Data Access Form

Dataset Title:	[CenBASE ³He and SF₆ data] - (Dual gas tracer measurements during the Central Baltic Sea Air-Sea Exchange Experiment (CenBASE))
Institution:	BCO-DMO (Dataset ID: bcodmo_dataset_988658_v1)
Information:	Summary \| License \| FGDC \| ISO 19115 \| Metadata \| Background \| Files \| Make a graph

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Variable	Minimum	Maximum
time (Iso_datetime_utc, UTC)	2022-07-08T19:20:59Z	2022-07-13T13:58:18Z

latitude (degrees_north)	57.3355	57.446

longitude (degrees_east)	19.5272	20.086

depth (Depth_m, m)	2.1	19.6

temperature_C (degrees Celsius (°C))	9.64	19.3
salinity (PSU)	7.28	7.46
He3_excess (cubic centimeters at standard temperature and pressure per gram times 10^-16 (ccSTP/g*10-16))	-23.6	13800.0
SF6_pmol_kg (picomoles per kilogram (pmol/kg))	77.7	5940.0

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The Dataset Attribute Structure (.das) for this Dataset

Attributes {
 s {
  time {
    String _CoordinateAxisType "Time";
    Float64 actual_range 1.657308059e+9, 1.657720698e+9;
    String axis "T";
    String ioos_category "Time";
    String long_name "Iso_datetime_utc";
    String standard_name "time";
    String time_origin "01-JAN-1970 00:00:00";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  latitude {
    String _CoordinateAxisType "Lat";
    Float32 actual_range 57.3355, 57.446;
    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 19.5272, 20.086;
    String axis "X";
    String ioos_category "Location";
    String long_name "Longitude";
    String standard_name "longitude";
    String units "degrees_east";
  }
  depth {
    String _CoordinateAxisType "Height";
    String _CoordinateZisPositive "down";
    Float32 actual_range 2.1, 19.6;
    String axis "Z";
    String ioos_category "Location";
    String long_name "Depth_m";
    String positive "down";
    String standard_name "depth";
    String units "m";
  }
  temperature_C {
    Float32 actual_range 9.64, 19.3;
    String long_name "Temperature_c";
    String units "degrees Celsius (°C)";
  }
  salinity {
    Float32 actual_range 7.28, 7.46;
    String long_name "Salinity";
    String units "PSU";
  }
  He3_excess {
    Float32 actual_range -23.6, 13800.0;
    String long_name "He3_excess";
    String units "cubic centimeters at standard temperature and pressure per gram times 10^-16 (ccSTP/g*10-16)";
  }
  SF6_pmol_kg {
    Float32 actual_range 77.7, 5940.0;
    String long_name "Sf6_pmol_kg";
    String units "picomoles per kilogram (pmol/kg)";
  }
 }
  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 defaultDataQuery "&amp;time&lt;now";
    String doi "10.26008/1912/bco-dmo.988658.1";
    Float64 Easternmost_Easting 20.086;
    Float64 geospatial_lat_max 57.446;
    Float64 geospatial_lat_min 57.3355;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max 20.086;
    Float64 geospatial_lon_min 19.5272;
    String geospatial_lon_units "degrees_east";
    Float64 geospatial_vertical_max 19.6;
    Float64 geospatial_vertical_min 2.1;
    String geospatial_vertical_positive "down";
    String geospatial_vertical_units "m";
    String history 
"2026-02-13T13:53:01Z (local files)
2026-02-13T13:53:01Z https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_988658_v1.html";
    String infoUrl "https://osprey.bco-dmo.org/dataset/988658";
    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 57.446;
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing 57.3355;
    String summary "This dataset contains measurements of helium-3 (3He) and sulfur hexafluoride (SF6) concentrations obtained from a tracer release experiment conducted in the central Baltic Sea aboard research cruise EMB295 on the R/V Elisabeth Mann Borgese from June 30th to July 19th, 2022. SF6 concentrations were measured onboard using a gas chromatograph equipped with an electron capture detector (GC-ECD), following gas separation via a purge-and-trap SF6 analysis system. 3He concentrations were determined at the laboratory at the Institute of Environmental Physics at the University of Bremen, using a helium isotope mass spectrometer (MAP 215-50).";
    String time_coverage_end "2022-07-13T13:58:18Z";
    String time_coverage_start "2022-07-08T19:20:59Z";
    String title "[CenBASE ³He and SF₆ data] -  (Dual gas tracer measurements during the Central Baltic Sea Air-Sea Exchange Experiment (CenBASE))";
    Float64 Westernmost_Easting 19.5272;
  }
}

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.