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 data       graph     files  public Sea Ice Concentration, NOAA/NSIDC Climate Data Record V5, Northern Hemisphere, 25km, Science
Quality, 1978-Present, Daily
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nsidcG02202v5nh1day

The Dataset's Variables and Attributes

Row Type Variable Name Attribute Name Data Type Value
attribute NC_GLOBAL _NCProperties String version=2,netcdf=4.8.1,hdf5=1.10.6
attribute NC_GLOBAL acknowledgement String This project was supported in part by a grant from the NOAA Climate Data Record Program. The NASA Team and Bootstrap sea ice concentration algorithms were developed by Donald J. Cavalieri, Josefino C. Comiso, Claire L. Parkinson, and others at the NASA Goddard Space Flight Center in Greenbelt, MD.
attribute NC_GLOBAL acknowledgment String This project was supported in part by a grant from the NOAA Climate Data Record Program. The NASA Team and Bootstrap sea ice concentration algorithms were developed by Donald J. Cavalieri, Josefino C. Comiso, Claire L. Parkinson, and others at the NASA Goddard Space Flight Center in Greenbelt, MD.
attribute NC_GLOBAL cdm_data_type String Grid
attribute NC_GLOBAL cdr_data_type String grid
attribute NC_GLOBAL contributor_name String Walter N. Meier, Florence Fetterer, Ann Windnagel, J. Scott Stewart, Trey Stafford
attribute NC_GLOBAL contributor_role String principal investigator, author, author, software developer, software developer
attribute NC_GLOBAL Conventions String CF-1.11, ACDD-1.3
attribute NC_GLOBAL creator_email String nsidc at nsidc.org
attribute NC_GLOBAL creator_name String NSIDC/NOAA
attribute NC_GLOBAL creator_type String institution
attribute NC_GLOBAL creator_url String https://nsidc.org/ (external link)
attribute NC_GLOBAL date_created String 2024-11-12T05:37:49Z
attribute NC_GLOBAL geospatial_bounds String POLYGON ((-3850000 5850000, 3750000 5850000, 3750000 -5350000, -3850000 -5350000, -3850000 5850000))
attribute NC_GLOBAL geospatial_bounds_crs String EPSG:3411
attribute NC_GLOBAL geospatial_x_resolution String 25000 meters
attribute NC_GLOBAL geospatial_x_units String meters
attribute NC_GLOBAL geospatial_y_resolution String 25000 meters
attribute NC_GLOBAL geospatial_y_units String meters
attribute NC_GLOBAL grid_mapping_crs_wkt String PROJCS["NSIDC Sea Ice Polar Stereographic North",GEOGCS["Unspecified datum based upon the Hughes 1980 ellipsoid",DATUM["Not_specified_based_on_Hughes_1980_ellipsoid",SPHEROID["Hughes 1980",6378273,298.279411123061,AUTHORITY["EPSG","7058"]],AUTHORITY["EPSG","6054"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4054"]],PROJECTION["Polar_Stereographic"],PARAMETER["latitude_of_origin",70],PARAMETER["central_meridian",-45],PARAMETER["scale_factor",1],PARAMETER["false_easting",0],PARAMETER["false_northing",0],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["X",EAST],AXIS["Y",NORTH],AUTHORITY["EPSG","3411"]]
attribute NC_GLOBAL grid_mapping_false_easting double 0.0
attribute NC_GLOBAL grid_mapping_false_northing double 0.0
attribute NC_GLOBAL grid_mapping_GeoTransform String -3850000 25000 0 5850000 0 -25000
attribute NC_GLOBAL grid_mapping_inverse_flattening double 298.279411123064
attribute NC_GLOBAL grid_mapping_latitude_of_projection_origin double 90.0
attribute NC_GLOBAL grid_mapping_long_name String NSIDC_NH_PolarStereo_25km
attribute NC_GLOBAL grid_mapping_longitude_of_prime_meridian double 0.0
attribute NC_GLOBAL grid_mapping_name String polar_stereographic
attribute NC_GLOBAL grid_mapping_proj4text String +proj=stere +lat_0=90 +lat_ts=70 +lon_0=-45 +k=1 +x_0=0 +y_0=0 +a=6378273 +b=6356889.449 +units=m +no_defs
attribute NC_GLOBAL grid_mapping_semi_major_axis double 6378273.0
attribute NC_GLOBAL grid_mapping_spatial_ref String PROJCS["NSIDC Sea Ice Polar Stereographic North",GEOGCS["Unspecified datum based upon the Hughes 1980 ellipsoid",DATUM["Not_specified_based_on_Hughes_1980_ellipsoid",SPHEROID["Hughes 1980",6378273,298.279411123061,AUTHORITY["EPSG","7058"]],AUTHORITY["EPSG","6054"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4054"]],PROJECTION["Polar_Stereographic"],PARAMETER["latitude_of_origin",70],PARAMETER["central_meridian",-45],PARAMETER["scale_factor",1],PARAMETER["false_easting",0],PARAMETER["false_northing",0],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["X",EAST],AXIS["Y",NORTH],AUTHORITY["EPSG","3411"]]
attribute NC_GLOBAL grid_mapping_srid String urn:ogc:def:crs:EPSG::3411
attribute NC_GLOBAL grid_mapping_standard_parallel double 70.0
attribute NC_GLOBAL grid_mapping_straight_vertical_longitude_from_pole double -45.0
attribute NC_GLOBAL grid_mapping_units String meters
attribute NC_GLOBAL history String Generated from https://nsidc.org/data/nsidc-0001
attribute NC_GLOBAL id String https://doi.org/10.7265/rjzb-pf78 (external link)
attribute NC_GLOBAL infoUrl String https://nsidc.org/data/g02202/versions/5 (external link)
attribute NC_GLOBAL institution String NSIDC > National Snow and Ice Data Center
attribute NC_GLOBAL keywords String CONTINENT > NORTH AMERICA > CANADA > HUDSON BAY, Continent > North America > Canada > Hudson Bay, Earth Science > Cryosphere > Sea Ice > Sea Ice Concentration, Geographic Region > Arctic, Geographic Region > Northern Hemisphere, Geographic Region > Polar, Ocean > Arctic Ocean, Ocean > Arctic Ocean > Barents Sea, Ocean > Arctic Ocean > Beaufort Sea, Ocean > Arctic Ocean > Chukchi Sea, Ocean > Atlantic Ocean > North Atlantic Ocean > Davis Straight, OCEAN > ATLANTIC OCEAN > NORTH ATLANTIC OCEAN > GULF OF ST LAWRENCE, Ocean > Atlantic Ocean > North Atlantic Ocean > North Sea, Ocean > Atlantic Ocean > North Atlantic Ocean > Norwegian Sea, OCEAN > ATLANTIC OCEAN > NORTH ATLANTIC OCEAN > SVALBARD AND JAN MAYEN, Ocean > Pacific Ocean, Ocean > Pacific Ocean > North Pacific Ocean > Bering Sea, Ocean > Pacific Ocean > North Pacific Ocean > Sea Of Okhotsk
attribute NC_GLOBAL keywords_vocabulary String NASA Global Change Master Directory (GCMD) Keywords, Version 17.1
attribute NC_GLOBAL license String No constraints on data access or use
attribute NC_GLOBAL metadata_link String https://nsidc.org/data/g02202/versions/5 (external link)
attribute NC_GLOBAL naming_authority String org.doi.dx
attribute NC_GLOBAL platform String DMSP 5D-3/F17 > Defense Meteorological Satellite Program-F17
attribute NC_GLOBAL processing_level String NOAA Level 3
attribute NC_GLOBAL product_version String v05r00
attribute NC_GLOBAL program String NOAA Climate Data Record Program
attribute NC_GLOBAL proj_crs_code String EPSG:3411
attribute NC_GLOBAL project String NOAA/NSIDC passive microwave sea ice concentration climate data record
attribute NC_GLOBAL references String Comiso, J. C., and F. Nishio. 2008. Trends in the Sea Ice Cover Using Enhanced and Compatible AMSR-E, SSM/I, and SMMR Data. Journal of Geophysical Research 113, C02S07, doi:10.1029/2007JC0043257. ; Comiso, J. C., D. Cavalieri, C. Parkinson, and P. Gloersen. 1997. Passive Microwave Algorithms for Sea Ice Concentrations: A Comparison of Two Techniques. Remote Sensing of the Environment 60(3):357-84. ; Comiso, J. C. 1984. Characteristics of Winter Sea Ice from Satellite Multispectral Microwave Observations. Journal of Geophysical Research 91(C1):975-94. ; Cavalieri, D. J., P. Gloersen, and W. J. Campbell. 1984. Determination of Sea Ice Parameters with the NIMBUS-7 SMMR. Journal of Geophysical Research 89(D4):5355-5369. ; Cavalieri, D. J., C. l. Parkinson, P. Gloersen, J. C. Comiso, and H. J. Zwally. 1999. Deriving Long-term Time Series of Sea Ice Cover from Satellite Passive-Microwave Multisensor Data Sets. Journal of Geophysical Research 104(7): 15,803-15,814 ; Comiso, J.C., R.A. Gersten, L.V. Stock, J. Turner, G.J. Perez, and K. Cho. 2017. Positive Trend in the Antarctic Sea Ice Cover and Associated Changes in Surface Temperature. J. Climate, 30, 2251â€"2267, doi:10.1175/JCLI-D-16-0408.1
attribute NC_GLOBAL sensor String SSMIS > Special Sensor Microwave Imager/Sounder
attribute NC_GLOBAL software_version_id String git@github.com:nsidc/seaice_ecdr.git@093d056580028f123c3a90654c04abf3edea0300
attribute NC_GLOBAL source String Generated from https://nsidc.org/data/nsidc-0001
attribute NC_GLOBAL sourceUrl String (local files)
attribute NC_GLOBAL spatial_resolution String 25km
attribute NC_GLOBAL standard_name_vocabulary String CF Standard Name Table (v83, 17 October 2023)
attribute NC_GLOBAL summary String This data set provides a passive microwave sea ice concentration climate data record (CDR) based on gridded brightness temperatures (TBs) from the Nimbus-7 Scanning Multichannel Microwave Radiometer (SMMR) and the Defense Meteorological Satellite Program (DMSP) series of passive microwave radiometers: the Special Sensor Microwave Imager (SSM/I) and the Special Sensor Microwave Imager/Sounder (SSMIS). The sea ice concentration CDR is an estimate of sea ice concentration that is produced by combining concentration estimates from two algorithms developed at the NASA Goddard Space Flight Center (GSFC): the NASA Team (NT) algorithm and the Bootstrap (BT) algorithm. The individual algorithms are used to process and combine brightness temperature data at National Snow and Ice Data Center (NSIDC). This product is designed to provide a consistent time series of sea ice concentrations (the fraction, or percentage, of ocean area covered by sea ice) from November 1978 to the present, which spans the coverage of several passive microwave instruments. The data are gridded on the NSIDC polar stereographic grid with 25 km x 25 km grid cells and are available in Network Common Data Format (NetCDF) file format. Each file contains a variable with the CDR concentration values as well as variables that hold the raw NT and BT processed concentrations for reference. Variables containing standard deviation, quality flags, and projection information are also included. Files that are from 2013 to the present also contain a prototype CDR sea ice concentration based on gridded TBs from the Advanced Microwave Scanning Radiometer 2 (AMSR2) onboard the GCOM-W1 satellite.
attribute NC_GLOBAL time_coverage_duration String P1D
attribute NC_GLOBAL time_coverage_end String 2024-06-30T00:00:00Z
attribute NC_GLOBAL time_coverage_resolution String P1D
attribute NC_GLOBAL time_coverage_start String 1978-10-25T00:00:00Z
attribute NC_GLOBAL title String Sea Ice Concentration, NOAA/NSIDC Climate Data Record V5, Northern Hemisphere, 25km, Science
Quality, 1978-Present, Daily
dimension time   double nValues=16686, evenlySpaced=true, averageSpacing=1 day
attribute time _ChunkSizes uint 512
attribute time _CoordinateAxisType String Time
attribute time actual_range double 2.781216E8, 1.7197056E9
attribute time axis String T
attribute time calendar String standard
attribute time coverage_content_type String coordinate
attribute time ioos_category String Time
attribute time long_name String ANSI date
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
attribute time valid_range long 0, 30000
dimension y   double nValues=448, evenlySpaced=true, averageSpacing=-25000.0
attribute y _ChunkSizes uint 448
attribute y _FillValue double NaN
attribute y actual_range double -5337500.0, 5837500.0
attribute y axis String Y
attribute y coverage_content_type String coordinate
attribute y ioos_category String Location
attribute y long_name String y coordinate of projection
attribute y standard_name String projection_y_coordinate
attribute y units String meters
attribute y valid_range double -5350000.0, 5850000.0
dimension x   double nValues=304, evenlySpaced=true, averageSpacing=25000.0
attribute x _ChunkSizes uint 304
attribute x _FillValue double NaN
attribute x actual_range double -3837500.0, 3737500.0
attribute x axis String X
attribute x coverage_content_type String coordinate
attribute x ioos_category String Location
attribute x long_name String x coordinate of projection
attribute x standard_name String projection_x_coordinate
attribute x units String meters
attribute x valid_range double -3850000.0, 3750000.0
variable cdr_seaice_conc_interp_spatial_flag   ubyte time, y, x
attribute cdr_seaice_conc_interp_spatial_flag _ChunkSizes uint 1, 448, 304
attribute cdr_seaice_conc_interp_spatial_flag _FillValue ubyte 255
attribute cdr_seaice_conc_interp_spatial_flag colorBarMaximum double 40.0
attribute cdr_seaice_conc_interp_spatial_flag colorBarMinimum double 0.0
attribute cdr_seaice_conc_interp_spatial_flag flag_masks ubyte 1, 2, 4, 8, 16, 32
attribute cdr_seaice_conc_interp_spatial_flag flag_meanings String 19v_tb_value_interpolated 19h_tb_value_interpolated 22v_tb_value_interpolated 37v_tb_value_interpolated 37h_tb_value_interpolated pole_hole_spatially_interpolated_(Arctic_only)
attribute cdr_seaice_conc_interp_spatial_flag ioos_category String Quality
attribute cdr_seaice_conc_interp_spatial_flag long_name String NOAA/NSIDC CDR of Passive Microwave Sea Ice Concentration spatial interpolation flags
attribute cdr_seaice_conc_interp_spatial_flag standard_name String status_flag
attribute cdr_seaice_conc_interp_spatial_flag units String 1
attribute cdr_seaice_conc_interp_spatial_flag valid_range ubyte 0, 63
variable cdr_seaice_conc_qa_flag   ubyte time, y, x
attribute cdr_seaice_conc_qa_flag _ChunkSizes uint 1, 448, 304
attribute cdr_seaice_conc_qa_flag _FillValue ubyte 255
attribute cdr_seaice_conc_qa_flag colorBarMaximum double 150.0
attribute cdr_seaice_conc_qa_flag colorBarMinimum double 0.0
attribute cdr_seaice_conc_qa_flag flag_masks ubyte 1, 2, 4, 8, 16, 32, 64, 128
attribute cdr_seaice_conc_qa_flag flag_meanings String BT_weather_filter_applied NT_weather_filter_applied Land_spillover_filter_applied No_input_data invalid_ice_mask_applied spatial_interpolation_applied temporal_interpolation_applied melt_start_detected
attribute cdr_seaice_conc_qa_flag ioos_category String Quality
attribute cdr_seaice_conc_qa_flag long_name String NOAA/NSIDC CDR of Passive Microwave Sea Ice Concentration QA flags
attribute cdr_seaice_conc_qa_flag standard_name String status_flag
attribute cdr_seaice_conc_qa_flag units String 1
attribute cdr_seaice_conc_qa_flag valid_range ubyte 0, 255
variable cdr_seaice_conc_interp_temporal_flag   ubyte time, y, x
attribute cdr_seaice_conc_interp_temporal_flag _ChunkSizes uint 1, 448, 304
attribute cdr_seaice_conc_interp_temporal_flag _FillValue ubyte 255
attribute cdr_seaice_conc_interp_temporal_flag colorBarMaximum double 60.0
attribute cdr_seaice_conc_interp_temporal_flag colorBarMinimum double 0.0
attribute cdr_seaice_conc_interp_temporal_flag comment String Value of 0 indicates no temporal interpolation occurred. Values greater than 0 and less than or equal to 55 are of the form 'AB' where 'A' indicates the number of days prior to the current day and 'B' indicates the number of days after the current day used to linearly interpolate the data. If either A or B are zero, the value was extrapolated from that date rather than interpolated. A value of 255 indicates that temporal interpolation could not be accomplished.
attribute cdr_seaice_conc_interp_temporal_flag flag_meanings String no_temporal_interp 1_day_after 2_days_after 3_days_after 1_day_prior 1_day_prior_and_1_day_after 1_day_prior_and_2_days_after 1_day_prior_and_3_days_after 1_day_prior_and_4_days_after 1_day_prior_and_5_days_after 2_days_prior 2_days_prior_and_1_day_after 2_days_prior_and_2_days_after 2_days_prior_and_3_days_after 2_days_prior_and_4_days_after 2_days_prior_and_5_days_after 3_days_prior 3_days_prior_and_1_day_after 3_days_prior_and_2_days_after 3_days_prior_and_3_days_after 3_days_prior_and_4_days_after 3_days_prior_and_5_days_after 4_days_prior_and_1_day_after 4_days_prior_and_2_days_after 4_days_prior_and_3_days_after 4_days_prior_and_4_days_after 4_days_prior_and_5_days_after 5_days_prior_and_1_day_after 5_days_prior_and_2_days_after 5_days_prior_and_3_days_after 5_days_prior_and_4_days_after 5_days_prior_and_5_days_after
attribute cdr_seaice_conc_interp_temporal_flag flag_values ubyte 0, 1, 2, 3, 10, 11, 12, 13, 14, 15, 20, 21, 22, 23, 24, 25, 30, 31, 32, 33, 34, 35, 41, 42, 43, 44, 45, 51, 52, 53, 54, 55
attribute cdr_seaice_conc_interp_temporal_flag ioos_category String Quality
attribute cdr_seaice_conc_interp_temporal_flag long_name String NOAA/NSIDC CDR of Passive Microwave Sea Ice Concentration temporal interpolation flags
attribute cdr_seaice_conc_interp_temporal_flag standard_name String status_flag
attribute cdr_seaice_conc_interp_temporal_flag units String 1
attribute cdr_seaice_conc_interp_temporal_flag valid_range ubyte 0, 55
variable cdr_seaice_conc   double time, y, x
attribute cdr_seaice_conc _ChunkSizes uint 1, 448, 304
attribute cdr_seaice_conc _FillValue double 2.5500000000000003
attribute cdr_seaice_conc ancillary_variables String cdr_seaice_conc_stdev cdr_seaice_conc_qa_flag
attribute cdr_seaice_conc colorBarMaximum double 1.0
attribute cdr_seaice_conc colorBarMinimum double 0.0
attribute cdr_seaice_conc coverage_content_type String image
attribute cdr_seaice_conc ioos_category String Ice Distribution
attribute cdr_seaice_conc long_name String NOAA/NSIDC CDR of Passive Microwave Sea Ice Concentration
attribute cdr_seaice_conc standard_name String sea_ice_area_fraction
attribute cdr_seaice_conc units String 1
attribute cdr_seaice_conc valid_range double 0.0, 1.0
variable cdr_seaice_conc_stdev   float time, y, x
attribute cdr_seaice_conc_stdev _ChunkSizes uint 1, 448, 304
attribute cdr_seaice_conc_stdev _FillValue float -1.0
attribute cdr_seaice_conc_stdev colorBarMaximum double 0.1
attribute cdr_seaice_conc_stdev colorBarMinimum double 0.0
attribute cdr_seaice_conc_stdev ioos_category String Statistics
attribute cdr_seaice_conc_stdev long_name String NOAA/NSIDC CDR of Passive Microwave Sea Ice Concentration Source Estimated Standard Deviation
attribute cdr_seaice_conc_stdev units String 1
attribute cdr_seaice_conc_stdev valid_range float 0.0, 1.0

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.


 
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