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Dataset Title:  IPCC Datasets, ipcc ar4 CM2.1U-D4 1860-2000-AllForc H2 atmos, ipcc ar4 CM2.1U-
D4 1860-2000-AllForc H2 atmos monthly, ipcc ar4 20C3M-1 monthly 18610101-
20001231, hur
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Institution:  NOAA GFDL   (Dataset ID: noaa_gfdl_7e4b_bf0e_5a1c)
Information:  Summary ? | License ? | FGDC | ISO 19115 | Metadata | Background (external link) | Make a graph
 
Dimensions ? Start ? Stride ? Stop ?  Size ?    Spacing ?
 time (UTC) ?      1680    30 days 9h 59m 30s (uneven)
  < slider >
 plev (pressure, Pa) ?      17    -6187.5 (uneven)
  < slider >
 latitude (degrees_north) ?      90    2.01111 (uneven)
  < slider >
 longitude (degrees_east) ?      144    2.5 (even)
  < slider >
 
Grid Variables (which always also download all of the dimension variables)
 hur (Relative Humidity, percent) ?

File type: (more info)

(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 -3.4383312e+9, 9.740304e+8;
    String axis "T";
    String calendar "noleap";
    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";
  }
  plev {
    Float64 actual_range 1000.0, 100000.0;
    String axis "Z";
    String ioos_category "Pressure";
    String long_name "pressure";
    String positive "down";
    String standard_name "air_pressure";
    String units "Pa";
  }
  latitude {
    String _CoordinateAxisType "Lat";
    Float64 actual_range -89.494384765625, 89.494384765625;
    String axis "Y";
    String ioos_category "Location";
    String long_name "Latitude";
    String standard_name "latitude";
    String units "degrees_north";
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float64 actual_range 1.25, 358.75;
    String axis "X";
    String ioos_category "Location";
    String long_name "Longitude";
    String standard_name "longitude";
    String units "degrees_east";
  }
  hur {
    Float32 _FillValue 1.0e+20;
    String cell_methods "time: mean";
    Float64 colorBarMaximum 100.0;
    Float64 colorBarMinimum 0.0;
    String history "At   14:10:18 on 01/03/2005: CMOR altered the data in the following ways: replaced missing value flag (-9.99000E+02) with standard missing value (1.00000E+20);";
    String ioos_category "Meteorology";
    String long_name "Relative Humidity";
    Float32 missing_value 1.0e+20;
    String original_name "rh";
    String standard_name "relative_humidity";
    String units "percent";
  }
  NC_GLOBAL {
    String cdm_data_type "Grid";
    Float32 cmor_version 0.94;
    String comment "GFDL experiment name = CM2.1U-D4_1860-2000-AllForc_H2. PCMDI experiment name = 20C3M (run2). Initial conditions for this experiment were taken from 1 January of year 41 of the 1860 control model experiment named CM2.1U_Control-1860_D4. Several forcing agents varied during the 140 year duration of the CM2.1U-D4_1860-2000-AllForc_H2 experiment in a manner based upon observations and reconstructions for the late 19th and 20th centuries. The time varying forcing agents were atmospheric CO2, CH4, N2O, halons, tropospheric and stratospheric O3, anthropogenic tropospheric sulfates, black and organic carbon, volcanic aerosols, solar irradiance, and the distribution of land cover types. The direct effect of tropospheric aerosols is calculated by the model, but not the indirect effects.";
    String contact "GFDL.Climate.Model.Info@noaa.gov";
    String Conventions "CF-1.6, COARDS, ACDD-1.3";
    String creator_email "GFDL.Climate.Model.Info@noaa.gov";
    String creator_name "NOAA GFDL";
    String creator_type "institution";
    String creator_url "https://www.gfdl.noaa.gov/";
    Float64 Easternmost_Easting 358.75;
    String experiment_id "climate of the 20th Century experiment (20C3M)";
    Float64 geospatial_lat_max 89.494384765625;
    Float64 geospatial_lat_min -89.494384765625;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max 358.75;
    Float64 geospatial_lon_min 1.25;
    Float64 geospatial_lon_resolution 2.5;
    String geospatial_lon_units "degrees_east";
    String gfdl_experiment_name "CM2.1U-D4_1860-2000-AllForc_H2";
    String history 
"input/atmos.186101-200012.rh.nc  At 14:10:18 on 01/03/2005, CMOR rewrote data to comply with CF standards and IPCC Fourth Assessment and US CCSP Projects requirements
2018-02-22T23:00:00Z http://data1.gfdl.noaa.gov:8380/thredds/dodsC/hur_monthly_20C3M-1_R2_18610101-20001231
2018-02-22T23:00:00Z http://upwell.pfeg.noaa.gov/erddap/griddap/noaa_gfdl_7e4b_bf0e_5a1c.das";
    String id "hur_monthly_20C3M-1_R2_18610101-20001231";
    String infoUrl "http://data1.gfdl.noaa.gov:8380/thredds/dodsC/hur_monthly_20C3M-1_R2_18610101-20001231.html";
    String institution "NOAA GFDL";
    String keywords "1860-2000-allforc, 18610101-20001231, 20c3m, 20c3m-1, 20th, allforc, ar4, assessment, atmosphere, atmospheric, ccsp, century, change, climate, cm2.1, cm2.1u, cm2.1u-d4, data, datasets, diagnosis, dynamics, earth, Earth Science > Atmosphere > Atmospheric Water Vapor > Humidity, experiment, fluid, fourth, geophysical, gfdl, humidity, hur, intercomparison, intergovernmental, ipcc, laboratory, latitude, longitude, meteorology, model, month, monthly, noaa, output, panel, pcmdi, plev, program, relative, relative_humidity, report, run2, science, time, US, vapor, water";
    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 89.494384765625;
    String project_id "IPCC Fourth Assessment and US CCSP Projects";
    Int32 realization 2;
    String references "The GFDL Data Portal (http://nomads.gfdl.noaa.gov/) provides access to NOAA/GFDL's publicly available model input and output data sets. From this web site one can view and download data sets and documentation, including those related to the GFDL CM2.1 model experiments run for the IPCC's 4th Assessment Report and the US CCSP.";
    String source "GFDL_CM2.1 (2004): atmosphere: AM2.1 (am2p13fv, M45L24); ocean: OM3.1 (mom4p1p7_om3p5, tripolar360x200L50); sea ice: SIS; land: LM2; infrastructure: FMS preK release";
    String sourceUrl "http://data1.gfdl.noaa.gov:8380/thredds/dodsC/hur_monthly_20C3M-1_R2_18610101-20001231";
    Float64 Southernmost_Northing -89.494384765625;
    String standard_name_vocabulary "CF Standard Name Table v29";
    String summary "Geophysical Fluid Dynamics Laboratory (GFDL) CM2.1, 20C3M (run2) climate of the 20th Century experiment (20C3M) output for Intergovernmental Panel on Climate Change (IPCC) Fourth Assessment Report (AR4) and US Climate Change Science Program (CCSP). GFDL experiment name = CM2.1U-D4_1860-2000-AllForc_H2. Program for Climate Model Diagnosis and Intercomparison (PCMDI) experiment name = 20C3M (run2). Initial conditions for this experiment were taken from 1 January of year 41 of the 1860 control model experiment named CM2.1U_Control-1860_D4. Several forcing agents varied during the 140 year duration of the CM2.1U-D4_1860-2000-AllForc_H2 experiment in a manner based upon observations and reconstructions for the late 19th and 20th centuries. The time varying forcing agents were atmospheric CO2, CH4, N2O, halons, tropospheric and stratospheric O3, anthropogenic tropospheric sulfates, black and organic carbon, volcanic aerosols, solar irradiance, and the distribution of land cover types. The direct effect of tropospheric aerosols is calculated by the model, but not the indirect effects.";
    String table_id "Table A1 (20 September 2004)";
    String time_coverage_end "2000-11-12T12:00:00Z";
    String time_coverage_start "1861-01-16T12:00:00Z";
    String title "IPCC Datasets, ipcc ar4 CM2.1U-D4 1860-2000-AllForc H2 atmos, ipcc ar4 CM2.1U-D4 1860-2000-AllForc H2 atmos monthly, ipcc ar4 20C3M-1 monthly 18610101-20001231, hur";
    Float64 Westernmost_Easting 1.25;
  }
}

 

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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