BCO-DMO ERDDAP
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Dataset Title:	[Boric acid dissociation constants in freshwater and marine conditions] - Boric acid dissociation constants (pKB) from spectrophotometrically calibrated electrode measurements made in natural seawater across estuarine to open-ocean conditions (Spectrophotometric Determinations of Carbonic Acid Dissociation Constants for Estuarine Conditions)
Institution:	BCO-DMO (Dataset ID: bcodmo_dataset_1000973_v1)
Information:	Summary \| License \| Metadata \| Background \| Data Access Form \| Files

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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 {
  source {
    String long_name "Source";
    String units "unitless";
  }
  Target_t_C {
    Int32 actual_range 0, 45;
    String long_name "Target_t_c";
    String units "degrees Celsius (°C)";
  }
  Target_T_K {
    Float32 actual_range 273.15, 318.15;
    String long_name "Target_t_k";
    String units "Kelvin (K)";
  }
  Target_Sal {
    Float32 actual_range 0.0, 45.0;
    String long_name "Target_sal";
    String units "PSS-78";
  }
  Temp_C {
    Float32 actual_range 0.0, 45.0;
    String long_name "Temp_c";
    String units "degrees Celsius (°C)";
  }
  Temp_K {
    Float32 actual_range 273.15, 318.15;
    String long_name "Temp_k";
    String units "Kelvin (K)";
  }
  Sal {
    Float32 actual_range 0.0, 45.865;
    String long_name "Sal";
    String units "PSS-78";
  }
  exp_pKB_combined {
    Float32 actual_range 8.3151, 9.4763;
    String long_name "Exp_pkb_combined";
    String units "unitless";
  }
  borax_added_mg {
    Float32 actual_range 76.5, 139.1;
    String long_name "Borax_added_mg";
    String units "milligrams (mg)";
  }
  sw_origin {
    String long_name "Sw_origin";
    String units "unitless";
  }
  sw_collection_year {
    String long_name "Sw_collection_year";
    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.1000973.1";
    String history 
"2026-06-26T23:43:07Z (local files)
2026-06-26T23:43:07Z https://erddap.bco-dmo.org/tabledap/bcodmo_dataset_1000973_v1.das";
    String infoUrl "https://osprey.bco-dmo.org/dataset/1000973";
    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 "The dissociation constant of boric acid (KB) plays a critical role in marine carbonate system calculations, yet available parameterizations remain limited in salinity coverage and have not been revisited using modern methodology. This dataset combines Dickson (1990)'s data (i.e., D90) in synthetic seawater with our own work (i.e., MMB26) to produce an improved parameterization of pKB for carbonate system calculations across a full range of estuarine and open-ocean environments. MMB26 is a novel dataset of pKB obtained in natural seawater, derived from spectrophotometrically calibrated electrode measurements spanning salinities from 0 to 45.9 and temperatures between 275.15 and 308.15 K. This experimental data is particularly important given that nearly half the total variation in pKB across the full salinity range occurs within the narrow freshwater-to-brackish transition. The spectrophotometrically calibrated electrode data (MMB26) are in excellent agreement with previous work obtained in synthetic seawater at salinities greater than 5 (D90).";
    String title "[Boric acid dissociation constants in freshwater and marine conditions] - Boric acid dissociation constants (pKB) from spectrophotometrically calibrated electrode measurements made in natural seawater across estuarine to open-ocean conditions (Spectrophotometric Determinations of Carbonic Acid Dissociation Constants for Estuarine Conditions)";
  }
}

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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