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Title Sum-
Institution Dataset ID
 data       graph     files  Z-DEPRECATED - Sea Ice Concentration, NOAA/NSIDC Climate Data Record V3, Arctic, 25km,
Science Quality, 1978-2019, Monthly
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The Dataset's Variables and Attributes

Row Type Variable Name Attribute Name Data Type Value
attribute NC_GLOBAL _NCProperties String version=1|netcdflibversion=|hdf5libversion=1.8.17
attribute NC_GLOBAL acknowledgment String This project was supported in part by a grant from the NOAA Climate Data Record Program. Production of original NASA Team and Bootstrap algorithm estimates supported by the NASA Polar Distributed Active Archive Center. The 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_variable String seaice_conc_monthly_cdr
attribute NC_GLOBAL comment String none
attribute NC_GLOBAL contributor_name String Walt Meier, Ruth Duerr, Florence Fetterer, Julienne Stroeve, Matt Savoie, Sean Mallory
attribute NC_GLOBAL contributor_role String PrincipalInvestigator,author,author,author,author,author
attribute NC_GLOBAL Conventions String CF-1.6, COARDS, ACDD-1.3
attribute NC_GLOBAL creator_email String nsidc at
attribute NC_GLOBAL creator_name String NSIDC
attribute NC_GLOBAL creator_url String (external link)
attribute NC_GLOBAL date_created String 2020-08-04T19:45:19Z
attribute NC_GLOBAL defaultGraphQuery String seaice_conc_monthly_cdr[(last):(last)][(-5337500.0)][(3737500.0)]&.draw=surface
attribute NC_GLOBAL history String 2017-07-03T15:07:45Z: Data file created using software: /n 2020-10-06T16:22:17: Additional metadata was added. Timestamp was converted to seconds since 1970-01-01T00:00:00Z.
attribute NC_GLOBAL id String G02202
attribute NC_GLOBAL infoUrl String (external link)
attribute NC_GLOBAL institution String NSIDC > National Snow and Ice Data Center, NOAA
attribute NC_GLOBAL keywords String algorithm, america, arctic, area, atlantic, barents, bay, beaufort, bering, bootstrap, canada, center, chukchi, climate, concentration, continent, CONTINENT > NORTH AMERICA > CANADA > HUDSON BAY, Continent > North America > Canada > Hudson Bay, cryosphere, Earth Science > Cryosphere > Sea Ice > Ice Extent, Earth Science > Cryosphere > Sea Ice > Sea Ice Concentration, Earth Science > Oceans > Sea Ice > Ice Extent, extent, Geographic Region > Arctic, Geographic Region > Northern Hemisphere, Geographic Region > Polar, goddard, goddard_bt_seaice_conc_monthly, goddard_merged_seaice_conc_monthly, goddard_nt_seaice_conc_monthly, gulf, hemisphere, hudson, ice, ice distribution, lawrence, mayen, melt, melt_onset_day_seaice_conc_monthly_cdr, microwave, month, monthly, nasa, national, noaa, noaa/nsidc, north, northern, norwegian, nsidc, ocean, 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, oceans, okhotsk, onset, over, pacific, polar, qa_of_seaice_conc_monthly_cdr, quality, record, region, science, science quality, sea, sea_ice_area_fraction, sea_ice_area_fraction status_flag, seaice_conc_monthly_cdr, snow, stdev_of_seaice_conc_monthly_cdr, straight, svalbard
attribute NC_GLOBAL keywords_vocabulary String GCMD Science Keywords
attribute NC_GLOBAL license String The data may be used and redistributed for free but is not intended for legal use, since it may contain inaccuracies. Neither the data contributor, ERD, NOAA, nor the United States Government, nor any of their employees or contractors, makes any warranty, express or implied, including warranties of merchantability and fitness for a particular purpose, or assumes any legal liability for the accuracy, completeness, or usefulness, of this information. Please acknowledge the use of these data with the following statement: "These data were provided by NOAA's Center for Satellite Applications & Research (STAR) and the CoastWatch program and distributed by NOAA/NMFS/SWFSC/ERD. " To reference these data as a citation in a paper, please follow the instructions in the license and at this link:
attribute NC_GLOBAL Metadata_Link String (external link)
attribute NC_GLOBAL naming_authority String
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 v03r01
attribute NC_GLOBAL program String NOAA Climate Data Record Program
attribute NC_GLOBAL proj_crs_code String EPSG:3411
attribute NC_GLOBAL proj_crs_code_description String The proj_crs_code attribute references a registered projection identifier (i.e. EPSG) when available. If the projection is not registered, non-standard then this attribute references a PolarWatch assigned internal identifier.
attribute NC_GLOBAL proj_false_easting double 0.0
attribute NC_GLOBAL proj_false_northing double 0.0
attribute NC_GLOBAL proj_GeoTransform String -3850000.0 25000.0 0 5850000.0 0 25000.0
attribute NC_GLOBAL proj_grid_boundary_bottom_projected_y double -5350000.0
attribute NC_GLOBAL proj_grid_boundary_left_projected_x double -3850000.0
attribute NC_GLOBAL proj_grid_boundary_right_projected_x double 3750000.0
attribute NC_GLOBAL proj_grid_boundary_top_projected_y double 5850000.0
attribute NC_GLOBAL proj_grid_mapping_name String polar_stereographic
attribute NC_GLOBAL proj_latitude_of_projection_origin double 90.0
attribute NC_GLOBAL proj_longitude_of_projection_origin double -45.0
attribute NC_GLOBAL proj_parent_grid_cell_column_subset_end double 304.0
attribute NC_GLOBAL proj_parent_grid_cell_column_subset_start double 0.0
attribute NC_GLOBAL proj_parent_grid_cell_row_subset_end double 448.0
attribute NC_GLOBAL proj_parent_grid_cell_row_subset_start double 0.0
attribute NC_GLOBAL proj_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 proj_scaling_factor double 1.0
attribute NC_GLOBAL proj_semimajor_radius double 6378273.0
attribute NC_GLOBAL proj_semiminor_radius double 6356889.449
attribute NC_GLOBAL proj_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",0.01745329251994328,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4054"]],UNIT["metre",1,AUTHORITY["EPSG","9001"]],PROJECTION["Polar_Stereographic"],PARAMETER["latitude_of_origin",70],PARAMETER["central_meridian",-45],PARAMETER["scale_factor",1],PARAMETER["false_easting",0],PARAMETER["false_northing",0],AUTHORITY["EPSG","3411"],AXIS["X",UNKNOWN],AXIS["Y",UNKNOWN]]
attribute NC_GLOBAL proj_srid String urn:ogc:def:crs:EPSG::3411
attribute NC_GLOBAL proj_standard_parallel double 70.0
attribute NC_GLOBAL proj_straight_vertical_longitude_from_pole double 135.0
attribute NC_GLOBAL proj_units String meters
attribute NC_GLOBAL project String NOAA/NSIDC passive microwave sea ice concentration climate data record
attribute NC_GLOBAL projection String EPSG:3411,
attribute NC_GLOBAL publisher_email String at
attribute NC_GLOBAL publisher_name String NOAA NMFS SWFSC ERD
attribute NC_GLOBAL publisher_type String institution
attribute NC_GLOBAL publisher_url String (external link)
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.
attribute NC_GLOBAL sensor String SSMI/S > Special Sensor Microwave Imager/Sounder
attribute NC_GLOBAL software_version_id String
attribute NC_GLOBAL source String Satellite observations
attribute NC_GLOBAL sourceUrl String (external link)
attribute NC_GLOBAL spatial_resolution String 25km
attribute NC_GLOBAL standard_name_vocabulary String CF Standard Name Table v29
attribute NC_GLOBAL summary String Alert: There is a newer version of this dataset. Please use Version 4 of the NSIDC Sea Ice Concentration CDR with ERDDAP ID: nsidcG02202v4nhmday. Link: Version 3 Summary: This data set provides a Climate Data Record (CDR) of sea ice concentration from passive microwave data. It provides a consistent, daily and monthly time series of sea ice concentrations from 09 July 1987 through the most recent processing for both the north and south polar regions. In addition, three other sea ice concentration products are included with the CDR that extend the sea ice measurements back to 26 October 1978. However, these three products are not included in the official CDR because processing the older data in a way that follows the standards of a CDR is not currently possible. All data are on a 25 km x 25 km grid. Variables containing standard deviation, quality flags, and projection information are also included.
attribute NC_GLOBAL time_coverage_duration String P1M
attribute NC_GLOBAL time_coverage_end String 2019-12-16T00:00:00Z
attribute NC_GLOBAL time_coverage_resolution String P1M
attribute NC_GLOBAL time_coverage_start String 1978-11-16T00:00:00Z
attribute NC_GLOBAL title String Z-DEPRECATED - Sea Ice Concentration, NOAA/NSIDC Climate Data Record V3, Arctic, 25km, Science Quality, 1978-2019, Monthly
dimension time   double nValues=494, evenlySpaced=false, averageSpacing=30 days 10h 28m 0s
attribute time _CoordinateAxisType String Time
attribute time actual_range double 2.800224E8, 1.5764544E9
attribute time axis String T
attribute time calendar String gregorian
attribute time coverage_content_type String coordinate
attribute time ioos_category String Time
attribute time long_name String Centered 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 ygrid   float nValues=448, evenlySpaced=true, averageSpacing=-25000.0
attribute ygrid _CoordinateAxisType String GeoY
attribute ygrid actual_range float -5337500.0, 5837500.0
attribute ygrid axis String Y
attribute ygrid comment String xgrid values are the centers of the grid cells
attribute ygrid coverage_content_type String coordinate
attribute ygrid ioos_category String Location
attribute ygrid long_name String Projection Grid Y Centers
attribute ygrid standard_name String projection_y_coordinate
attribute ygrid units String meters
attribute ygrid valid_range float -5350000.0, 5850000.0
dimension xgrid   float nValues=304, evenlySpaced=true, averageSpacing=25000.0
attribute xgrid _CoordinateAxisType String GeoX
attribute xgrid actual_range float -3837500.0, 3737500.0
attribute xgrid axis String X
attribute xgrid comment String xgrid values are the centers of the grid cells
attribute xgrid coverage_content_type String coordinate
attribute xgrid ioos_category String Location
attribute xgrid long_name String Projection Grid X Centers
attribute xgrid standard_name String projection_x_coordinate
attribute xgrid units String meters
attribute xgrid valid_range float -3850000.0, 3750000.0
variable seaice_conc_monthly_cdr   float time, ygrid, xgrid
attribute seaice_conc_monthly_cdr _FillValue float -0.02
attribute seaice_conc_monthly_cdr ancillary_variables String stdev_of_seaice_conc_monthly_cdr qa_of_seaice_conc_monthly_cdr
attribute seaice_conc_monthly_cdr cell_methods String time: mean (interval: 1 month)
attribute seaice_conc_monthly_cdr colorBarMaximum double 1.0
attribute seaice_conc_monthly_cdr colorBarMinimum double 0.0
attribute seaice_conc_monthly_cdr colorBarPalette String KT_ice
attribute seaice_conc_monthly_cdr coverage_content_type String physicalMeasurement
attribute seaice_conc_monthly_cdr datum String +ellps=urn:ogc:def:crs:EPSG::4326
attribute seaice_conc_monthly_cdr flag_meanings String pole_hole lakes coastal land_mask missing_data
attribute seaice_conc_monthly_cdr flag_values byte -5, -4, -3, -2, -1
attribute seaice_conc_monthly_cdr grid_mapping String projection
attribute seaice_conc_monthly_cdr ioos_category String Ice Distribution
attribute seaice_conc_monthly_cdr long_name String NOAA/NSIDC Climate Data Record of Passive Microwave Monthly Northern Hemisphere Sea Ice Concentration
attribute seaice_conc_monthly_cdr reference String (external link)
attribute seaice_conc_monthly_cdr standard_name String sea_ice_area_fraction
attribute seaice_conc_monthly_cdr units String 1
attribute seaice_conc_monthly_cdr valid_range float 0.0, 1.0
variable stdev_of_seaice_conc_monthly_cdr   float time, ygrid, xgrid
attribute stdev_of_seaice_conc_monthly_cdr _FillValue float -1.0
attribute stdev_of_seaice_conc_monthly_cdr colorBarMaximum double 50.0
attribute stdev_of_seaice_conc_monthly_cdr colorBarMinimum double 0.0
attribute stdev_of_seaice_conc_monthly_cdr coverage_content_type String qualityInformation
attribute stdev_of_seaice_conc_monthly_cdr datum String +ellps=urn:ogc:def:crs:EPSG::4326
attribute stdev_of_seaice_conc_monthly_cdr grid_mapping String projection
attribute stdev_of_seaice_conc_monthly_cdr ioos_category String Quality
attribute stdev_of_seaice_conc_monthly_cdr long_name String Passive Microwave Monthly Northern Hemisphere Sea Ice Concentration Source Estimated Standard Deviation
attribute stdev_of_seaice_conc_monthly_cdr missing_value float -1.0
attribute stdev_of_seaice_conc_monthly_cdr valid_range float 0.0, 1.0
variable melt_onset_day_seaice_conc_monthly_cdr   short time, ygrid, xgrid
attribute melt_onset_day_seaice_conc_monthly_cdr _FillValue short 32767
attribute melt_onset_day_seaice_conc_monthly_cdr cell_methods String time: mean (interval: 1 month)
attribute melt_onset_day_seaice_conc_monthly_cdr colorBarMaximum double 250.0
attribute melt_onset_day_seaice_conc_monthly_cdr colorBarMinimum double 50.0
attribute melt_onset_day_seaice_conc_monthly_cdr coverage_content_type String physicalMeasurement
attribute melt_onset_day_seaice_conc_monthly_cdr datum String +ellps=urn:ogc:def:crs:EPSG::4326
attribute melt_onset_day_seaice_conc_monthly_cdr grid_mapping String projection
attribute melt_onset_day_seaice_conc_monthly_cdr ioos_category String Ice Distribution
attribute melt_onset_day_seaice_conc_monthly_cdr long_name String Monthly Day of Snow Melt Onset Over Sea Ice
attribute melt_onset_day_seaice_conc_monthly_cdr missing_value short 32767
attribute melt_onset_day_seaice_conc_monthly_cdr units String 1
attribute melt_onset_day_seaice_conc_monthly_cdr valid_range short 60, 244
variable qa_of_seaice_conc_monthly_cdr   byte time, ygrid, xgrid
attribute qa_of_seaice_conc_monthly_cdr _FillValue byte 0
attribute qa_of_seaice_conc_monthly_cdr colorBarContinuous String false
attribute qa_of_seaice_conc_monthly_cdr colorBarMaximum double 64.0
attribute qa_of_seaice_conc_monthly_cdr colorBarMinimum double -8.0
attribute qa_of_seaice_conc_monthly_cdr colorBarNSections String 16
attribute qa_of_seaice_conc_monthly_cdr coverage_content_type String qualityInformation
attribute qa_of_seaice_conc_monthly_cdr datum String +ellps=urn:ogc:def:crs:EPSG::4326
attribute qa_of_seaice_conc_monthly_cdr flag_masks byte 1, 2, 4, 8, 32, 64, -128
attribute qa_of_seaice_conc_monthly_cdr flag_meanings String BT_majority_algorithm_for_monthly_CDR NT_majority_algorithm_for_monthly_CDR no_ice_allowed_per_climatology grid_cell_near_to_coast ice_present_less_half_of_month melt_detected_at_least_one_day melt_detected_greater_than_half_month
attribute qa_of_seaice_conc_monthly_cdr grid_mapping String projection
attribute qa_of_seaice_conc_monthly_cdr ioos_category String Quality
attribute qa_of_seaice_conc_monthly_cdr long_name String Passive Microwave Monthly Northern Hemisphere Sea Ice Concentration QC flags
attribute qa_of_seaice_conc_monthly_cdr missing_value byte 0
attribute qa_of_seaice_conc_monthly_cdr standard_name String sea_ice_area_fraction status_flag
attribute qa_of_seaice_conc_monthly_cdr valid_range byte 1, 127
variable goddard_merged_seaice_conc_monthly   float time, ygrid, xgrid
attribute goddard_merged_seaice_conc_monthly _FillValue float -0.02
attribute goddard_merged_seaice_conc_monthly cell_methods String time: mean (interval: 1 month)
attribute goddard_merged_seaice_conc_monthly colorBarMaximum double 1.0
attribute goddard_merged_seaice_conc_monthly colorBarMinimum double 0.0
attribute goddard_merged_seaice_conc_monthly colorBarPalette String KT_ice
attribute goddard_merged_seaice_conc_monthly coverage_content_type String physicalMeasurement
attribute goddard_merged_seaice_conc_monthly datum String +ellps=urn:ogc:def:crs:EPSG::4326
attribute goddard_merged_seaice_conc_monthly flag_meanings String pole_hole lakes coastal land_mask missing_data
attribute goddard_merged_seaice_conc_monthly flag_values byte -5, -4, -3, -2, -1
attribute goddard_merged_seaice_conc_monthly grid_mapping String projection
attribute goddard_merged_seaice_conc_monthly ioos_category String Ice Distribution
attribute goddard_merged_seaice_conc_monthly long_name String Goddard Edited Climate Data Record of Passive Microwave Monthly Northern Hemisphere Sea Ice Concentration, Goddard Edited
attribute goddard_merged_seaice_conc_monthly reference String (external link)
attribute goddard_merged_seaice_conc_monthly standard_name String sea_ice_area_fraction
attribute goddard_merged_seaice_conc_monthly units String 1
attribute goddard_merged_seaice_conc_monthly valid_range float 0.0, 1.0
variable goddard_nt_seaice_conc_monthly   float time, ygrid, xgrid
attribute goddard_nt_seaice_conc_monthly _FillValue float -0.02
attribute goddard_nt_seaice_conc_monthly cell_methods String time: mean (interval: 1 month)
attribute goddard_nt_seaice_conc_monthly colorBarMaximum double 1.0
attribute goddard_nt_seaice_conc_monthly colorBarMinimum double 0.0
attribute goddard_nt_seaice_conc_monthly colorBarPalette String KT_ice
attribute goddard_nt_seaice_conc_monthly coverage_content_type String physicalMeasurement
attribute goddard_nt_seaice_conc_monthly datum String +ellps=urn:ogc:def:crs:EPSG::4326
attribute goddard_nt_seaice_conc_monthly flag_meanings String pole_hole unused coastal land_mask missing_data
attribute goddard_nt_seaice_conc_monthly flag_values byte -5, -4, -3, -2, -1
attribute goddard_nt_seaice_conc_monthly grid_mapping String projection
attribute goddard_nt_seaice_conc_monthly ioos_category String Ice Distribution
attribute goddard_nt_seaice_conc_monthly long_name String Passive Microwave Monthly Northern Hemisphere Sea Ice Concentration by NASA Team algorithm with Goddard QC
attribute goddard_nt_seaice_conc_monthly reference String Documentation available at:
attribute goddard_nt_seaice_conc_monthly standard_name String sea_ice_area_fraction
attribute goddard_nt_seaice_conc_monthly units String 1
attribute goddard_nt_seaice_conc_monthly valid_range float 0.0, 1.0
variable goddard_bt_seaice_conc_monthly   float time, ygrid, xgrid
attribute goddard_bt_seaice_conc_monthly _FillValue float -0.02
attribute goddard_bt_seaice_conc_monthly cell_methods String time: mean (interval: 1 month)
attribute goddard_bt_seaice_conc_monthly colorBarMaximum double 1.0
attribute goddard_bt_seaice_conc_monthly colorBarMinimum double 0.0
attribute goddard_bt_seaice_conc_monthly colorBarPalette String KT_ice
attribute goddard_bt_seaice_conc_monthly coverage_content_type String physicalMeasurement
attribute goddard_bt_seaice_conc_monthly datum String +ellps=urn:ogc:def:crs:EPSG::4326
attribute goddard_bt_seaice_conc_monthly flag_meanings String pole_hole unused coastal land_mask missing_data
attribute goddard_bt_seaice_conc_monthly flag_values byte -5, -4, -3, -2, -1
attribute goddard_bt_seaice_conc_monthly grid_mapping String projection
attribute goddard_bt_seaice_conc_monthly ioos_category String Ice Distribution
attribute goddard_bt_seaice_conc_monthly long_name String Passive Microwave Monthly Northern Hemisphere Sea Ice Concentration by Bootstrap algorithm with Goddard QC
attribute goddard_bt_seaice_conc_monthly reference String Documentation available at:
attribute goddard_bt_seaice_conc_monthly standard_name String sea_ice_area_fraction
attribute goddard_bt_seaice_conc_monthly units String 1
attribute goddard_bt_seaice_conc_monthly 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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