HDF5 file, superblock version 0
group /
	attribute Conventions = "CF-1.6, ACDD-1.3"
	attribute acknowledgment = "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 cdm_data_type = "Grid"
	attribute cdr_variable = "cdr_seaice_conc"
	attribute comment = "none"
	attribute contributor_name = "Walter N. Meier, Florence Fetterer, Ann Windnagel, J. Scott Stewart, Trey Stafford, Matt Fisher"
	attribute contributor_role = "principal investigator, author, author, software developer, software developer, software developer"
	attribute creator_email = "nsidc@nsidc.org"
	attribute creator_url = "http://nsidc.org/"
	attribute date_created = "2021-06-21T21:26:35Z"
	attribute geospatial_lat_max = -41.45
	attribute geospatial_lat_min = -90.0
	attribute geospatial_lat_units = "degrees_north"
	attribute geospatial_lon_max = 180.0
	attribute geospatial_lon_min = -180.0
	attribute geospatial_lon_units = "degrees_east"
	attribute id = "https://doi.org/10.7265/sr8p-kc62"
	attribute institution = "NSIDC > National Snow and Ice Data Center"
	attribute keywords = "EARTH SCIENCE > CRYOSPHERE > SEA ICE > SEA ICE CONCENTRATION, Geographic Region > Polar, Geographic Region > Southern Hemisphere, Ocean > Southern Ocean, Ocean > Southern Ocean > Bellingshausen Sea, Ocean > Southern Ocean > Ross Sea, Ocean > Southern Ocean > Weddell Sea"
	attribute keywords_vocabulary = "NASA Global Change Master Directory (GCMD) Keywords, Version 7.0.0"
	attribute license = "No constraints on data access or use"
	attribute metadata_Link = "https://nsidc.org/data/g02202/versions/4/"
	attribute naming_authority = "org.doi.dx"
	attribute platform = "NIMBUS-7"
	attribute processing_level = "NOAA Level 3"
	attribute product_version = "v04r00"
	attribute program = "NOAA Climate Data Record Program"
	attribute project = "NOAA/NSIDC passive microwave sea ice concentration climate data record"
	attribute references = "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, 2251–2267, https://doi.org/10.1175/JCLI-D-16-0408.1"
	attribute sensor = "SMMR > Scanning Multichannel Microwave Radiometer"
	attribute software_version_id = "git@bitbucket.org:nsidc/seaice_cdr.git@8f4b56efc0583a583e96e12cc1229bbd3b9a5c02"
	attribute source = "Generated from NSIDC0007"
	attribute spatial_resolution = "25km"
	attribute standard_name_vocabulary = "CF Standard Name Table (v16, 11 October 2010)"
	attribute summary = "This data set provides a passive microwave sea ice concentration climate data record (CDR) based on gridded brightness temperatures (TBs) from the Defense Meteorological Satellite Program (DMSP) series of passive microwave radiometers: the Nimbus-7 Scanning Multichannel Microwave Radiometer (SMMR), 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 algorithm and the Bootstrap algorithm. The individual algorithms are used to process and combine brightness temperatures at 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 x 25 km grid cells, and are available in NetCDF file format. Each file contains a variable with the CDR concentration values as well as variables that hold the NASA Team and Bootstrap processed concentrations for reference. Variables containing standard deviation, quality flags, and projection information are also included. Data are available via FTP."
	attribute time_coverage_duration = "P1D"
	attribute time_coverage_end = "1985-06-22T23:59:59Z"
	attribute time_coverage_resolution = "P1D"
	attribute time_coverage_start = "1985-06-22T00:00:00Z"
	attribute title = "NOAA/NSIDC Climate Data Record of Passive Microwave Sea Ice Concentration Version 4"
dataset /cdr_seaice_conc: uint8, shape (1, 332, 316)
	attribute _FillValue = 255
	attribute _Unsigned = "true"
	attribute ancillary_variables = "stdev_of_cdr_seaice_conc qa_of_cdr_seaice_conc"
	attribute coordinates = "time ygrid xgrid"
	attribute datum = "+ellps=urn:ogc:def:crs:EPSG::4326"
	attribute flag_meanings = "pole_hole lakes coastal land_mask missing_data"
	attribute flag_values = 251, 252, 253, 254, 255
	attribute grid_mapping = "projection"
	attribute long_name = "NOAA/NSIDC Climate Data Record of Passive Microwave Daily Southern Hemisphere Sea Ice Concentration"
	attribute reference = "https://nsidc.org/data/g02202/versions/4/"
	attribute scale_factor = 0.00999999978
	attribute standard_name = "sea_ice_area_fraction"
	attribute units = "1"
	attribute valid_range = 0, 100
dataset /nsidc_bt_seaice_conc: uint8, shape (1, 332, 316)
	attribute _FillValue = 255
	attribute _Unsigned = "true"
	attribute coordinates = "time ygrid xgrid"
	attribute datum = "+ellps=urn:ogc:def:crs:EPSG::4326"
	attribute flag_meanings = "pole_hole unused coastal land_mask missing_data"
	attribute flag_values = 251, 252, 253, 254, 255
	attribute grid_mapping = "projection"
	attribute long_name = "Passive Microwave Daily Southern Hemisphere Sea Ice Concentration by Bootstrap algorithm processed by NSIDC"
	attribute scale_factor = 0.00999999978
	attribute standard_name = "sea_ice_area_fraction"
	attribute units = "1"
	attribute valid_range = 0, 100
dataset /nsidc_nt_seaice_conc: uint8, shape (1, 332, 316)
	attribute _FillValue = 255
	attribute _Unsigned = "true"
	attribute coordinates = "time ygrid xgrid"
	attribute datum = "+ellps=urn:ogc:def:crs:EPSG::4326"
	attribute flag_meanings = "pole_hole unused coastal land_mask missing_data"
	attribute flag_values = 251, 252, 253, 254, 255
	attribute grid_mapping = "projection"
	attribute long_name = "Passive Microwave Daily Southern Hemisphere Sea Ice Concentration by NASA Team algorithm processed by NSIDC"
	attribute scale_factor = 0.00999999978
	attribute standard_name = "sea_ice_area_fraction"
	attribute units = "1"
	attribute valid_range = 0, 100
dataset /projection: string(1), shape ()
	attribute GeoTransform = "-3950000.0 25000.0 0 4350000.0 0 -25000.0"
	attribute false_easting = 0.0
	attribute false_northing = 0.0
	attribute grid_boundary_bottom_projected_y = -3950000.0
	attribute grid_boundary_left_projected_x = -3950000.0
	attribute grid_boundary_right_projected_x = 3950000.0
	attribute grid_boundary_top_projected_y = 4350000.0
	attribute grid_mapping_name = "polar_stereographic"
	attribute latitude_of_projection_origin = -90.0
	attribute longitude_of_projection_origin = 0.0
	attribute parent_grid_cell_column_subset_end = 316.0
	attribute parent_grid_cell_column_subset_start = 0.0
	attribute parent_grid_cell_row_subset_end = 332.0
	attribute parent_grid_cell_row_subset_start = 0.0
	attribute proj4text = "+proj=stere +lat_0=-90 +lat_ts=-70 +lon_0=0 +k=1 +x_0=0 +y_0=0 +a=6378273 +b=6356889.449 +units=m +no_defs"
	attribute scaling_factor = 1.0
	attribute semimajor_radius = 6378273.0
	attribute semiminor_radius = 6356889.449
	attribute spatial_ref = "PROJCS[\"NSIDC Sea Ice Polar Stereographic South\",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\",0],PARAMETER[\"scale_factor\",1],PARAMETER[\"false_easting\",0],PARAMETER[\"false_northing\",0],AUTHORITY[\"EPSG\",\"3412\"],AXIS[\"X\",UNKNOWN],AXIS[\"Y\",UNKNOWN]]"
	attribute srid = "urn:ogc:def:crs:EPSG::3412"
	attribute standard_parallel = -70.0
	attribute straight_vertical_longitude_from_pole = 180.0
	attribute units = "meters"
dataset /qa_of_cdr_seaice_conc: uint8, shape (1, 332, 316)
	attribute _FillValue = 0
	attribute _Unsigned = "true"
	attribute coordinates = "time ygrid xgrid"
	attribute datum = "+ellps=urn:ogc:def:crs:EPSG::4326"
	attribute flag_mask_meanings = "BT_weather_filter_applied NT_weather_filter_applied BT_land_spillover_filter_applied NT_land_spillover_filter_applied valid_ice_mask_applied spatial_interpolation_applied temporal_interpolation_applied "
	attribute flag_masks = 1, 2, 4, 8, 16, 32, 64
	attribute grid_mapping = "projection"
	attribute long_name = "Passive Microwave Daily Southern Hemisphere Sea Ice Concentration QC flags"
	attribute missing_value = 0
	attribute standard_name = "sea_ice_area_fraction status_flag"
	attribute valid_range = 1, 255
dataset /spatial_interpolation_flag: uint8, shape (1, 332, 316)
	attribute _FillValue = 0
	attribute _Unsigned = "true"
	attribute coordinates = "time ygrid xgrid"
	attribute datum = "+ellps=urn:ogc:def:crs:EPSG::4326"
	attribute flag_masks = 1, 2, 4, 8, 16, 32
	attribute flag_meanings = "19v_tb_value_interpolated 19h_tb_value_interpolated 22v_tb_value_interpolated 37v_tb_value_interpolated 37h_tb_value_interpolated pole_hole_value_interpolated"
	attribute grid_mapping = "projection"
	attribute long_name = "Passive Microwave Daily Southern Hemisphere Sea Ice Concentration spatial interpolation flags"
	attribute missing_value = 0
	attribute standard_name = "interpolation_flag"
	attribute valid_range = 0, 63
dataset /stdev_of_cdr_seaice_conc: float32, shape (1, 332, 316)
	attribute _FillValue = -1.0
	attribute coordinates = "time ygrid xgrid"
	attribute datum = "+ellps=urn:ogc:def:crs:EPSG::4326"
	attribute flag_meanings = "pole_hole lakes coastal land_mask missing_data"
	attribute flag_values = 251, 252, 253, 254, 255
	attribute grid_mapping = "projection"
	attribute long_name = "Passive Microwave Daily Southern Hemisphere Sea Ice Concentration Source Estimated Standard Deviation"
	attribute missing_value = -1.0
	attribute valid_range = 0.0, 100.0
dataset /tdim: float32, shape (0)
dataset /temporal_interpolation_flag: uint8, shape (1, 332, 316)
	attribute _FillValue = 0
	attribute _Unsigned = "true"
	attribute comment = "If flagged, the value has been replaced by the value n-days prior, n-days following, or the mean of n-days prior and following where n is 1, 2, 3, 4, or 5 days."
	attribute coordinates = "time ygrid xgrid"
	attribute datum = "+ellps=urn:ogc:def:crs:EPSG::4326"
	attribute flag_masks = 1, 2, 3, 4, 5, 10, 11, 20, 22, 30, 33, 40, 44, 50, 55
	attribute flag_meanings = "1_day_following 2_days_following 3_days_following 4_days_following 5_days_following 1_day_prior mean_of_prior_and_following_1_day 2_days_prior mean_of_prior_and_following_2_days 3_days_prior mean_of_prior_and_following_3_days 4_days_prior mean_of_prior_and_following_4_days 5_days_prior mean_of_prior_and_following_5_days"
	attribute grid_mapping = "projection"
	attribute long_name = "Passive Microwave Daily Southern Hemisphere Sea Ice Concentration temporal interpolation flags"
	attribute missing_value = 0
	attribute standard_name = "interpolation_flag"
	attribute valid_range = 0, 55
dataset /time: float32, shape (1)
	attribute axis = "T"
	attribute calendar = "gregorian"
	attribute long_name = "ANSI date"
	attribute standard_name = "time"
	attribute units = "days since 1601-01-01 00:00:00"
dataset /x: float32, shape (316)
dataset /xgrid: float32, shape (316)
	attribute axis = "X"
	attribute long_name = "projection_grid_x_centers"
	attribute standard_name = "projection_x_coordinate"
	attribute units = "meters"
	attribute valid_range = -3950000.0, 3950000.0
dataset /y: float32, shape (332)
dataset /ygrid: float32, shape (332)
	attribute axis = "Y"
	attribute long_name = "projection_grid_y_centers"
	attribute standard_name = "projection_y_coordinate"
	attribute units = "meters"
	attribute valid_range = -3950000.0, 4350000.0