Data Access Form

Dataset Title:	Apr longterm mean diurnal cycle air temperature from the NCEP Reanalysis (airapr.mon.dailyanom), 2.5°, 0001
Institution:	NOAA NWS NCEP, NCAR (Dataset ID: noaa_psl_88a2_790e_5fef)
Information:	Summary \| License \| FGDC \| ISO 19115 \| Metadata \| Background \| Make a graph

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Dimensions	Size	Spacing
time (UTC)	4	6h 0m 0s (even)

level (millibar)	17	-61.875 (uneven)

latitude (degrees_north)	73	-2.5 (even)

longitude (degrees_east)	144	2.5 (even)

Grid Variables (which always also download all of the dimension variables)

air (Diurnal Cycle Anomaly of Air Temperature for April, degree_C)

File type: (more information)

(Documentation / Bypass this form)

(Please be patient. It may take a while to get the data.)

The Dataset Attribute Structure (.das) for this Dataset

Attributes {
  time {
    String _CoordinateAxisType "Time";
    Float64 actual_range -6.21279936e+10, -6.21279288e+10;
    String avg_period "0017-00-00 00:00:00";
    String axis "T";
    String delta_t "0000-00-00 06:00:00";
    String ioos_category "Time";
    String long_name "Time";
    Float64 ltm_range 1.7338824e+7, 1.7487096e+7;
    String prev_avg_period "0000-00-00 06:00:00";
    String standard_name "time";
    String time_origin "01-JAN-1970 00:00:00";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  level {
    Float32 actual_range 10.0, 1000.0;
    String axis "Z";
    Int16 GRIB_id 100;
    String GRIB_name "hPa";
    String ioos_category "Pressure";
    String long_name "Level";
    String positive "down";
    String units "millibar";
  }
  latitude {
    String _CoordinateAxisType "Lat";
    Float32 actual_range -90.0, 90.0;
    String axis "Y";
    String ioos_category "Location";
    String long_name "Latitude";
    String standard_name "latitude";
    String units "degrees_north";
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float32 actual_range 0.0, 357.5;
    String axis "X";
    String ioos_category "Location";
    String long_name "Longitude";
    String standard_name "longitude";
    String units "degrees_east";
  }
  air {
    Float32 actual_range -1.8318723, 1.7674172;
    Float64 colorBarMaximum 10.0;
    Float64 colorBarMinimum -10.0;
    String drawLandMask "under";
    String ioos_category "Temperature";
    Int16 least_significant_digit 0;
    String level_desc "Pressure Levels";
    String long_name "Diurnal Cycle Anomaly of Air Temperature for April";
    Float32 missing_value -9.96921e+36;
    String parent_stat "Other";
    Int16 precision 0;
    String standard_name "air_temperature_anomaly";
    String statistic "Anomaly";
    String units "degree_C";
    String var_desc "Air Temperature";
  }
  NC_GLOBAL {
    String _NCProperties "version=2,netcdf=4.6.3,hdf5=1.10.5";
    String cdm_data_type "Grid";
    String Conventions "COARDS, CF-1.6, ACDD-1.3";
    String creator_email "Wesley.Ebisuzaki@noaa.gov";
    String creator_name "NOAA NWS NCEP, NCAR";
    String creator_type "institution";
    String creator_url "https://www.cpc.ncep.noaa.gov/products/wesley/reanalysis.html";
    String dataset_title "NCEP-NCAR Reanalysis 1";
    String description "Data from NCEP initialized reanalysis (4x/day).  These are interpolated to pressure surfaces from model (sigma) surfaces.";
    Float64 Easternmost_Easting 357.5;
    Float64 geospatial_lat_max 90.0;
    Float64 geospatial_lat_min -90.0;
    Float64 geospatial_lat_resolution 2.5;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max 357.5;
    Float64 geospatial_lon_min 0.0;
    Float64 geospatial_lon_resolution 2.5;
    String geospatial_lon_units "degrees_east";
    String history 
"/home/hoop/crdc/cpreanjuke2farm/cpreanjuke2farm Tue Oct 17 20:07:08 1995 from air.85.nc
created 95/02/06 by Hoop (netCDF2.3)
Converted to chunked, deflated non-packed NetCDF4 2014/09
2024-04-27T06:35:06Z https://psl.noaa.gov/thredds/dodsC/Datasets/ncep.reanalysis.derived/pressure/airapr.mon.dailyanom.nc
2024-04-27T06:35:06Z http://upwell.pfeg.noaa.gov/erddap/griddap/noaa_psl_88a2_790e_5fef.das";
    String id "Datasets/ncep.reanalysis.derived/pressure/airapr.mon.dailyanom.nc";
    String infoUrl "http://www.psl.noaa.gov/data/gridded/data.ncep.reanalysis.derived.html";
    String institution "NOAA NWS NCEP, NCAR";
    String keywords "air, air_temperature_anomaly, airapr.mon.dailyanom, anomalies, anomaly, atmosphere, atmospheric, center, centers, cycle, data, diurnal, earth, Earth Science > Atmosphere > Atmospheric Temperature > Temperature Anomalies, environmental, latitude, level, long, longitude, longterm, ltm, mean, national, ncar, ncep, noaa, nws, prediction, reanalysis, research, science, service, temperature, term, time, weather";
    String keywords_vocabulary "GCMD Science Keywords";
    String license 
"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.";
    Float64 Northernmost_Northing 90.0;
    String platform "Model";
    String references "http://www.psl.noaa.gov/data/gridded/data.ncep.reanalysis.derived.html";
    String sourceUrl "https://psl.noaa.gov/thredds/dodsC/Datasets/ncep.reanalysis.derived/pressure/airapr.mon.dailyanom.nc";
    Float64 Southernmost_Northing -90.0;
    String standard_name_vocabulary "CF Standard Name Table v70";
    String summary "Apr longterm mean diurnal cycle air temperature from the National Centers for Environmental Prediction (NCEP) Reanalysis. Data from NCEP initialized reanalysis (4x/day).  These are interpolated to pressure surfaces from model (sigma) surfaces.";
    String time_coverage_end "0001-04-01T18:00:00Z";
    String time_coverage_start "0001-04-01T00:00:00Z";
    String title "Apr longterm mean diurnal cycle air temperature from the NCEP Reanalysis (airapr.mon.dailyanom), 2.5°, 0001";
    Float64 Westernmost_Easting 0.0;
  }
}

Using griddap to Request Data and Graphs from Gridded Datasets

griddap lets you request a data subset, graph, or map from a gridded dataset (for example, sea surface temperature data from a satellite), via a specially formed URL. griddap uses the OPeNDAP (external link)

Data Access Protocol (DAP) (external link)

and its projection constraints (external link)

The URL specifies what you want: the dataset, a description of the graph or the subset of the data, and the file type for the response.

(easy) You can get data by using the dataset's Data Access Form. It makes the URL for you.
(easy) You can make a graph or map by using the dataset's Make A Graph form. It makes the URL for you.
(not hard) You can bypass the forms and get the data or make a graph or map by generating the URL by hand or with a computer program or script.

griddap request URLs must be in the form
https://upwell.pfeg.noaa.gov/erddap/griddap/datasetID.fileType{?query}
For example,
https://upwell.pfeg.noaa.gov/erddap/griddap/jplMURSST41.htmlTable?analysed_sst[(2002-06-01T09:00:00Z)][(-89.99):1000:(89.99)][(-179.99):1000:(180.0)]
Thus, the query is often a data variable name (e.g., analysed_sst), followed by [(start):stride:(stop)] (or a shorter variation of that) for each of the variable's dimensions (for example, [time][latitude][longitude]).

For details, see the griddap Documentation.