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PolarWatch ERDDAP
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| Dataset Title: | Sea Ice Concentration, AMSR2/VIIRS, Antarctic, 1km, Blended, UW-CIMSS, 2023- present, Daily 
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| Institution: | Cooperative Institute for Meteorological Studies, University of Wisconsin at Madison (Dataset ID: nesdis_blendedsic_shem_daily) |
| Information: | Summary
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| Metadata
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Attributes {
time {
UInt32 _ChunkSizes 524288;
String _CoordinateAxisType "Time";
Float64 actual_range 1.7029872e+9, 1.7320176e+9;
String axis "T";
String coverage_content_type "coordinate";
String ioos_category "Time";
String long_name "Time";
String standard_name "time";
String time_origin "01-JAN-1970 00:00:00";
String units "seconds since 1970-01-01T00:00:00Z";
}
cols {
UInt32 _ChunkSizes 8024;
String _CoordinateAxisType "GeoX";
Int32 actual_range -4012000, 4011000;
String axis "X";
String ioos_category "Location";
String long_name "Projection Grid X Coordinates";
String standard_name "projection_x_coordinate";
String units "meters";
}
rows {
UInt32 _ChunkSizes 8024;
String _CoordinateAxisType "GeoY";
Int32 actual_range -4012000, 4011000;
String axis "Y";
String ioos_category "Location";
String long_name "Projection Grid Y Coordinates";
String standard_name "projection_y_coordinate";
String units "meters";
}
IceConc {
UInt32 _ChunkSizes 1, 1003, 1003;
Int16 _FillValue 999;
Float64 colorBarMaximum 100.0;
Float64 colorBarMinimum 0.0;
String colorBarPalette "KT_ice";
String comment "UW-CIMSS Experimental Blended Sea Ice Concentration derived from AMSR2 (NASA TEAM-2) and VIIRS (NDE)";
String coordinates "time rows cols";
String coverage_content_type "physicalMeasurement";
String grid_mapping "crs";
String ioos_category "Ice Distribution";
String long_name "Sea Ice Concentration, Blended AMSR2 and VIIRS";
String standard_name "sea_ice_concentration";
String units "percent";
Int16 valid_range 0, 100;
}
NC_GLOBAL {
String _NCProperties "version=2,netcdf=4.8.1,hdf5=1.10.6";
String cdm_data_type "Grid";
String cdr_program "NOAA National Environmental Satellite, Data and Information Service";
String cdr_variable "fcdr_sea_ice_concentration_percentage";
String Conventions "CF-1.6, ACDD-1.3, NOAA CDR v1.0, GDS v2.0, COARDS";
String creator_email "rdworak@ssec.wisc.edu";
String creator_name "Richard J. Dworak";
String creator_type "institution";
String creator_url "stratus.ssec.wisc.edu";
String date_created "2024-11-20";
String defaultGraphQuery "IceConc[(last)]&.draw=surface";
String grid_mapping_comment "Data is stored in 1 km EASE2-Grid. Refer to https://nsidc.org/data/user-resources/help-center/guide-ease-grids";
Int16 grid_mapping_epsg_code 6932;
String grid_mapping_latitude_of_projection_origin "-90.0f";
String grid_mapping_longitude_of_projection_origin "0.0f";
String grid_mapping_name "lambert_azimuthal_equal_area";
String grid_mapping_proj4text "+proj=laea +lat_0=-90 +lon_0=0 +x_0=0 +y_0=0 +datum=WGS84 +units=m +no_defs +type=crs";
String grid_mapping_spatial_ref "PROJCS[\"WGS 84 / NSIDC EASE-Grid 2.0 South\",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\",\"6932\"]]";
String grid_mapping_srid "urn:ogc:def:crs:EPSG::6932";
String grid_mappingearth_radius "6371228.0f";
String grid_mappingfalse_easting "0.0f";
String grid_mappingfalse_northing "0.0f";
String history
"2024-11-21T09:07:06Z (local files)
2024-11-21T09:07:06Z https://polarwatch.noaa.gov/erddap/griddap/nesdis_blendedsic_shem_daily.das";
String id "Polar-AMSR2VIIRSBLEND_j01_v01r00_Shem";
String infoUrl "https://www.mdpi.com/2072-4292/13/15/2982";
String infourl "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";
String institution "Cooperative Institute for Meteorological Studies, University of Wisconsin at Madison";
String keywords "amsr2, antarctic, blended, cimss, cols, concentration, cooperative, cryosphere, data, distribution, earth, Earth Science > Blended Product > Amsr2 > Viirs, Earth Science > Cryosphere > Sea Ice > Sea Ice Concentration, ice, ice distribution, IceConc, imager, imager/radiometer, imaging, infrared, institute, madison, meteorological, product, radiometer, rows, science, sea, sea_ice_concentration, studies, suite, time, university, uw-cimss, viirs, visible, wisconsin";
String keywords_vocabulary "GCMD Science Keywords";
String license "These data may be redistributed and used without restriction.";
String metadata_link "https://www.star.nesdis.noaa.gov/jpss/documents/ATBD/ATBD_EPS_Cloud_Mask_v1.2.pdf";
String nameing_authority "ssec.wisc.edu";
String platform "NOAA21 and GCOM-W1";
String processing_level "L3 Mapped";
String product_version "v1.0";
String proj4_string "WGS84";
String proj_crs_code "EPSG:6932";
String references "https://www.mdpi.com/2072-4292/13/15/2982";
String sensor "Visible Infrared Imaging Radiometer Suite (VIIRS) and The Advanced Microwave Scanning Radiometer 2 (AMSR2)";
String source "AMSR2 and VIIRS";
String sourceUrl "(local files)";
String spatial_resolution "1 km";
String standard_name_vocabulary "CF Standard Name Table v36";
String summary "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).";
String time_coverage_duration "P1D";
String time_coverage_end "2024-11-19T12:00:00Z";
String time_coverage_resolution "P1D";
String time_coverage_start "2023-12-19T12:00:00Z";
String title "Sea Ice Concentration, AMSR2/VIIRS, Antarctic, 1km, Blended, UW-CIMSS, 2023-present, Daily";
}
}
Data Access Protocol (DAP) and its
projection constraints.
The URL specifies what you want: the dataset, a description of the graph or the subset of the data, and the file type for the response.
griddap request URLs must be in the form
https://coastwatch.pfeg.noaa.gov/erddap/griddap/datasetID.fileType{?query}
For example,
https://coastwatch.pfeg.noaa.gov/erddap/griddap/jplMURSST41.htmlTable?analysed_sst[(2002-06-01T09:00:00Z)][(-89.99):1000:(89.99)][(-179.99):1000:(180.0)]
Thus, the query is often a data variable name (e.g., analysed_sst),
followed by [(start):stride:(stop)]
(or a shorter variation of that) for each of the variable's dimensions
(for example, [time][latitude][longitude]).
For details, see the griddap Documentation.