ERDDAP > info > ncei_polarAPPX20_nhem_grid

Grid DAP Data	Sub- set	Table DAP Data	Make A Graph	W M S	Source Data Files	Title	Sum- mary	FGDC, ISO, Metadata	Back- ground Info	RSS	E mail	Institution	Dataset ID
data			graph		files	Lat-Lon Grid, Extended AVHRR Polar Pathfinder APP-X NCEI Climate Data Record V2, Arctic		M	background			NOAA/NCEI	ncei_polarAPPX20_nhem_grid

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
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
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
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	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.