BCO-DMO ERDDAP
Accessing BCO-DMO data

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Dataset Title:	[pH internal Consistency Experiment: Raw pH Data] - Raw pH data acquired during the pH internal consistency experiment. (Improving Accuracy and Precision of Marine Inorganic Carbon Measurements)
Institution:	BCO-DMO (Dataset ID: bcodmo_dataset_905235_v1)
Information:	Summary \| License \| Metadata \| Background \| Data Access Form \| Files

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Constraints	Optional Constraint #1		Optional Constraint #2

Server-side Functions

distinct()

Hover here to see a list of options. Click on an option to select it.

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(Please be patient. It may take a while to get the data.)

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[The graph you specified. Please be patient.]

Things You Can Do With Your Graphs

Well, you can do anything you want with your graphs, of course. But some things you might not have considered are:

Web page authors can embed a graph of the latest data in a web page using HTML <img> tags.
Anyone can use ERDDAPs Slide Sorter to build a personal web page that displays graphs with the latest data (or other images or HTML content), each in its own, draggable slide.

The Dataset Attribute Structure (.das) for this Dataset

Attributes {
 s {
  Batch {
    String long_name "Batch";
    String units "unitless";
  }
  Bottle {
    Int32 actual_range 1, 44;
    String long_name "Bottle";
    String units "unitless";
  }
  Rep {
    String long_name "Rep";
    String units "unitless";
  }
  Practical_Salinity {
    Float32 actual_range 14.618, 38.885;
    String long_name "Practical_salinity";
    String units "unitless";
  }
  Calculated_Temperature {
    Float32 actual_range -1.906, 40.075;
    String long_name "Calculated_temperature";
    String units "Degrees Celsius (˚C)";
  }
  Measured_Temperature {
    Float32 actual_range -1.925, 40.092;
    String long_name "Measured_temperature";
    String units "Degrees Celsius (˚C)";
  }
  A434 {
    Float32 actual_range -0.731606, 1.429179;
    String long_name "A434";
    String units "Absorbance units (AU)";
  }
  A578 {
    Float32 actual_range -0.473405, 1.475319;
    String long_name "A578";
    String units "Absorbance units (AU)";
  }
  A730 {
    Float32 actual_range -1.502294, 0.17917;
    String long_name "A730";
    String units "Absorbance units (AU)";
  }
  A488 {
    Float32 actual_range -0.916205, 0.955286;
    String long_name "A488";
    String units "Absorbance units (AU)";
  }
  R {
    Float32 actual_range 0.433921, 3.944496;
    String long_name "R";
    String units "Absorbance units (AU)";
  }
  raw_pHt {
    Float32 actual_range 7.2185, 8.7034;
    String long_name "Raw_pht";
    String units "unitless";
  }
  flag {
    Int32 actual_range 2, 9;
    String long_name "Flag";
    String units "unitless";
  }
  flag_reason {
    String long_name "Flag_reason";
    String units "unitless";
  }
 }
  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.905235.1";
    String history 
"2024-09-21T23:16:38Z (local files)
2024-09-21T23:16:38Z https://erddap.bco-dmo.org/tabledap/bcodmo_dataset_905235_v1.das";
    String infoUrl "https://www.bco-dmo.org/dataset/905235";
    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.";
    String sourceUrl "(local files)";
    String summary 
"These data include the measured pHt, total alkalinity, dissolved inorganic carbon, raw pHt absorbance, and calculated pHt of 25 batches of seawater as a function of temperature, salinity, and pCO2. These data were used to evaluate the internal consistency of 120 different possible combinations of CO2 system constants.

The marine inorganic carbon system can be calculated with two measured parameters due to thermodynamic relationships. However, there are many different parameterizations for the required constants and the most accurate or best is not known. These data were used to evaluate the constants and make recommendations for which constants to use, and how to perform CO2 system calculations.";
    String title "[pH internal Consistency Experiment: Raw pH Data] - Raw pH data acquired during the pH internal consistency experiment. (Improving Accuracy and Precision of Marine Inorganic Carbon Measurements)";
  }
}

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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