ERDDAP: CoastWatch Caribbean and Gulf of America Regional Node at NOAA/AOML
Easier access to scientific data

Data Access Form This Data Access Form helps you download a subset of the data from a dataset with multi-dimensional gridded data via the OPeNDAP protocol. In gridded datasets, all grid variables (the multi-dimensional variables) share the same dimension variables. Each dimension variable is a one dimensional array of values.
To download gridded data:

Select (check) one or more grid variables that you want to download.
(Or, to download just dimension data, select one or more dimension variables.)
Specify the subset of data that you want by specifying the dimension subsets (`Start:Stride:Stop`).
For `File type`, choose one of the non-image file types (anything but .geotif, .kml, .pdf, or .png).
This web page just simplifies the creation of griddap URLs.
If you want, you can create these URLs by hand or have a computer program do it.
Then you don\'t have to use this form to get data. See the \'Bypass this form\' link below.

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Dataset Title:	EXPERIMENTAL. AOML SEASONAL Global Carbon Fluxes
Institution:	NOAA AOML OCD (Dataset ID: aomlcarbonfluxes_season)
Information:	Summary Experimental SEASONAL Global Carbon Fluxes cdm_data_type = Grid VARIABLES (all of which use the dimensions [time][latitude][longitude]): flux (Seasonal Sea-Air Carbon Flux, molm-2Season-1) flux_anom (Seasonal Sea-Air Carbon Flux Anom, molm-2Season-1) difco2 (Surface Water-Atmospheric Part Press Diff, uatm) difco2_anom (Surface Water-Atmospheric Part Press Diff Anom, uatm) ')" onmouseout="UnTip()" > \| 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.')" onmouseout="UnTip()" > \| FGDC \| ISO 19115 \| Metadata \| Background \| Make a graph

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Dimensions	Size	Spacing For your information: this is the average spacing between values of a dimension (in the units of the dimension) and an indication of whether the values are perfectly evenly spaced or not. A slightly odd, uneven spacing often indicates that one or a few files are missing or bad in an otherwise perfectly evenly spaced dataset.')" onmouseout="UnTip()" >
time (UTC) Float64 time[140] { String _CoordinateAxisType "Time"; Float64 actual_range 3.799008e+8, 1.4764896e+9; String axis "T"; 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"; } ')" onmouseout="UnTip()" >	140	91 days 7h 25m 28s (uneven)

latitude (degrees_north) Float32 latitude[45] { String _CoordinateAxisType "Lat"; Float32 actual_range -88.0, 88.0; String axis "Y"; String ioos_category "Location"; String long_name "Latitude"; String standard_name "latitude"; String units "degrees_north"; } ')" onmouseout="UnTip()" >	45	4.0 (even)

longitude (degrees_east) Float32 longitude[72] { String _CoordinateAxisType "Lon"; Float32 actual_range -177.5, 177.5; String axis "X"; String ioos_category "Location"; String long_name "Longitude"; String standard_name "longitude"; String units "degrees_east"; } ')" onmouseout="UnTip()" >	72	5.0 (even)

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

flux (Seasonal Sea-Air Carbon Flux, molm-2Season-1)

  Float32 flux[time][latitude][longitude] {
    Float32 _FillValue NaN;
    Float32 actual_range -1.6593266, 1.1770917;
    Float64 colorBarMaximum 3.0;
    Float64 colorBarMinimum -3.0;
    String coordsys "geographic";
    String ioos_category "Other";
    String long_name "Seasonal Sea-Air Carbon Flux";
    String units "molm-2Season-1";
  }
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flux_anom (Seasonal Sea-Air Carbon Flux Anom, molm-2Season-1)

  Float32 flux_anom[time][latitude][longitude] {
    Float32 _FillValue NaN;
    Float32 actual_range -1.0807687, 0.5569955;
    Float64 colorBarMaximum 3.0;
    Float64 colorBarMinimum -3.0;
    String coordsys "geographic";
    String ioos_category "Other";
    String long_name "Seasonal Sea-Air Carbon Flux Anom";
    String units "molm-2Season-1";
  }
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difco2 (Surface Water-Atmospheric Part Press Diff, uatm)

  Float32 difco2[time][latitude][longitude] {
    Float32 _FillValue NaN;
    Float32 actual_range -196.65083, 133.129;
    Float64 colorBarMaximum 100.0;
    Float64 colorBarMinimum -100.0;
    String coordsys "geographic";
    String ioos_category "Other";
    String long_name "Surface Water-Atmospheric Part Press Diff";
    String units "uatm";
  }
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difco2_anom (Surface Water-Atmospheric Part Press Diff Anom, uatm)

  Float32 difco2_anom[time][latitude][longitude] {
    Float32 _FillValue NaN;
    Float32 actual_range -117.72125, 62.625446;
    Float64 colorBarMaximum 100.0;
    Float64 colorBarMinimum -100.0;
    String coordsys "geographic";
    String ioos_category "Other";
    String long_name "Surface Water-Atmospheric Part Press Diff Anom";
    String units "uatm";
  }
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File type: (more information)

(Documentation / Bypass this form) Optional: Bypass This Form
griddap lets you request data by sending a specially formed URL to the server. The URL identifies a dataset, the desired file type for the response, and the subset of data that you want to receive. This Data Access Form simplifies this task: when you click on the Submit button below, the URL is generated and sent to the server. If you click on Just generate the URL, you can see the URL that the form generates, without sending the URL to the server.

If you learn how to form the URLs, you won\'t have to use this form to get data.
You can write a computer program or script that automatically generates URLs, sends them to ERDDAP, and gets the data. For more information on forming the URLs, click on the Bypass this form link to see the griddap documentation.')" onmouseout="UnTip()" >

(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 3.799008e+8, 1.4764896e+9;
    String axis "T";
    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 -88.0, 88.0;
    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 -177.5, 177.5;
    String axis "X";
    String ioos_category "Location";
    String long_name "Longitude";
    String standard_name "longitude";
    String units "degrees_east";
  }
  flux {
    Float32 _FillValue NaN;
    Float32 actual_range -1.6593266, 1.1770917;
    Float64 colorBarMaximum 3.0;
    Float64 colorBarMinimum -3.0;
    String coordsys "geographic";
    String ioos_category "Other";
    String long_name "Seasonal Sea-Air Carbon Flux";
    String units "molm-2Season-1";
  }
  flux_anom {
    Float32 _FillValue NaN;
    Float32 actual_range -1.0807687, 0.5569955;
    Float64 colorBarMaximum 3.0;
    Float64 colorBarMinimum -3.0;
    String coordsys "geographic";
    String ioos_category "Other";
    String long_name "Seasonal Sea-Air Carbon Flux Anom";
    String units "molm-2Season-1";
  }
  difco2 {
    Float32 _FillValue NaN;
    Float32 actual_range -196.65083, 133.129;
    Float64 colorBarMaximum 100.0;
    Float64 colorBarMinimum -100.0;
    String coordsys "geographic";
    String ioos_category "Other";
    String long_name "Surface Water-Atmospheric Part Press Diff";
    String units "uatm";
  }
  difco2_anom {
    Float32 _FillValue NaN;
    Float32 actual_range -117.72125, 62.625446;
    Float64 colorBarMaximum 100.0;
    Float64 colorBarMinimum -100.0;
    String coordsys "geographic";
    String ioos_category "Other";
    String long_name "Surface Water-Atmospheric Part Press Diff Anom";
    String units "uatm";
  }
  NC_GLOBAL {
    String cdm_data_type "Grid";
    String Conventions "COARDS, CF-1.0, Unidata Dataset Discovery v1.0";
    Float64 Easternmost_Easting 177.5;
    Float64 geospatial_lat_max 88.0;
    Float64 geospatial_lat_min -88.0;
    Float64 geospatial_lat_resolution 4.0;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max 177.5;
    Float64 geospatial_lon_min -177.5;
    Float64 geospatial_lon_resolution 5.0;
    String geospatial_lon_units "degrees_east";
    String history 
"2025-05-03T01:43:32Z http://cwcgom.aoml.noaa.gov/thredds/dodsC/GLOBAL_SEASON_CARBON_FLUXES/FLUXES.nc
2025-05-03T01:43:32Z http://cwcgom.aoml.noaa.gov:8080/erddap/griddap/aomlcarbonfluxes_season.das";
    String infoUrl "http://www.aoml.noaa.gov/ocd/gcc/index.php";
    String institution "NOAA AOML OCD";
    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.";
    Int32 nco_openmp_thread_number 1;
    Int32 node_offset 0;
    Float64 Northernmost_Northing 88.0;
    String sourceUrl "http://cwcgom.aoml.noaa.gov/thredds/dodsC/GLOBAL_SEASON_CARBON_FLUXES/FLUXES.nc";
    Float64 Southernmost_Northing -88.0;
    String standard_name_vocabulary "CF-1.0";
    String summary "Experimental SEASONAL Global Carbon Fluxes";
    String time_coverage_end "2016-10-15T00:00:00Z";
    String time_coverage_start "1982-01-15T00:00:00Z";
    String title "EXPERIMENTAL. AOML SEASONAL Global Carbon Fluxes";
    Float64 Westernmost_Easting -177.5;
  }
}

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
http://coastwatch.pfeg.noaa.gov/erddap/griddap/datasetID.fileType{?query}
For example,
http://coastwatch.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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