BCO-DMO ERDDAP
Accessing BCO-DMO data

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Dataset Title:	[EPR 9-10 North Electron Microprobe Wavelength Spectroscopy] - Electron microprobe wavelength dispersive spectroscopy from seafloor sulfide deposits East Pacific Rise 9-10 North from R/V Atlantis, R/V Roger Revelle AT42-09, AT42- 21, RR2102 from October 2020 (Hot2cold Vents project) (Collaborative Research: From hot to cold in the dark - shifts in seafloor massive sulfide microbial communities as physical and geochemical conditions change after venting ceases)
Institution:	BCO-DMO (Dataset ID: bcodmo_dataset_988651_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 {
  name {
    String long_name "Name";
    String units "unitless";
  }
  ISO_DateTime_UTC {
    String long_name "Iso_datetime_utc";
    String units "unitless";
  }
  comment {
    String long_name "Comment";
    String units "unitless";
  }
  stage_x {
    Float32 actual_range -22.5468, 25.3565;
    String long_name "Stage_x";
    String units "micrometer (um)";
  }
  stage_y {
    Float32 actual_range -11.1828, 23.8919;
    String long_name "Stage_y";
    String units "micrometer (um)";
  }
  stage_z {
    Float32 actual_range 10.468, 10.6945;
    String long_name "Stage_z";
    String units "micrometer (um)";
  }
  Acc_Voltage_kV {
    Int32 actual_range 20, 20;
    String long_name "Acc_voltage_kv";
    String units "kilovolt (kV)";
  }
  Probe_Dia_um {
    Int32 actual_range 5, 5;
    String long_name "Probe_dia_um";
    String units "micrometer (um)";
  }
  Scan {
    String long_name "Scan";
    String units "unitless";
  }
  Mag {
    Int32 actual_range 1000, 1000;
    String long_name "Mag";
    String units "unknown";
  }
  Curr_A {
    Float32 actual_range 4.0e-8, 4.0e-8;
    String long_name "Curr_a";
    String units "amperage (A)";
  }
  Element {
    String long_name "Element";
    String units "unitless";
  }
  Crystal {
    String long_name "Crystal";
    String units "unitless";
  }
  Peak_mm {
    Float32 actual_range 77.25, 197.15;
    String long_name "Peak_mm";
    String units "millimeter (mm)";
  }
  BG_lower_wavelength_mm {
    Float32 actual_range 0.1, 4.15;
    String long_name "Bg_lower_wavelength_mm";
    String units "millimeter (mm)";
  }
  BG_higher_wavelength_mm {
    Float32 actual_range 0.6, 4.4;
    String long_name "Bg_higher_wavelength_mm";
    String units "millimeter (mm)";
  }
  Net_cps {
    Float32 actual_range 4.8, 48175.2;
    String long_name "Net_cps";
    String units "counts per second";
  }
  Bg_lower_wavelength_cps {
    Float32 actual_range 4.9, 455.3;
    String long_name "Bg_lower_wavelength_cps";
    String units "counts per second";
  }
  Bg_higher_wavelength_cps {
    Float32 actual_range 6.5, 274.0;
    String long_name "Bg_higher_wavelength_cps";
    String units "counts per second";
  }
  ZAF_type {
    String long_name "Zaf_type";
    String units "unitless";
  }
  K_raw_percent {
    Float32 actual_range 0.002, 32.062;
    String long_name "K_raw_percent";
    String units "percent (%)";
  }
  Mass_percent {
    Float32 actual_range 0.008, 98.652;
    String long_name "Mass_percent";
    String units "percent (%)";
  }
  Atom_percent {
    Float32 actual_range 0.0043, 97.3768;
    String long_name "Atom_percent";
    String units "percent (%)";
  }
  Cation_percent {
    Float32 actual_range 0.005, 16.402;
    String long_name "Cation_percent";
    String units "percent (%)";
  }
  K_percent {
    Float32 actual_range 0.002, 32.062;
    String long_name "K_percent";
    String units "percent (%)";
  }
  ZAF {
    Float32 actual_range 0.9868, 4.2596;
    String long_name "Zaf";
    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.988651.1";
    String history 
"2026-06-14T01:57:39Z (local files)
2026-06-14T01:57:39Z https://erddap.bco-dmo.org/tabledap/bcodmo_dataset_988651_v1.das";
    String infoUrl "https://osprey.bco-dmo.org/dataset/988651";
    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 
"Electron microprobe wavelength dispersive spectroscopy (WDS) data were collected for seafloor sulfide deposits. Seafloor sulfide mineral samples were collected from hydrothermally active chimneys and inactive off-axis massive sulfide deposits at East Pacific Rise (EPR) 9.50°N during 2019–2021 on cruises AT42-09, AT42-21, and RR2102. Samples were collected using the HOV Alvin or ROV Jason II. Samples were placed in a positive-pressure glove bag flushed with N₂(g), sparged with N₂, heat-sealed into Mylar bags containing AnaeroPaks, and stored at −20 °C.

Epoxy-embedded petrographic thin sections were prepared from these samples. Subsamples were dried for 24 hours under N₂(g), vacuum-embedded in epoxy resin (Struers EpoFix Resin, 1 L kit; Part #40200030) following the manufacturer's guidelines, and cured under N₂(g) for 24 hours. Each epoxy-embedded sample was pre-cut using a wafering saw and then sent to Spectrum Petrographics, Inc. (Washington, USA) for preparation as 30 µm thick, double-polished thin sections mounted on quartz slides, using methods designed to limit sample exposure to water and ambient air. When not in use, thin sections were stored under N₂(g) to limit oxidation. Thin sections were analyzed by electron microprobe WDS using a JEOL JXA-8530FPlus Electron Probe Microanalyzer at the Electron Microprobe Laboratory, Earth and Environmental Sciences, Twin Cities, University of Minnesota.";
    String title "[EPR 9-10 North Electron Microprobe Wavelength Spectroscopy] - Electron microprobe wavelength dispersive spectroscopy from seafloor sulfide deposits East Pacific Rise 9-10 North from R/V Atlantis, R/V Roger Revelle AT42-09, AT42-21, RR2102 from October 2020 (Hot2cold Vents project) (Collaborative Research: From hot to cold in the dark - shifts in seafloor massive sulfide microbial communities as physical and geochemical conditions change after venting ceases)";
  }
}

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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