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Dataset Title:  4x Daily NOAA-CIRES 20th Century Reanalysis V2c (Top Dataset, monolevel, snowc.
mon.mean), 1851-2014
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Institution:  325 Broadway R/PSD1, Boulder, CO 80305   (Dataset ID: noaa_esrl_4ade_3a8f_4e89)
Information:  Summary ? | License ? | FGDC | ISO 19115 | Metadata | Background (external link) | Make a graph
 
Dimensions ? Start ? Stride ? Stop ?  Size ?    Spacing ?
 time (UTC) ?      1968    30 days 10h 28m 51s (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)
 snowc (Monthly Snow Cover Spread at Surface, 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 -3.7552896e+9, 1.417392e+9;
    String avg_period "0000-01-00 00:00:00";
    String axis "T";
    String coordinate_defines "start";
    String delta_t "0000-01-00 00:00:00";
    String ioos_category "Time";
    String long_name "Time";
    String prev_avg_period "0000-00-01 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";
  }
  snowc {
    Float32 actual_range 0.0, 48.25966;
    String cell_methods "time: mean (monthly from 3-hourly values)";
    Float64 colorBarMaximum 100.0;
    Float64 colorBarMinimum 0.0;
    String datum "wgs84";
    Int16 GRIB_id 238;
    String GRIB_name "SNOWC";
    String ioos_category "Ice Distribution";
    String level_desc "Surface";
    String long_name "Monthly Snow Cover Spread at Surface";
    Float32 missing_value -9.96921e+36;
    String parent_stat "Individual Obs";
    Int16 precision 3;
    String statistic "Ensemble Spread";
    String statistic_method "Standard deviation calculated by taking standard deviation of the 56 ensemble members at each time step and then averaging STD over all time steps in a month";
    String units "percent";
    Float32 valid_range 0.0, 65.53;
    String var_desc "snow cover";
  }
  NC_GLOBAL {
    String assimilation_algorithm "Ensemble Kalman Filter";
    String cdm_data_type "Grid";
    String citation 
"Compo,G.P. <https://www.esrl.noaa.gov/psd/people/gilbert.p.compo/>, 
J.S. Whitaker <https://www.esrl.noaa.gov/psd/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
<http://onlinelibrary.wiley.com/doi/10.1002/qj.776/abstract/>.
Quarterly J. Roy. Meteorol. Soc./, 137, 1-28. DOI: 10.1002/qj.776/.";
    String comment 
"Data is from 
NOAA-CIRES 20th Century Reanalysis version 2c
(4x/day).  It consists of most variables interpolated to
pressure surfaces from model (sigma) surfaces.  
On 2015/11/16, replaced time steps 3Z on 18 Aug 1855, 6Z on 8 May 1910, 3Z on 22 May 1950, and 9Z on 2 Jun 1990.";
    String contact "esrl.psd.data@noaa.gov";
    String Conventions "CF-1.6, COARDS, ACDD-1.3";
    String creation_date "2014-06-13T18:30:07Z";
    String creator_email "esrl.psd.data@noaa.gov";
    String creator_name "NOAA ESRL PSD";
    String creator_type "institution";
    String creator_url "https://www.esrl.noaa.gov/psd/";
    String dataset_title "NOAA-CIRES 20th Century Reanalysis (V2c)";
    Float64 Easternmost_Easting 358.125;
    String forcing 
"CO2, Sl, Vl, SST, 0z (0z is prognostic, SST is SODAsi.2c through 2012 and NOAA OI V2 from 2013, Sl starts in 1944 
repeating 11 year solar cycle prior, Vl is Sato et al. 1993)";
    String forcing_note 
"Additional information on the external forcings uses in this 
reanalysis can be found at https://dx.doi.org/10.1002/qj.77";
    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 2015/02 by Hoop (chunked, deflated non-packed netCDF4-Classic)
esrl.psd.data@noaa.gov
2018-04-20T14:39:52Z https://www.esrl.noaa.gov/psd/thredds/dodsC/Datasets/20thC_ReanV2c/Monthlies/gaussian_sprd/monolevel/snowc.mon.mean.nc
2018-04-20T14:39:52Z http://upwell.pfeg.noaa.gov/erddap/griddap/noaa_esrl_4ade_3a8f_4e89.das";
    String id "Datasets/20thC_ReanV2c/Monthlies/gaussian_sprd/monolevel/snowc.mon.mean.nchttps://www.esrl.noaa.gov/psd/thredds/dodsC/Datasets/20thC_ReanV2c/Monthlies/gaussian_sprd/monolevel/snowc.mon.mean.nc";
    String infoUrl "https://www.esrl.noaa.gov/psd/data/gridded/data.20thC_ReanV2c.html";
    String institution "325 Broadway R/PSD1, Boulder, CO 80305";
    String keywords "20th, boulder, broadway, century, cires, cooperative, cover, daily, data, dataset, day, distribution, environmental, ice, ice distribution, institute, latitude, longitude, monolevel, month, monthly, noaa, noaa-cires, psd1, reanalysis, research, sciences, snow, snowc, snowc.mon.mean, spread, surface, time, top, v2c";
    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.";
    String name_of_model_used "ensda_v351";
    Float64 Northernmost_Northing 88.542;
    String observations "International Surface Pressure Databank version 3.2.9";
    String platform "Model";
    String product "reanalysis";
    String references "https://www.esrl.noaa.gov/psd/data/gridded/data.20thC_ReanV2c.html";
    String source 
"20CRv2c 2014, Ensemble Kalman Filter, ocean (specified): SODAsi.2c; 
atmosphere: NCEP GFS2008ex; sea ice (specified): COBE-SST2 sea ice; 
land: Noah; version 2";
    String sourceUrl "https://www.esrl.noaa.gov/psd/thredds/dodsC/Datasets/20thC_ReanV2c/Monthlies/gaussian_sprd/monolevel/snowc.mon.mean.nc";
    Float64 Southernmost_Northing -88.542;
    String standard_name_vocabulary "CF Standard Name Table v29";
    String summary 
"4x Daily NOAA-Cooperative Institute for Research in Environmental Sciences (CIRES) 20th Century Reanalysis V2c. Data is from 
NOAA-CIRES 20th Century Reanalysis version 2c
(4x/day).  It consists of most variables interpolated to
pressure surfaces from model (sigma) surfaces.  
On 2015/11/16, replaced time steps 3Z on 18 Aug 1855, 6Z on 8 May 1910, 3Z on 22 May 1950, and 9Z on 2 Jun 1990.";
    String time_coverage_end "2014-12-01T00:00:00Z";
    String time_coverage_start "1851-01-01T00:00:00Z";
    String title "4x Daily NOAA-CIRES 20th Century Reanalysis V2c (Top Dataset, monolevel, snowc.mon.mean), 1851-2014";
    String version "2c";
    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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