Data Access Form

Dataset Title:	4x daily NMC reanalysis (surface, slp.mon.inter.std)
Institution:	NOAA NCEP, NCAR (Dataset ID: noaa_pmel_4cd5_bbff_9433)
Information:	Summary \| License \| FGDC \| ISO 19115 \| Metadata \| Background \| Make a graph

Dimensions	Size	Spacing
time (UTC)	12	30 days 8h 43m 38s (uneven)

latitude (degrees_north)	73	-2.5 (even)

longitude (degrees_east)	144	2.5 (even)

Grid Variables (which always also download all of the dimension variables)
slp (Interannual Standard Deviation of Sea Level Pressure by Month, millibars)

File type: more info
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(Please be patient. It may take a while to get the data.)

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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 "0029-00-00 00:00:00";
    String axis "T";
    String delta_t "0000-01-00 00:00:00";
    String ioos_category "Time";
    String long_name "Time";
    Float64 ltm_range 1.7242392e+7, 1.749588e+7;
    String prev_avg_period "0000-00-00 06:00:00";
    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 90.0, -90.0;
    String axis "Y";
    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, 357.5;
    String axis "X";
    String ioos_category "Location";
    String long_name "Longitude";
    String standard_name "longitude";
    String units "degrees_east";
  }
  slp {
    String _CoordinateAxes "time lat lon";
    Float32 actual_range 0.3133093, 9.969652;
    Float64 colorBarMaximum 50.0;
    Float64 colorBarMinimum 0.0;
    String dataset "CDC Derived NCEP Reanalysis Products";
    String drawLandMask "under";
    String ioos_category "Statistics";
    Int16 least_significant_digit 1;
    String level_desc "Sea Level";
    String long_name "Interannual Standard Deviation of Sea Level Pressure by Month";
    Float32 missing_value -9.96921E36;
    String parent_stat "Other";
    Int16 precision 2;
    String statistic "Interannual Standard Deviation";
    String units "millibars";
    Float32 valid_range -102.2, 102.2;
    String var_desc "Sea Level Pressure";
  }
  NC_GLOBAL {
    String cdm_data_type "Grid";
    String Conventions "COARDS, CF-1.6, Unidata Dataset Discovery v1.0";
    String creator_email "Wesley.Ebisuzaki@noaa.gov";
    String creator_name "NOAA NCEP, NCAR";
    String creator_url "http://www.cpc.ncep.noaa.gov/products/wesley/reanalysis.html";
    String description 
"Data is from NMC initialized reanalysis
(4x/day).  These are the 0.9950 sigma level values.";
    Float64 Easternmost_Easting 357.5;
    Float64 geospatial_lat_max 90.0;
    Float64 geospatial_lat_min -90.0;
    Float64 geospatial_lat_resolution 2.5;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max 357.5;
    Float64 geospatial_lon_min 0.0;
    Float64 geospatial_lon_resolution 2.5;
    String geospatial_lon_units "degrees_east";
    String history 
"Created at NOAA-CIRES Climate Diagnostics Center by CAS
STD is defined as the sum of the sqrt((monthly_mean-total_mon_mean)**2) where
climo is 1968-1996
2013-03-05T02:00:51Z http://ferret.pmel.noaa.gov/geoide/dodsC/Datasets/ncep.reanalysis.derived/surface/slp.mon.inter.std.nc
2013-03-05T02:00:51Z http://upwell.pfeg.noaa.gov/erddap/griddap/noaa_pmel_4cd5_bbff_9433.das";
    String infoUrl "http://ferret.pmel.noaa.gov/geoide/dodsC/Datasets/ncep.reanalysis.derived/surface/slp.mon.inter.std.nc.html";
    String institution "NOAA NCEP, NCAR";
    String keywords 
"daily, deviation, interannual, level, month, ncar, ncep, nmc, noaa, pressure,
reanalysis, sea, slp.mon.inter.std, standard, statistics, surface";
    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 Metadata_Conventions "COARDS, CF-1.6, Unidata Dataset Discovery v1.0";
    Float64 Northernmost_Northing 90.0;
    String platform "Model";
    String references "http://www.esrl.noaa.gov/psd/data/gridded/data.ncep.reanalysis.derived.html";
    String sourceUrl "http://ferret.pmel.noaa.gov/geoide/dodsC/Datasets/ncep.reanalysis.derived/surface/slp.mon.inter.std.nc";
    Float64 Southernmost_Northing -90.0;
    String standard_name_vocabulary "CF-12";
    String summary 
"Data is from NMC initialized reanalysis
(4x/day).  These are the 0.9950 sigma level values.";
    String time_coverage_end "0001-12-01T00:00:00Z";
    String time_coverage_start "0001-01-01T00:00:00Z";
    String title "4x daily NMC reanalysis (surface, slp.mon.inter.std)";
    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 Data Access Protocol (DAP) and its projection constraints.

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
http://upwell.pfeg.noaa.gov/erddap/griddap/datasetID.fileType{?query}
For example,
http://upwell.pfeg.noaa.gov/erddap/griddap/erdBAssta5day.htmlTable?sst[(2007-10-21T00:00:00)][0][(-75):100:(75)][(180):100:(360)]
Thus, the query is often a variable name (e.g., sst),
followed by a set of [] for each of the variable's dimensions
(for example, [time][altitude][latitude][longitude]),
with your desired (start):stride:(stop) values within each [].

For details, see the griddap Documentation.

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