attribute | NC_GLOBAL | license | String | These data may be redistributed and used without restriction. |
| attribute | NC_GLOBAL | metadata_link | String | https://www.star.nesdis.noaa.gov/jpss/documents/ATBD/ATBD_EPS_Cloud_Mask_v1.2.pdf |
| attribute | NC_GLOBAL | nameing_authority | String | ssec.wisc.edu |
| attribute | NC_GLOBAL | platform | String | NOAA21 and GCOM-W1 |
| attribute | NC_GLOBAL | processing_level | String | L3 Mapped |
| attribute | NC_GLOBAL | product_version | String | v1.0 |
| attribute | NC_GLOBAL | proj4_string | String | WGS84 |
| attribute | NC_GLOBAL | proj_crs_code | String | EPSG:6931 |
| attribute | NC_GLOBAL | references | String | https://www.mdpi.com/2072-4292/13/15/2982 |
| attribute | NC_GLOBAL | sensor | String | Visible Infrared Imaging Radiometer Suite and The Advanced Microwave Scanning Radiometer 2 |
| attribute | NC_GLOBAL | source | String | AMSR2 and VIIRS |
| attribute | NC_GLOBAL | sourceUrl | String | (local files) |
| attribute | NC_GLOBAL | spatial_resolution | String | 1 km |
| attribute | NC_GLOBAL | standard_name_vocabulary | String | CF Standard Name Table v36 |
| attribute | NC_GLOBAL | summary | String | This is a Blended Sea Ice Concentration product that combines clear-sky Visible and Infrared Imager/Radiometer Suite (VIIRS) ice concentration from NOAA-20 with that comes from the AMSR2 NASA Team-2 10 km product. The output is remapped into 1-km EASE2 grid cells with a nominal resolution of at least 5-km. The NDE cloud mask is used to screen out cloudy VIIRS pixels. When the cloud mask for a data point is determined to be confidently clear, the output concentration in the blended product is 100% VIIRS. Otherwise, the Best Linear Unbiased Estimator equation is used to determine the output concentration (see https://www.sciencedirect.com/topics/mathematics/linear-unbiased-estimator#:~:text=Under%20assumptions%20V%20and%20VI,(Gauss%E2%80%93Markov%20theorem for more information on method). |
| attribute | NC_GLOBAL | time_coverage_duration | String | P1D |
| attribute | NC_GLOBAL | time_coverage_end | String | 2025-01-13T12:00:00Z |
| attribute | NC_GLOBAL | time_coverage_resolution | String | P1D |
| attribute | NC_GLOBAL | time_coverage_start | String | 2023-12-19T12:00:00Z |
| attribute | NC_GLOBAL | title | String | Sea Ice Concentration, AMSR2/VIIRS, Arctic, 1km, Blended, UW-CIMSS, 2023-present, Daily |
| dimension | time | double | nValues=370, evenlySpaced=false, averageSpacing=1 day 1h 25m 51s | |
| attribute | time | _ChunkSizes | uint | 524288 |
| attribute | time | _CoordinateAxisType | String | Time |
| attribute | time | actual_range | double | 1.7029872E9, 1.7367696E9 |
| attribute | time | axis | String | T |
| attribute | time | coverage_content_type | String | coordinate |
| attribute | time | ioos_category | String | Time |
| attribute | time | long_name | String | Time |
| attribute | time | standard_name | String | time |
| attribute | time | time_origin | String | 01-JAN-1970 00:00:00 |
| attribute | time | units | String | seconds since 1970-01-01T00:00:00Z |
| dimension | cols | int | nValues=9024, evenlySpaced=true, averageSpacing=1000.0 | |
| attribute | cols | _ChunkSizes | uint | 9024 |
| attribute | cols | _CoordinateAxisType | String | GeoX |
| attribute | cols | actual_range | int | -4512000, 4511000 |
| attribute | cols | axis | String | X |
| attribute | cols | ioos_category | String | Location |
| attribute | cols | long_name | String | Projection Grid X Coordinates |
| attribute | cols | standard_name | String | projection_x_coordinate |
| attribute | cols | units | String | meters |
| dimension | rows | int | nValues=9024, evenlySpaced=true, averageSpacing=1000.0 | |
| attribute | rows | _ChunkSizes | uint | 9024 |
| attribute | rows | _CoordinateAxisType | String | GeoY |
| attribute | rows | actual_range | int | -4512000, 4511000 |
| attribute | rows | axis | String | Y |
| attribute | rows | ioos_category | String | Location |
| attribute | rows | long_name | String | Projection Grid Y Coordinates |
| attribute | rows | standard_name | String | projection_y_coordinate |
| attribute | rows | units | String | meters |
| variable | IceConc | float | time, cols, rows | |
| attribute | IceConc | _ChunkSizes | uint | 4294967295 |
| attribute | IceConc | _FillValue | float | 999.0 |
| attribute | IceConc | colorBarMaximum | double | 100.0 |
| attribute | IceConc | colorBarMinimum | double | 0.0 |
| attribute | IceConc | colorBarPalette | String | KT_ice |
| attribute | IceConc | comment | String | UW-CIMSS Experimental Blended Sea Ice Concentration derived from AMSR2 (NASA TEAM-2) and VIIRS (NDE) |
| attribute | IceConc | coordinates | String | time rows cols |
| attribute | IceConc | coverage_content_type | String | physicalMeasurement |
| attribute | IceConc | grid_mapping | String | crs |
| attribute | IceConc | ioos_category | String | Ice Distribution |
| attribute | IceConc | long_name | String | Sea Ice Concentration, Blended AMSR2 and VIIRS |
| attribute | IceConc | standard_name | String | sea_ice_concentration |
| attribute | IceConc | units | String | percent |
| attribute | IceConc | valid_range | float | 0.0, 100.0 |
The information in the table above is also available in other file formats (.csv, .htmlTable, .itx, .json, .jsonlCSV1, .jsonlCSV, .jsonlKVP, .mat, .nc, .nccsv, .tsv, .xhtml) via a RESTful web service.