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Dataset Title:  Top Dataset, gaussian grid, ulwrf.ntat.mon.1981-2010.ltm (Monthly NCEP/DOE
Reanalysis 2), 0001
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Institution:  National Centers for Environmental Prediction   (Dataset ID: noaa_esrl_4f28_c8b9_629d)
Information:  Summary ? | License ? | FGDC | ISO 19115 | Metadata | Background (external link) | Make a graph
 
Dimensions ? Start ? Stride ? Stop ?  Size ?    Spacing ?
 time (UTC) ?      12    30 days 8h 43m 38s (uneven)
  < slider >
 latitude (degrees_north) ?      94    -1.904129 (uneven)
  < slider >
 longitude (degrees_east) ?      192    1.875 (even)
  < slider >
 
Grid Variables (which always also download all of the dimension variables)
 ulwrf (W/m^2) ?
 valid_yr_count (count of non-missing values used in mean) ?

File type: (more info)

(Documentation / Bypass this form) ?
 
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The Dataset Attribute Structure (.das) for this Dataset

Attributes {
  time {
    String _CoordinateAxisType "Time";
    Float64 actual_range -6.21357696e+10, -6.2106912e+10;
    String avg_period "0030-00-00 00:00:00";
    String axis "T";
    String climatology "climatology_bounds";
    String climo_period "1981/01/01 - 2010/12/31";
    String coordinate_defines "start";
    String delta_t "0000-01-00 00:00:00";
    String interpreted_actual_range "0001/01/01 00:00:00 - 0001/12/01 00:00:00";
    String ioos_category "Time";
    String long_name "Time";
    Float64 ltm_range 1586616.0, 1848840.0;
    String prev_avg_period "0000-01-00 00:00:00";
    String standard_name "time";
    String time_origin "01-JAN-1970 00:00:00";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  latitude {
    String _CoordinateAxisType "Lat";
    Float32 actual_range -88.542, 88.542;
    String axis "Y";
    String coordinate_defines "point";
    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, 358.125;
    String axis "X";
    String coordinate_defines "point";
    String ioos_category "Location";
    String long_name "Longitude";
    String standard_name "longitude";
    String units "degrees_east";
  }
  ulwrf {
    Float32 actual_range 103.6766, 345.5699;
    String cell_methods "time: mean (of each 6-hourly interval) mean (monthly of 6-hourly means)";
    Float64 colorBarMaximum 500.0;
    Float64 colorBarMinimum -500.0;
    String drawLandMask "under";
    Int16 GRIB_id 212;
    String GRIB_name "ULWRF";
    String ioos_category "Heat Flux";
    Int16 least_significant_digit 0;
    String level_desc "Nominal top of atmosphere";
    String long_name "Long Term Mean Monthly Mean of Upward Longwave Radiation Flux at the Nominal Top of Atmosphere";
    Float32 missing_value -9.96921e+36;
    String parent_stat "Mean";
    Int16 precision 1;
    String standard_name "toa_upward_longwave_radiation_flux";
    String statistic "Long Term Mean";
    String units "W/m^2";
    Float32 valid_range -150.0, 1050.0;
    String var_desc "Upward Longwave Radiation Flux";
  }
  valid_yr_count {
    Float64 colorBarMaximum 100.0;
    Float64 colorBarMinimum 0.0;
    String drawLandMask "under";
    String ioos_category "Statistics";
    String long_name "count of non-missing values used in mean";
    Int16 missing_value 32767;
  }
  NC_GLOBAL {
    String cdm_data_type "Grid";
    String comment 
"Data is from 
NCEP/DOE AMIP-II Reanalysis (Reanalysis-2)
(4x/day).  Data interpolated from model (sigma) surfaces to gaussian grid.";
    String Conventions "CF-1.6, COARDS, ACDD-1.3";
    String creator_email "Wesley.Ebisuzaki@noaa.gov";
    String creator_name "NOAA NWS NCEP, NCAR";
    String creator_type "institution";
    String creator_url "http://www.cpc.ncep.noaa.gov/products/wesley/reanalysis.html";
    String dataset_title "NCEP-DOE AMIP-II Reanalysis";
    Float64 Easternmost_Easting 358.125;
    Float64 geospatial_lat_max 88.542;
    Float64 geospatial_lat_min -88.542;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max 358.125;
    Float64 geospatial_lon_min 0.0;
    Float64 geospatial_lon_resolution 1.875;
    String geospatial_lon_units "degrees_east";
    String history 
"Created 2017/11/02 by doMonthLTM
2018-07-21T04:20:09Z https://www.esrl.noaa.gov/psd/thredds/dodsC/Datasets/ncep.reanalysis2.derived/LTMs/gaussian_grid/ulwrf.ntat.mon.1981-2010.ltm.nc
2018-07-21T04:20:09Z http://upwell.pfeg.noaa.gov/erddap/griddap/noaa_esrl_4f28_c8b9_629d.das";
    String id "Datasets/ncep.reanalysis2.derived/LTMs/gaussian_grid/ulwrf.ntat.mon.1981-2010.ltm.nchttps://www.esrl.noaa.gov/psd/thredds/dodsC/Datasets/ncep.reanalysis2.derived/LTMs/gaussian_grid/ulwrf.ntat.mon.1981-2010.ltm.nc";
    String infoUrl "https://www.esrl.noaa.gov/psd/data/gridded/data.ncep.reanalysis2.html";
    String institution "National Centers for Environmental Prediction";
    String keywords "2010.ltm, amip, atmosphere, centers, count, data, dataset, department, doe, energy, environmental, flux, gaussian, grid, heat, heat flux, intercomparison, latitude, long, longitude, longwave, mean, missing, model, month, monthly, national, ncep, nominal, non, non-missing, prediction, project, radiation, reanalysis, statistics, term, time, toa, toa_upward_longwave_radiation_flux, top, ulwrf, ulwrf.ntat.mon.1981, ulwrf.ntat.mon.1981-2010.ltm, upward, used, valid_yr_count, values";
    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 88.542;
    String not_missing_threshold_percent "minimum 3% values input to have non-missing output value";
    String platform "Model";
    String references "https://www.esrl.noaa.gov/psd/data/gridded/data.ncep.reanalysis2.html";
    String source "NCEP/DOE AMIP-II Reanalysis (Reanalysis-2) Model";
    String source_url "http://www.cpc.ncep.noaa.gov/products/wesley/reanalysis2/";
    String sourceUrl "https://www.esrl.noaa.gov/psd/thredds/dodsC/Datasets/ncep.reanalysis2.derived/LTMs/gaussian_grid/ulwrf.ntat.mon.1981-2010.ltm.nc";
    Float64 Southernmost_Northing -88.542;
    String standard_name_vocabulary "CF Standard Name Table v55";
    String summary 
"Monthly National Centers for Environmental Prediction (NCEP)/Department of Energy (DOE) Reanalysis 2. Data is from 
NCEP/DOE Atmosphere Model Intercomparison Project (AMIP)-II Reanalysis (Reanalysis-2)
(4x/day).  Data interpolated from model (sigma) surfaces to gaussian grid.";
    String time_coverage_end "0001-12-01T00:00:00Z";
    String time_coverage_start "0001-01-01T00:00:00Z";
    String title "Top Dataset, gaussian grid, ulwrf.ntat.mon.1981-2010.ltm (Monthly NCEP/DOE Reanalysis 2), 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.

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.


 
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