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Dataset Title:  [Bivalve Boron Isotopes] - Boron isotope data from bivalves from 2022 tank
experiment in the Gulf of Maine, USA (Collaborative Research: Using multi-proxy
paleo data to constrain natural and anthropogenic hydrographic variability in
the Gulf of Maine System over the last 250 years) Subscribe RSS
Institution:  BCO-DMO   (Dataset ID: bcodmo_dataset_995690_v1)
Information:  Summary ? | License ? | Metadata | Background (external link) | 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:

The Dataset Attribute Structure (.das) for this Dataset

Attributes {
 s {
  SampleID {
    String long_name "Sampleid";
    String units "unitless";
  }
  Sample_species {
    String long_name "Sample_species";
    String units "unitless";
  }
  Sample_description {
    String long_name "Sample_description";
    String units "unitless";
  }
  Average_temperature {
    Float32 actual_range 6.0, 12.2;
    String long_name "Average_temperature";
    String units "degrees Celsius";
  }
  Average_pHT {
    Float32 actual_range 7.39, 8.05;
    String long_name "Average_pht";
    String units "pH units";
  }
  Average_salinity {
    Float32 actual_range 31.96, 32.146;
    String long_name "Average_salinity";
    String units "psu";
  }
  boron_isotope_value_borate_ion {
    Float32 actual_range 12.99, 15.83;
    String long_name "Boron_isotope_value_borate_ion";
    String units "per mil (‰, water)";
  }
  boron_isotope_value_shell {
    Float32 actual_range 2.5, 19.25;
    String long_name "Boron_isotope_value_shell";
    String units "per mil (‰)";
  }
  boron_calcium_ratio {
    Int32 actual_range 16, 105;
    String long_name "Boron_calcium_ratio";
    String units "(umol/mol)";
  }
  delta_pH {
    Float32 actual_range -2.279, 0.524;
    String long_name "Delta_ph";
    String units "pH units";
  }
 }
  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.995690.1";
    String history 
"2026-04-24T16:56:07Z (local files)
2026-04-24T16:56:07Z https://erddap.bco-dmo.org/tabledap/bcodmo_dataset_995690_v1.das";
    String infoUrl "https://osprey.bco-dmo.org/dataset/995690";
    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 boron isotopic composition (δ11Bc) of many marine carbonates provides insight into the pH at the site of calcification within biocalcifiers and, by extension, the pH of ambient seawater when the carbonate formed.

A 20.5-week flowthrough tank experiment was conducted in which four species of commercially important bivalves from the northwest Atlantic Ocean were grown in tanks with controlled pHT (pH 7.4 to 8.0) and temperature conditions (6 to 12 °C). A total of 106 shell samples from 99 individuals of adult and juvenile Arctica islandica (ocean quahog), juvenile Mercenaria mercenaria (northern quahog or hard clam), juvenile Mya arenaria (soft-shell clam), and juvenile Placopecten magellanicus (Atlantic sea scallop) were analyzed from this controlled experiment to assess the seawater pH, temperature, and growth rate controls on shell δ11Bc. Juvenile P. magellanicus and juvenile M. mercenaria demonstrated significant relationships (R≥0.60; p-value <0.006) between tank pHT and δ11Bc, suggesting potential utility as proxies for past ambient seawater pH. Conversely, the δ11Bc of juvenile A. islandica and juvenile M. arenaria did not yield a strong relationship with seawater pHT but instead yielded significant relationships with shell growth rate (linear extension), with a positive relationship for M. arenaria and a negative relationship for juvenile A. islandica. The δ11B results from the few (n=9) adult A. islandica shells measured show the most variability across the range of pH and temperatures (range of 16‰), and no significant relationship was found with seawater pH or growth rate. Despite rigorous oxidative cleaning of samples, the data suggest that adult A. islandica shells contain boron-rich organic phases resistant to traditional cleaning techniques.

The data on this site (summary file) include the average temperature, pH, and salinity used for the boron isotope analysis, in addition to the δ11B of the borate in water calculations, δ11B measured in the shells, the B/Ca ratio measured in the shells, and the delta pH values calculated using the above values.

Additional data include (temperature file) all temperature measurements from the tank experiment (every minute measurements) and daily averages. pH (pH file) and salinity (salinity file) data from weekly measurements are included. Data needed to perform the delta pH calculations are included (delta pH file).

The specimens grown in each tank that were used for boron isotope measurements are also included (boron specimens by tank file). This file specifies the number and species that were grown under the various tank conditions.";
    String title "[Bivalve Boron Isotopes] - Boron isotope data from bivalves from 2022 tank experiment in the Gulf of Maine, USA (Collaborative Research: Using multi-proxy paleo data to constrain natural and anthropogenic hydrographic variability in the Gulf of Maine System over the last 250 years)";
  }
}

 

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.

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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