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Dataset Title:  [Baltic GasEx (2018) Helium isotopes and Neon] - Helium isotope and neon data
from seawater samples collected June 2018 during FS Alkor cruise AL510 in the
Baltic Sea (Collaborative Research: Influence of Surfactants on Air-Sea Gas
Exchange: 3He/SF6 Experiments in the Baltic Sea) Subscribe RSS
Institution:  BCO-DMO   (Dataset ID: bcodmo_dataset_915490_v1)
Range: longitude = 10.07236 to 10.20465°E, depth = 0.7 to 22.3m, time = 2018-06-04T11:28:39Z to 2018-06-15T04:01:09Z
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 {
  St_ID {
    Int32 actual_range 27, 77;
    String long_name "St_id";
    String units "unitless";
  }
  Sa_ID_LDEO {
    Int32 actual_range 3030149, 3030554;
    String long_name "Sa_id_ldeo";
    String units "unitless";
  }
  Sample_label {
    String long_name "Sample_label";
    String units "unitless";
  }
  Sa_ID {
    Int32 actual_range 2700001, 7700011;
    String long_name "Sa_id";
    String units "unitless";
  }
  time {
    String _CoordinateAxisType "Time";
    Float64 actual_range 1.528111719e+9, 1.529035269e+9;
    String axis "T";
    String ioos_category "Time";
    String long_name "Sample_datetime_utc";
    String standard_name "time";
    String time_origin "01-JAN-1970 00:00:00";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  Lat {
    Float32 actual_range 54.52031, 54.70752;
    String long_name "Lat";
    String units "degrees_north";
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float32 actual_range 10.07236, 10.20465;
    String axis "X";
    String ioos_category "Location";
    String long_name "Longitude";
    String standard_name "longitude";
    String units "degrees_east";
  }
  Bottom_depth {
    Float32 actual_range 11.5, 25.0;
    String long_name "Bottom_depth";
    String units "meters (m)";
  }
  Niskin {
    Int32 actual_range 1, 12;
    String long_name "Niskin";
    String units "unitless";
  }
  Depth_uncorr {
    Float32 actual_range 1.0, 23.0;
    String long_name "Depth_uncorr";
    String units "m";
  }
  depth {
    String _CoordinateAxisType "Height";
    String _CoordinateZisPositive "down";
    Float32 actual_range 0.7, 22.3;
    String axis "Z";
    String ioos_category "Location";
    String long_name "Depth";
    String positive "down";
    String standard_name "depth";
    String units "m";
  }
  Temp {
    Float32 actual_range 6.006, 20.111;
    String long_name "Temp";
    String units "degrees Celsius (°C)";
  }
  Sal {
    Float32 actual_range 11.073, 18.682;
    String long_name "Sal";
    String units "PSU";
  }
  Dens_pot {
    Float32 actual_range 1006.579, 1014.687;
    String long_name "Dens_pot";
    String units "kilogram per cubic meter (kg/m3)";
  }
  d3He {
    Float32 actual_range -10.73, 3056.43;
    String long_name "D3he";
    String units "percent (%)";
  }
  d3HeEr {
    Float32 actual_range 0.1, 30.0;
    String long_name "D3heer";
    String units "percent (%)";
  }
  d3HeFlag {
    Int32 actual_range 2, 4;
    String long_name "D3heflag";
    String units "unitless";
  }
  He4Conc {
    Float32 actual_range 2.86e-8, 1.49e-7;
    String long_name "He4conc";
    String units "cubic centimeters at standard temperature and pressure per gram (ccSTP/g)";
  }
  He4ConcEr {
    Float32 actual_range 4.7e-12, 7.3e-11;
    String long_name "He4concer";
    String units "cubic centimeters at standard temperature and pressure per gram (ccSTP/g)";
  }
  He4Flag {
    Int32 actual_range 2, 4;
    String long_name "He4flag";
    String units "unitless";
  }
  He3Conc {
    Float32 actual_range 3.84e-14, 1.9e-12;
    String long_name "He3conc";
    String units "cubic centimeters at standard temperature and pressure per gram (ccSTP/g)";
  }
  He3ConcEr {
    Float32 actual_range 6.4e-17, 1.61e-13;
    String long_name "He3concer";
    String units "cubic centimeters at standard temperature and pressure per gram (ccSTP/g)";
  }
  He3He4Ratio {
    Float32 actual_range 1.24e-6, 4.37e-5;
    String long_name "He3he4ratio";
    String units "unitless";
  }
  He3He4Er {
    Float32 actual_range 1.38e-9, 3.74e-6;
    String long_name "He3he4er";
    String units "cubic centimeters at standard temperature and pressure per gram (ccSTP/g)";
  }
  He4 {
    Float32 actual_range 114.91, 595.54;
    String long_name "He4";
    String units "grams";
  }
  He4ErRelpercent {
    Float32 actual_range 0.01, 0.15;
    String long_name "He4errelpercent";
    String units "percent (%)";
  }
  NeConc {
    Float32 actual_range 0.0, 5.21e-7;
    String long_name "Neconc";
    String units "cubic centimeters at standard temperature and pressure per gram (ccSTP/g)";
  }
  NeConcEr {
    Float32 actual_range 0.0, 1.7e-8;
    String long_name "Neconcer";
    String units "cubic centimeters at standard temperature and pressure per gram (ccSTP/g)";
  }
  NeFlag {
    Int32 actual_range 2, 4;
    String long_name "Neflag";
    String units "unitless";
  }
  MeasureDate {
    String long_name "Measuredate";
    String units "unitless";
  }
  Comment {
    String long_name "Comment";
    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.915490.1";
    Float64 Easternmost_Easting 10.20465;
    Float64 geospatial_lon_max 10.20465;
    Float64 geospatial_lon_min 10.07236;
    String geospatial_lon_units "degrees_east";
    Float64 geospatial_vertical_max 22.3;
    Float64 geospatial_vertical_min 0.7;
    String geospatial_vertical_positive "down";
    String geospatial_vertical_units "m";
    String history 
"2024-09-21T19:53:03Z (local files)
2024-09-21T19:53:03Z https://erddap.bco-dmo.org/tabledap/bcodmo_dataset_915490_v1.das";
    String infoUrl "https://www.bco-dmo.org/dataset/915490";
    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 "This dataset encompasses 145 seawater samples collected from 23 hydrographic stations during the AL510 cruise in the Baltic Sea aboard the research vessel Alkor, from June 6 to June 11, 2018. Helium isotopes and neon measurements were conducted in the Noble Gas Laboratory of the Lamont-Doherty Earth Observatory on a dedicated, fully automated VG5400 mass spectrometer following the procedures described by Ludin et al. (1998). Helium and neon samples were collected from Niskin bottles in copper tubes (40 ml) sealed by stainless steel pinch-off clamps. Shipboard sampling, gas extraction, and isotopic analysis were done by Tobias (Toby) Koffman with data processing by Peter Schlosser.";
    String time_coverage_end "2018-06-15T04:01:09Z";
    String time_coverage_start "2018-06-04T11:28:39Z";
    String title "[Baltic GasEx (2018) Helium isotopes and Neon] - Helium isotope and neon data from seawater samples collected June 2018 during FS Alkor cruise AL510 in the Baltic Sea (Collaborative Research: Influence of Surfactants on Air-Sea Gas Exchange: 3He/SF6 Experiments in the Baltic Sea)";
    Float64 Westernmost_Easting 10.07236;
  }
}

 

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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