Data Access Form

Dataset Title:	GISTEMP: 250km smoothing combined land/ocean (air.2x2.250.mon.anom.comb), 2. 0°, 1880-present
Institution:	NOAA PSL (Dataset ID: noaa_psl_8e1a_e56c_5366)
Information:	Summary \| License \| FGDC \| ISO 19115 \| Metadata \| Background \| Make a graph

To work correctly, this web page requires that JavaScript be enabled in your browser. Please:
1) Enable JavaScript in your browser:
      • Chrome: "Settings : Advanced : Privacy and security : Site Settings : JavaScript"
      • Firefox: (it should be always on!)"
      • Opera: "Settings : Websites : JavaScript"
      • Safari: "Safari : Preferences : Security : Enable JavaScript"
2) Reload this web page.

Dimensions	Size	Spacing
time (UTC)	1742	30 days 10h 30m 16s (uneven)

latitude (degrees_north)	90	-2.0 (even)

longitude (degrees_east)	180	2.0 (even)

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

air (Monthly Average Temperature Anomalies, 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 -2.8401408e+9, 1.738368e+9;
    String avg_period "0000-01-00 00:00:00";
    String axis "T";
    String delta_t "0000-01-00 00:00:00";
    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 -89.0, 89.0;
    String axis "Y";
    String coordinate_defines "center";
    String ioos_category "Location";
    String long_name "Latitude";
    String standard_name "latitude";
    String units "degrees_north";
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float32 actual_range 1.0, 359.0;
    String axis "X";
    String coordinate_defines "center";
    String ioos_category "Location";
    String long_name "Longitude";
    String standard_name "longitude";
    String units "degrees_east";
  }
  air {
    Float32 actual_range -19.917105, 19.78792;
    String cell_methods "time: anomaly (monthly from values)";
    Float64 colorBarMaximum 10.0;
    Float64 colorBarMinimum -10.0;
    String comments "ERSST V5 used for SST (starting Oct 25 2017 at PSD) from previous ERSST v4";
    String ioos_category "Temperature";
    Int16 least_significant_digit 2;
    String level_desc "Surface";
    String long_name "Monthly Average Temperature Anomalies";
    Float32 missing_value 9999.0;
    String parent_stat "Individual obs";
    Int16 precision 2;
    String standard_name "air_temperature_anomaly";
    String statistic "Anomaly";
    String units "degree_C";
    Float32 valid_range -25.0, 25.0;
    String var_desc "Air Temperature: 250km smoothing combined";
  }
  NC_GLOBAL {
    String _NCProperties "version=2,netcdf=4.6.2,hdf5=1.8.20";
    String cdm_data_type "Grid";
    String comment "This is the 1200km smoothed combined land,ocean version of the dataset on a 2x2 grid. SST dataset used at NASA is now ERSST V5";
    String Conventions "COARDS, CF-1.6, ACDD-1.3";
    String creator_name "NOAA PSL";
    String creator_type "institution";
    String creator_url "https://www.noaa.gov/";
    String data_modified "2025-03-11";
    String dataset_title "GISS Surface Temperature Analysis";
    String Documentation "https://www.esrl.noaa.gov/psd/data/gridded/data.gistemp.html";
    Float64 Easternmost_Easting 359.0;
    Float64 geospatial_lat_max 89.0;
    Float64 geospatial_lat_min -89.0;
    Float64 geospatial_lat_resolution 2.0;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max 359.0;
    Float64 geospatial_lon_min 1.0;
    Float64 geospatial_lon_resolution 2.0;
    String geospatial_lon_units "degrees_east";
    String history 
"created at PSD Jun 2009 by CAS. Converted to chunked, deflated non-packed NetCDF4 2014/06
2025-03-29T07:21:08Z https://psl.noaa.gov/thredds/dodsC/Datasets/gistemp/combined/250km/air.2x2.250.mon.anom.comb.nc
2025-03-29T07:21:08Z http://upwell.pfeg.noaa.gov/erddap/griddap/noaa_psl_8e1a_e56c_5366.das";
    String id "Datasets/gistemp/combined/250km/air.2x2.250.mon.anom.comb.nc";
    String infoUrl "https://www.psl.noaa.gov/data/gridded/data.gistemp.html";
    String institution "NOAA PSL";
    String keywords "250km, air, air.2x2.250.mon.anom.comb, air_temperature_anomaly, analysis, anomalies, anomaly, atmosphere, atmospheric, average, combined, data, earth, Earth Science > Atmosphere > Atmospheric Temperature > Temperature Anomalies, giss, gistemp, goddard, institute, land, latitude, longitude, month, monthly, noaa, ocean, psl, science, sea, smoothing, space, sst, studies, surface, temperature, time";
    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 89.0;
    String platform "Analysis";
    String references "https://www.psl.noaa.gov/data/gridded/data.gistemp.html";
    String source "https://data.giss.nasa.gov/gistemp/ source and https://data.giss.nasa.gov/pub/gistemp/ data";
    String sourceUrl "https://psl.noaa.gov/thredds/dodsC/Datasets/gistemp/combined/250km/air.2x2.250.mon.anom.comb.nc";
    Float64 Southernmost_Northing -89.0;
    String standard_name_vocabulary "CF Standard Name Table v70";
    String summary "Goddard Institute for Space Studies (GISS) Surface Temperature Analysis (GISTEMP): 250km smoothing combined land/ocean. This is the 1200km smoothed combined land,ocean version of the dataset on a 2x2 grid. Sea Surface Temperature (SST) dataset used at NASA is now ERSST V5";
    String testOutOfDate "now-130days";
    String time_coverage_end "2025-02-01T00:00:00Z";
    String time_coverage_start "1880-01-01T00:00:00Z";
    String title "GISTEMP: 250km smoothing combined land/ocean (air.2x2.250.mon.anom.comb), 2.0°, 1880-present";
    String update_date "03/2025";
    Float64 Westernmost_Easting 1.0;
  }
}

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.