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Dataset Title: | Sea Ice Concentration, AMSR2/VIIRS, Arctic, 1km, Blended, UW-CIMSS, 2023- present, Daily |
Institution: | Cooperative Institute for Meteorological Studies, University of Wisconsin at Madison (Dataset ID: nesdis_blendedsic_nhem_daily) |
Information: | Summary | License | Metadata | Background | Files | Make a graph |
Attributes { time { UInt32 _ChunkSizes 524288; String _CoordinateAxisType "Time"; Float64 actual_range 1.7029872e+9, 1.7333136e+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 9024; String _CoordinateAxisType "GeoX"; Int32 actual_range -4512000, 4511000; 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 9024; String _CoordinateAxisType "GeoY"; Int32 actual_range -4512000, 4511000; 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 4294967295; Float32 _FillValue 999.0; 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"; Float32 valid_range 0.0, 100.0; } NC_GLOBAL { String _NCProperties "version=2,netcdf=4.8.1,hdf5=1.10.7"; 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 "2024-12-02"; 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 6931; 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 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\"]]"; String grid_mapping_srid "urn:ogc:def:crs:EPSG::6931"; String grid_mappingearth_radius "6378137.0f"; String grid_mappingfalse_easting "0.0f"; String grid_mappingfalse_northing "0.0f"; String history "2024-12-06T07:27:43Z (local files) 2024-12-06T07:27:43Z https://polarwatch.noaa.gov/erddap/griddap/nesdis_blendedsic_nhem_daily.das"; String id "Polar-AMSR2VIIRSBLEND_j01_v01r00_Nhem"; 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 "Earth Science > Blended Product > Amsr2 > Viirs, Earth Science > Cryosphere > Sea Ice > Sea Ice Concentration"; 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:6931"; String references "https://www.mdpi.com/2072-4292/13/15/2982"; String sensor "Visible Infrared Imaging Radiometer Suite and The Advanced Microwave Scanning Radiometer 2"; 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 "2024-12-04T12:00:00Z"; String time_coverage_resolution "P1D"; String time_coverage_start "2023-12-19T12:00:00Z"; String title "Sea Ice Concentration, AMSR2/VIIRS, Arctic, 1km, Blended, UW-CIMSS, 2023-present, Daily"; } }
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.