Make A Graph

Dataset Title:	8x Daily NOAA/CIRES/DOE 20th Century Reanalysis V3 (land), 1.0°, 1981
Institution:	325 Broadway R/PSL, Boulder, CO 80305 (Dataset ID: noaa_psl_9648_4425_fefe)
Information:	Summary \| License \| FGDC \| ISO 19115 \| Metadata \| Background \| Data Access Form

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Graph Type:
X Axis:
Y Axis:
Color:

Dimensions

Start

Stop

time (UTC)

specify just 1 value →

latitude (degrees_north)

longitude (degrees_east)

Graph Settings
Color Bar:	Continuity:	Scale:
Minimum:	Maximum:	N Sections:
Draw land mask:
Y Axis Minimum:	Maximum:

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

Optional:
Then set the File Type: (File Type information)
and

or view the URL:
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Click on the map to specify a new center point.

Zoom:

[The graph you specified. Please be patient.]

Things You Can Do With Your Graphs

Well, you can do anything you want with your graphs, of course. But some things you might not have considered are:

Web page authors can embed a graph of the latest data in a web page using HTML <img> tags.
Anyone can use ERDDAPs Slide Sorter to build a personal web page that displays graphs with the latest data (or other images or HTML content), each in its own, draggable slide.

The Dataset Attribute Structure (.das) for this Dataset

Attributes {
  time {
    String _CoordinateAxisType "Time";
    Float64 actual_range 3.471552e+8, 3.471552e+8;
    String axis "T";
    String coordinate_defines "point";
    String delta_t "0000-00-00 03:00:00";
    String ioos_category "Time";
    String long_name "Time";
    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 -90.0, 90.0;
    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, 359.0;
    String axis "X";
    String coordinate_defines "point";
    String ioos_category "Location";
    String long_name "Longitude";
    String standard_name "longitude";
    String units "degrees_east";
  }
  land {
    Float32 actual_range 0.0, 1.0;
    Float64 colorBarMaximum 1.0;
    Float64 colorBarMinimum 0.0;
    String datum "wgs84";
    String GRIB_name "LAND";
    String ioos_category "Identifier";
    String level_desc "Surface";
    String long_name "time-invariant Land-sea Mask Gaussian Grid";
    Float32 missing_value -9.96921e+36;
    String parent_stat "Other";
    String standard_name "land_area_fraction";
    String statistic "Ensemble Mean";
    String units "frac.";
    Float32 valid_range 0.0, 1.0;
    String var_desc "Land-sea mask";
  }
  NC_GLOBAL {
    String _NCProperties "version=2,netcdf=4.6.3,hdf5=1.10.5";
    String assimilation_algorithm "Ensemble Kalman Filter with 4DIAU";
    String cdm_data_type "Grid";
    String citation 
"Compo,G.P. <https://www.psl.noaa.gov/people/gilbert.p.compo>, 
J.S. Whitaker <https://www.psl.noaa.gov/people/jeffrey.s.whitaker>, 
P.D. Sardeshmukh, N.Matsui, R.J. Allan, X. Yin, B.E. Gleason, R.S. Vose, 
G. Rutledge, P. Bessemoulin, S. Bronnimann, M. Brunet, R.I. Crouthamel, 
A.N. Grant, P.Y. Groisman, P.D. Jones, M. Kruk, A.C. Kruger, G.J. Marshal, 
M. Maugeri, H.Y. Mok, O. Nordli, T.F. Ross, R.M. Trio, X.L. Wang, 
S.D. Woodruff, and S.J. Worley, 2011:  The Twentieth Century Reanalysis Project
<https://onlinelibrary.wiley.com/doi/10.1002/qj.776/abstract>.
Quarterly J. Roy. Meteorol. Soc./, 137, 1-28. DOI: 10.1002/qj.776.";
    String citation1 
"Slivinski, L. C, G. P. Compo, J. S. Whitaker, 
P. D. Sardeshmukh, B. S. Giese, C. McColl, 
R. Allan, X. Yin, R. Vose, H. Titchner, 
J. Kennedy, L. J. Spencer, L. Ashcroft, 
S. Bronnimann, M. Brunet, D. Camuffo, R. Cornes, 
T. A. Cram, R. Crouthamel, F. Dominguez-Castro, 
J. E. Freeman, J. Gergis, E. Hawkins, P. D. Jones, 
S. Jourdain, A. Kaplan, H. Kubota, F. Le Blancq, 
T.-C. Lee, A. Lorrey, J. Luterbacher, M. Maugeri, 
C. J. Mock, G.W. K. Moore, R. Przybylak, 
C. Pudmenzky, C. Reason, V. C. Slonosky, 
C. Smith, B. Tinz, B. Trewin, 
M. A. Valente, X. L. Wang, C. Wilkinson, K. Wood, 
and P. Wyszynski: Towards a more 
reliable historical reanalysis: Improvements for 
version 3 of the Twentieth Century Reanalysis System. 
Quarterly Journal of the Royal Meteorological Society.
 2019; 145: 2876- 2908. doi:10.1002/qj.3598.";
    String comment 
"Data are from 
NOAA/CIRES/DOE 20th Century Reanalysis version 3
(8x/day).  It consists of most variables interpolated to
pressure surfaces from model hybrid (sigma/pressure) surfaces.";
    String contact "psl.data@noaa.gov";
    String Conventions "CF-1.6, COARDS, ACDD-1.3";
    String creation_date "2019-03-19T22:57:29Z";
    String creator_email "psl.data@noaa.gov";
    String creator_name "NOAA/PSL";
    String creator_type "institution";
    String creator_url "https://www.noaa.gov/";
    String dataset_title "NOAA/CIRES/DOE 20th Century Reanalysis (V3)";
    Float64 Easternmost_Easting 359.0;
    String forcing 
"CO2, Sl, Vl, SST, Oz (CO2 as in Saha et al (2010), Oz is prescribed from CMIP5, SST is HadISST2.2,
Sl is Total Solar Irradiance (TSI) Reconstruction based on NRLTSI2, Vl defined as in Crowley & Unterman 2013)";
    String forcing_note 
"Additional information on the external forcings uses in this 
reanalysis can be found in Slivinski et al. (2019) (citation1)";
    Float64 geospatial_lat_max 90.0;
    Float64 geospatial_lat_min -90.0;
    Float64 geospatial_lat_resolution 1.0;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max 359.0;
    Float64 geospatial_lon_min 0.0;
    Float64 geospatial_lon_resolution 1.0;
    String geospatial_lon_units "degrees_east";
    String history 
"created 2019/03 by Hoop (chunked, deflated non-packed netCDF4-Classic)
esrl.psd.data@noaa.gov
2024-04-27T10:44:26Z https://psl.noaa.gov/thredds/dodsC/Datasets/20thC_ReanV3/timeInvariantMO/land.nc
2024-04-27T10:44:26Z http://upwell.pfeg.noaa.gov/griddap/noaa_psl_9648_4425_fefe.das";
    String id "Datasets/20thC_ReanV3/timeInvariantMO/land.nc";
    String infoUrl "https://www.psl.noaa.gov/data/gridded/data.20thC_ReanV3.html";
    String institution "325 Broadway R/PSL, Boulder, CO 80305";
    String keywords "20th, area, boulder, broadway, century, cires, cooperative, cover, daily, data, day, department, doe, earth, Earth Science > Land Surface > Land Use/Land Cover > Land Cover, energy, environmental, fraction, gaussian, grid, identifier, institute, invariant, land, land-sea, land_area_fraction, latitude, longitude, mask, noaa, psl, reanalysis, research, science, sciences, sea, surface, time, time-invariant, use";
    String keywords_vocabulary "GCMD Science Keywords";
    String license "These data are available free of charge under the PSD data policy";
    String name_of_model_used "ensda_v452";
    Float64 Northernmost_Northing 90.0;
    String observations "International Surface Pressure Databank version 4.7";
    String platform "Model";
    String product "reanalysis";
    String references "https://www.psl.noaa.gov/data/gridded/data.20thC_ReanV3.html";
    String source 
"20CRv3si 2018, Ensemble Kalman Filter, ocean (specified): HadISST2.2; 
atmosphere: NCEP GFS v14.0.1; 
sea ice (specified): HadISST2.3 
land: Noah 4 layer version 2";
    String sourceUrl "https://psl.noaa.gov/thredds/dodsC/Datasets/20thC_ReanV3/timeInvariantMO/land.nc";
    Float64 Southernmost_Northing -90.0;
    String spatial_resolution "1.0 degree";
    String standard_name_vocabulary "CF Standard Name Table v70";
    String summary 
"8x Daily NOAA/CIRES/Department of Energy (DOE) 20th Century Reanalysis V3. Data are from 
NOAA/CIRES/DOE 20th Century Reanalysis version 3
(8x/day).  It consists of most variables interpolated to
pressure surfaces from model hybrid (sigma/pressure) surfaces.";
    String time_coverage_end "1981-01-01T00:00:00Z";
    String time_coverage_start "1981-01-01T00:00:00Z";
    String title "8x Daily NOAA/CIRES/DOE 20th Century Reanalysis V3 (land), 1.0°, 1981";
    String version "3mo";
    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.