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 data       graph     files  Sea Ice Thickness Lat-Lon Grid, Extended AVHRR Polar Pathfinder APP-X NCEI Climate Data
Record V2, Arctic
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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=4.4.1.1|hdf5libversion=1.8.17
attribute NC_GLOBAL acknowledgement String Please acknowledge NCEI, CoastWatch West Coast Node, and this dataset (doi:10.25921/AE96-0E57).
attribute NC_GLOBAL cdm_data_type String Grid
attribute NC_GLOBAL cdr_program String NOAA Climate Data Record Program for satellites
attribute NC_GLOBAL cdr_variable String cdr_surface_temperature, cdr_surface_albedo, cdr_surface_downwelling_shortwave_flux, cdr_surface_downwelling_longwave_flux, cdr_surface_upwelling_shortwave_flux, cdr_surface_upwelling_longwave_flux, cdr_cloud_binary_mask, cdr_sea_ice_thickness, cdr_toa_net_downward_shortwave_flux, cdr_toa_outgoing_shortwave_flux, cdr_toa_outgoing_longwave_flux,surface_type, cloud_particle_phase, cloud_particle_radius, cloud_optical_depth, cloud_top_pressure, cloud_top_temperature, Cloud_type, surface_shortwave_cloud_radiative_forcing, surface_longwave_cloud_radiative_forcing
attribute NC_GLOBAL comment String In order to be compliant with the EASE Grid specifications, the following modifications were made to the source files: 1) For each data variable plus the latitude and longitude variables, the two dimensional x-y grid was rotated clockwise by 90 degrees, resulting in geographical orientation where the Greenwich Meridian runs parallel to the y (rows)-axis from the North Pole at the grid center to the middle of the x (columns)-axis at the bottom edge of the grid and -90 degree E meridian runs parallel to the x (columns)-axis from the North Pole at the grid center to the middle of the y (rows)-axis at the left edge of the grid.: 2) two coordinate variables (columns and rows) were added that correspond to the columns and rows dimensions (units of m). In addition, the time variable was modified to put all of the files in the dataset on the same base time (seconds since 1970-01-01T00:00:00Z).
attribute NC_GLOBAL Conventions String COARDS, CF-1.4, Unidata Dataset Discovery v1.0
attribute NC_GLOBAL creator_email String erd.data at noaa.gov
attribute NC_GLOBAL creator_name String NOAA/NMFS/SWFSC/ERD and NOAA/NESDIS/CoastWatch West Coast Node
attribute NC_GLOBAL creator_type String institution
attribute NC_GLOBAL date_created String 2019-06-25
attribute NC_GLOBAL defaultGraphQuery String cdr_sea_ice_thickness[(last)][(-4499620.5):(4524688.5)][(-4524688.5):(4499620.5)]&.draw=surface
attribute NC_GLOBAL doi String doi.org/10.25921/AE96-0E57
attribute NC_GLOBAL EPSG String http://epsg.io/3408 (external link)
attribute NC_GLOBAL history String Data files were obtained from NCEI at https://www.ncei.noaa.gov/data/avhrr-polar-pathfinder-extended/access/. For each data variable plus the latitude and longitude variables, the two dimensional x-y grid was rotated clockwise by 90 degrees, resulting in geographical orientation where the Greenwich Meridian runs parallel to the y (rows)-axis from the North Pole at the grid center to the middle of the x (columns)-axis at the bottom edge of the grid and -90 degree E meridian runs parallel to the x (columns)-axis from the North Pole at the grid center to the middle of the y (rows)-axis at the left edge of the grid. To coordinate variables (columns and rows) were added that correspond to the columns and rows dimensions. The coordinate variables have units of meters. The timestamp was made consistent across all files by converting to seconds since 1970-01-01T00:00:00Z. Metadata were alter to be in compliance with CF and ACDD standards.
attribute NC_GLOBAL id String Polar-APP-X_v02r00_Nhem
attribute NC_GLOBAL infoUrl String "https://www.ncei.noaa.gov/metadata/geoportal/rest/metadata/item/gov.noaa.ncdc:C00941/html"
attribute NC_GLOBAL institution String NOAA/NCEI
attribute NC_GLOBAL keywords String Earth Science > Atmosphere > Atmospheric Radiation > Longwave Radiation, Earth Science > Atmosphere > Atmospheric Radiation > Radiative Flux, Earth Science > Atmosphere > Atmospheric Radiation > Solar Radiation, Earth Science > Atmosphere > Clouds > Cloud Microphysics > Cloud Droplet Concentration(Size), Earth Science > Atmosphere > Clouds > Cloud Microphysics > Cloud Droplet Phase, Earth Science > Atmosphere > Clouds > Cloud Microphysics > Cloud Optical Depth(Thickness), Earth Science > Atmosphere > Clouds > Cloud Properties > Cloud Fraction, Earth Science > Atmosphere > Clouds > Cloud Properties > Cloud Top Pressure, Earth Science > Atmosphere > Clouds > Cloud Properties > Cloud Top Temperature, Earth Science > Atmosphere > Clouds > Cloud Properties > Cloud Type, Earth Science > Atmosphere > Clouds > Cloud Radiative Transfer > Cloud Radiative Forcing, Earth Science > Climate Indicators > Cryospheric Indicators > Ice Depth(Thickness), Earth Science > Cryosphere > Sea Ice > Ice Depth(Thickness), Earth Science > Cryosphere > Snow And Ice > Albedo, Earth Science > Cryosphere > Snow And Ice > Snow And Ice Temperature, Earth Science > Land Surface > Land Albedo, Earth Science > Land Surface > Land Temperature, Earth Science > Oceans > Sea Ice > Ice Depth(Thickness), Earth Science > Terrestrial Hydrosphere > Snow And Ice > Albedo, Earth Science > Terrestrial Hydrosphere > Snow And Ice > Ice Depth(Thickness)
attribute NC_GLOBAL keywords_vocabulary String NASA Global Change Master Directory (GCMD) Earth Science Keywords, Version 8
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.
attribute NC_GLOBAL Metadata_Conventions String COARDS, CF-1.6, Unidata Dataset Discovery v1.0
attribute NC_GLOBAL metadata_link String https://doi.org/10.25921/AE96-0E57 (external link)
attribute NC_GLOBAL naming_authority String gov.noaa.ncei
attribute NC_GLOBAL NCO String "4.6.3"
attribute NC_GLOBAL nco_openmp_thread_number int 1
attribute NC_GLOBAL platform String NOAA polar orbiting satellite 19
attribute NC_GLOBAL product_version String V2.0
attribute NC_GLOBAL PROJ4 String +proj=laea +lat_0=90 +lon_0=0 +x_0=0 +y_0=0 +a=6371228 +b=6371228 +units=m +no_defs
attribute NC_GLOBAL publisher_email String erd.data at noaa.gov
attribute NC_GLOBAL publisher_name String NOAA/NMFS/SWFSC/ERD and NOAA/NESDIS/CoastWatch West Coast Node
attribute NC_GLOBAL publisher_type String institution
attribute NC_GLOBAL references String doi.org/10.25921/AE96-0E57
attribute NC_GLOBAL sensor String Advanced Very High Resolution Radiometer (AVHRR)/3
attribute NC_GLOBAL source String individual twice daily APP-x data
attribute NC_GLOBAL sourceUrl String https://www.ncei.noaa.gov/metadata/geoportal/rest/metadata/item/gov.noaa.ncdc:C00941/html (external link)
attribute NC_GLOBAL spatial_resolution String 25 km
attribute NC_GLOBAL standard_name_vocabulary String CF Standard Name Table (v26, 08 November 2013)
attribute NC_GLOBAL summary String summary
attribute NC_GLOBAL title String Sea Ice Thickness Lat-Lon Grid, Extended AVHRR Polar Pathfinder APP-X NCEI Climate Data Record V2, Arctic
dimension columns   float nValues=361, evenlySpaced=true, averageSpacing=25067.525
attribute columns _CoordinateAxisType String GeoX
attribute columns actual_range float -4524688.0, 4499621.0
attribute columns axis String X
attribute columns comment String columns values are the upper left of the grid cells
attribute columns ioos_category String Location
attribute columns long_name String Projection Grid X Coordinates
attribute columns standard_name String projection_x_coordinate
attribute columns units String m
dimension rows   float nValues=361, evenlySpaced=true, averageSpacing=25067.525
attribute rows _CoordinateAxisType String GeoY
attribute rows actual_range float -4499620.0, 4524689.0
attribute rows axis String Y
attribute rows comment String columns values are the upper left of the grid cells
attribute rows ioos_category String Location
attribute rows long_name String Projection Grid Y Coordinates
attribute rows standard_name String projection_y_coordinate
attribute rows units String m
variable latitude   double columns, rows
attribute latitude colorBarMaximum double 90.0
attribute latitude colorBarMinimum double 0.0
attribute latitude comment String These are latitude coordinate values which correspond to rows (y axis) projected coordinate dimension values
attribute latitude ioos_category String Location
attribute latitude long_name String Latitude
attribute latitude standard_name String latitude
attribute latitude units String degrees_north
variable longitude   double columns, rows
attribute longitude colorBarMaximum double 180.0
attribute longitude colorBarMinimum double -180.0
attribute longitude comment String These are longitude coordinate values which correspond to columns (x axis) projected coordinate dimension values
attribute longitude ioos_category String Location
attribute longitude long_name String Longitude
attribute longitude standard_name String longitude
attribute longitude units String degrees_east

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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