BCO-DMO ERDDAP
Accessing BCO-DMO data

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Dataset Title:	[Coastal DOM Galveston Bay] - Biochemical data on dissolved organic matter composition from Galveston Bay collected on five one-day trips aboard R/V Trident following Hurricane Harvey from September 4 to 28, 2017 (Collaborative Research: Distribution and Cycling of Carboxyl-Rich Alicyclic Molecules (CRAM) in the Ocean)
Institution:	BCO-DMO (Dataset ID: bcodmo_dataset_982177_v1)
Range:	longitude = -94.9789 to -94.6886°E, latitude = 29.33278 to 29.6725°N
Information:	Summary \| License \| FGDC \| ISO 19115 \| Metadata \| Background \| Data Access Form \| Files

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The Dataset Attribute Structure (.das) for this Dataset

Attributes {
 s {
  Date {
    String long_name "Date";
    String units "unitless";
  }
  Station {
    String long_name "Station";
    String units "unitless";
  }
  latitude {
    String _CoordinateAxisType "Lat";
    Float32 actual_range 29.33278, 29.6725;
    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 -94.9789, -94.6886;
    String axis "X";
    String ioos_category "Location";
    String long_name "Long";
    String standard_name "longitude";
    String units "degrees_east";
  }
  Salinity {
    Float32 actual_range 0.0, 22.55;
    String long_name "Salinity";
    String units "psu";
  }
  DOC {
    Int32 actual_range 240, 566;
    String long_name "Doc";
    String units "micromoles per liter (umol L-1)";
  }
  a254 {
    Float32 actual_range 18.5, 67.2;
    String long_name "A254";
    String units "per meter (m-1)";
  }
  SUVA {
    Float32 actual_range 2.74, 4.3;
    String long_name "Suva";
    String units "L mgC-1  m-1";
  }
  S275_295 {
    Float32 actual_range 0.013, 0.019;
    String long_name "S275_295";
    String units "unitless";
  }
  S350_400 {
    Float32 actual_range 0.013, 0.018;
    String long_name "S350_400";
    String units "unitless";
  }
  SR {
    Float32 actual_range 0.82, 1.18;
    String long_name "Sr";
    String units "unitless";
  }
  HIX {
    Float32 actual_range 2.68, 8.3;
    String long_name "Hix";
    String units "unitless";
  }
  BIX {
    Float32 actual_range 0.58, 0.85;
    String long_name "Bix";
    String units "unitless";
  }
  FI {
    Float32 actual_range 1.13, 1.22;
    String long_name "Fi";
    String units "unitless";
  }
  C1 {
    Float32 actual_range 0.18, 0.76;
    String long_name "C1";
    String units "Raman units";
  }
  C2 {
    Float32 actual_range 0.08, 0.38;
    String long_name "C2";
    String units "Raman units";
  }
  C3 {
    Float32 actual_range 0.12, 0.42;
    String long_name "C3";
    String units "Raman units";
  }
  C4 {
    Float32 actual_range 0.05, 0.51;
    String long_name "C4";
    String units "Raman units";
  }
  PAL {
    Float32 actual_range 11.2, 52.5;
    String long_name "Pal";
    String units "nanomoles per liter (nmol L-1)";
  }
  PON {
    Float32 actual_range 5.4, 25.1;
    String long_name "Pon";
    String units "nanomoles per liter (nmol L-1)";
  }
  PAD {
    Float32 actual_range 11.8, 51.4;
    String long_name "Pad";
    String units "nanomoles per liter (nmol L-1)";
  }
  VAL {
    Float32 actual_range 26.2, 244.9;
    String long_name "Val";
    String units "nanomoles per liter (nmol L-1)";
  }
  VON {
    Float32 actual_range 11.8, 100.6;
    String long_name "Von";
    String units "nanomoles per liter (nmol L-1)";
  }
  VAD {
    Float32 actual_range 18.0, 186.9;
    String long_name "Vad";
    String units "nanomoles per liter (nmol L-1)";
  }
  SAL {
    Float32 actual_range 13.3, 99.6;
    String long_name "Sal";
    String units "nanomoles per liter (nmol L-1)";
  }
  SON {
    Float32 actual_range 4.5, 32.3;
    String long_name "Son";
    String units "nanomoles per liter (nmol L-1)";
  }
  SAD {
    Float32 actual_range 5.5, 41.4;
    String long_name "Sad";
    String units "nanomoles per liter (nmol L-1)";
  }
  CAD {
    Float32 actual_range 3.0, 17.0;
    String long_name "Cad";
    String units "nanomoles per liter (nmol L-1)";
  }
  FAD {
    Float32 actual_range 2.8, 20.2;
    String long_name "Fad";
    String units "nanomoles per liter (nmol L-1)";
  }
  TDLP9 {
    Int32 actual_range 109, 832;
    String long_name "Tdlp9";
    String units "nanomoles per liter (nmol L-1)";
  }
  P_V {
    Float32 actual_range 0.24, 0.57;
    String long_name "P_v";
    String units "unitless";
  }
  S_V {
    Float32 actual_range 0.32, 0.48;
    String long_name "S_v";
    String units "unitless";
  }
  C_V {
    Float32 actual_range 0.06, 0.13;
    String long_name "C_v";
    String units "unitless";
  }
  Ad_AlV {
    Float32 actual_range 0.64, 0.88;
    String long_name "Ad_alv";
    String units "unitless";
  }
  Ad_AlS {
    Float32 actual_range 0.39, 0.52;
    String long_name "Ad_als";
    String units "unitless";
  }
  His {
    Int32 actual_range 8, 43;
    String long_name "His";
    String units "nanomoles per liter (nmol L-1)";
  }
  Thr {
    Int32 actual_range 45, 229;
    String long_name "Thr";
    String units "nanomoles per liter (nmol L-1)";
  }
  Gly {
    Int32 actual_range 184, 711;
    String long_name "Gly";
    String units "nanomoles per liter (nmol L-1)";
  }
  Arg {
    Int32 actual_range 16, 145;
    String long_name "Arg";
    String units "nanomoles per liter (nmol L-1)";
  }
  Tyr {
    Int32 actual_range 8, 68;
    String long_name "Tyr";
    String units "nanomoles per liter (nmol L-1)";
  }
  Val {
    Int32 actual_range 22, 202;
    String long_name "Val";
    String units "nanomoles per liter (nmol L-1)";
  }
  Ileu {
    Int32 actual_range 8, 57;
    String long_name "Ileu";
    String units "nanomoles per liter (nmol L-1)";
  }
  Phe {
    Int32 actual_range 0, 101;
    String long_name "Phe";
    String units "nanomoles per liter (nmol L-1)";
  }
  Leu {
    Int32 actual_range 11, 236;
    String long_name "Leu";
    String units "nanomoles per liter (nmol L-1)";
  }
  Lys {
    Int32 actual_range 17, 168;
    String long_name "Lys";
    String units "nanomoles per liter (nmol L-1)";
  }
  Ala {
    Int32 actual_range 85, 479;
    String long_name "Ala";
    String units "nanomoles per liter (nmol L-1)";
  }
  Ser {
    Int32 actual_range 69, 265;
    String long_name "Ser";
    String units "nanomoles per liter (nmol L-1)";
  }
  Glx {
    Int32 actual_range 56, 417;
    String long_name "Glx";
    String units "nanomoles per liter (nmol L-1)";
  }
  Asx {
    Int32 actual_range 88, 484;
    String long_name "Asx";
    String units "nanomoles per liter (nmol L-1)";
  }
  DAA {
    Int32 actual_range 41, 140;
    String long_name "Daa";
    String units "nanomoles per liter (nmol L-1)";
  }
  THAA {
    Int32 actual_range 619, 3605;
    String long_name "Thaa";
    String units "nanomoles per liter (nmol L-1)";
  }
 }
  NC_GLOBAL {
    String cdm_data_type "Other";
    String Conventions "COARDS, CF-1.6, ACDD-1.3";
    String creator_email "info@bco-dmo.org";
    String creator_name "BCO-DMO";
    String creator_url "https://www.bco-dmo.org/";
    String doi "10.26008/1912/bco-dmo.982177.1";
    Float64 Easternmost_Easting -94.6886;
    Float64 geospatial_lat_max 29.6725;
    Float64 geospatial_lat_min 29.33278;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max -94.6886;
    Float64 geospatial_lon_min -94.9789;
    String geospatial_lon_units "degrees_east";
    String history 
"2026-09-10T16:54:41Z (local files)
2026-09-10T16:54:41Z https://erddap.bco-dmo.org/tabledap/bcodmo_dataset_982177_v1.das";
    String infoUrl "https://osprey.bco-dmo.org/dataset/982177";
    String institution "BCO-DMO";
    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 29.6725;
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing 29.33278;
    String summary "This dataset contains biochemical data on dissolved organic matter composition collected on five consecutive one-day trips aboard R/V Trident along a transect from the Port of Houston to the Galveston Bay entrance following Hurricane Harvey from September 4 to September 28, 2017.";
    String title "[Coastal DOM Galveston Bay] - Biochemical data on dissolved organic matter composition from Galveston Bay collected on five one-day trips aboard R/V Trident following Hurricane Harvey from September 4 to 28, 2017 (Collaborative Research: Distribution and Cycling of Carboxyl-Rich Alicyclic Molecules (CRAM) in the Ocean)";
    Float64 Westernmost_Easting -94.9789;
  }
}

Using tabledap to Request Data and Graphs from Tabular Datasets

tabledap lets you request a data subset, a graph, or a map from a tabular dataset (for example, buoy data), via a specially formed URL. tabledap uses the OPeNDAP (external link)

Data Access Protocol (DAP) (external link)

and its selection 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 or Subset form. They make 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.

Tabledap request URLs must be in the form
https://coastwatch.pfeg.noaa.gov/erddap/tabledap/datasetID.fileType{?query}
For example,
https://coastwatch.pfeg.noaa.gov/erddap/tabledap/pmelTaoDySst.htmlTable?longitude,latitude,time,station,wmo_platform_code,T_25&time>=2015-05-23T12:00:00Z&time<=2015-05-31T12:00:00Z
Thus, the query is often a comma-separated list of desired variable names, followed by a collection of constraints (e.g., variable<value), each preceded by '&' (which is interpreted as "AND").

For details, see the tabledap Documentation.

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