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Dataset Title:  Dissolved seawater chromium (Cr) concentrations and stable isotope
compositions measured on samples collected with a trace metal clean rosette
system in the Southern Ocean
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Institution:  ETH Zurich, Switzerland   (Dataset ID: ZENODO_3250980)
Information:  Summary ? | License ? | FGDC | ISO 19115 | Metadata | Background (external link) | Files | Make a graph
 
Variable ?   Optional
Constraint #1 ?
Optional
Constraint #2 ?
   Minimum ?
 
   Maximum ?
 
 time (UTC) ?          2017-01-17T07:23:53Z    2017-02-19T03:05:55Z
  < slider >
 latitude (degrees_north) ?          -67.29    -46.393
  < slider >
 longitude (degrees_east) ?          -67.919    167.36
  < slider >
 trace_metal_rosette_cast_number ?          7    20
 ace_event_number ?          613    1903
 ace_sample_number ?          "AT/ACE/1/15/017/61..."    "AT/ACE/2/15/050/19..."
 depth (m) ?          15    1000
  < slider >
 chromium_concentration ?          3.21947    3.95325
 d53Cr ?          0.87032    1.06464
 internal_error ?          0.0155    0.03
 
Server-side Functions ?
 distinct() ?
? ("Hover here to see a list of options. Click on an option to select it.Hover here to see a list of options. Click on an option to select it.Hover here to see a list of options. Click on an option to select it.Hover here to see a list of options. Click on an option to select it.Hover here to see a list of options. Click on an option to select it.")

File type: (more info)

(Documentation / Bypass this form ? )
 
(Please be patient. It may take a while to get the data.)


 

The Dataset Attribute Structure (.das) for this Dataset

Attributes {
 s {
  time {
    String _CoordinateAxisType "Time";
    Float64 actual_range 1.484637833e+9, 1.487473555e+9;
    String axis "T";
    String ioos_category "Time";
    String long_name "Time";
    String source_name "date_time";
    String standard_name "time";
    String time_origin "01-JAN-1970 00:00:00";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  latitude {
    Int32 _ChunkSizes 512;
    String _CoordinateAxisType "Lat";
    Float64 actual_range -67.29, -46.393;
    String attribute "Latitude at which trace metal rosette deployment began";
    String axis "Y";
    Float64 colorBarMaximum 90.0;
    Float64 colorBarMinimum -90.0;
    String description "Latitude at which the trace metal rosette deployment began";
    String ioos_category "Location";
    String long_name "Latitude";
    String spi_original_name "latitude [degN]";
    String standard_name "latitude";
    String unit "degree_north";
    String units "degrees_north";
  }
  longitude {
    Int32 _ChunkSizes 512;
    String _CoordinateAxisType "Lon";
    Float64 actual_range -67.919, 167.36;
    String attribute "Longitude at which trace metal rosette deployment began";
    String axis "X";
    Float64 colorBarMaximum 180.0;
    Float64 colorBarMinimum -180.0;
    String description "Longitude at which the trace metal rosette deployment began";
    String ioos_category "Location";
    String long_name "Longitude";
    String spi_original_name "longitude [degE]";
    String standard_name "longitude";
    String unit "degree_east";
    String units "degrees_east";
  }
  trace_metal_rosette_cast_number {
    Int32 _ChunkSizes 1024;
    Int32 actual_range 7, 20;
    String description "Unique identification number of each trace metal rosette cast during the Antarctic Circumnavigation Expedition";
    String spi_original_name "trace_metal_rosette_cast_number";
  }
  ace_event_number {
    Int32 _ChunkSizes 1024;
    Int32 actual_range 613, 1903;
    String description "Unique identification number of the trace metal rosette deployment within the Antarctic Circumnavigation Expedition project";
    String spi_original_name "ace_event_number";
  }
  ace_sample_number {
    Int32 _ChunkSizes 1, 38;
    String description "Unique number of the seawater sample within the ACE project in the format shipname/ACE/legnumber/projectnumber/julianday[UTC]/eventnumber/PIinitials/projectsamplenumber";
    String spi_original_name "ace_sample_number";
  }
  depth {
    Int32 _ChunkSizes 1024;
    String _CoordinateAxisType "Height";
    String _CoordinateZisPositive "down";
    Int32 actual_range 15, 1000;
    String attribute "Depth below the surface from which the seawater sample was taken";
    String axis "Z";
    String description "Depth below the surface from which the seawater sample was taken";
    String ioos_category "Location";
    String long_name "Depth";
    String positive "down";
    String spi_original_name "depth [m]";
    String standard_name "depth";
    String unit "m";
    String units "m";
  }
  chromium_concentration {
    Int32 _ChunkSizes 512;
    Float64 actual_range 3.21947, 3.95325;
    String description "Concentration of chromium (VI and III) measured in the seawater sample, based on a double-spike method";
    String spi_original_name "chromium_concentration [nmol/kg]";
    String unit "nmol kg-1";
  }
  d53Cr {
    Int32 _ChunkSizes 512;
    Float64 actual_range 0.87032, 1.06464;
    String description "Seawater stable chromium isotope composition (Cr VI and III) expressed in delta-notation relative to NIST SRM 979. Based on a double-spike method";
    String spi_original_name "d53Cr [‰]";
    String unit "‰";
  }
  internal_error {
    Int32 _ChunkSizes 512;
    Float64 actual_range 0.0155, 0.03;
    String description "In run error on d53Cr (2 standard error of the mean)";
    String spi_original_name "internal_error [‰]";
    String unit "‰";
  }
 }
  NC_GLOBAL {
    String cdm_data_type "Other";
    String citation "Rickli, Jörg, Janssen, David J., Hassler, Christel, Ellwood, Michael, & Jaccard, Samuel L. (2019). Seawater chromium concentrations and isotope compositions in the Southern Ocean during the austral summer of 2016/2017, on board the Antarctic Circumnavigation Expedition (ACE). (Version 1.0) [Data set]. Zenodo. http://doi.org/10.5281/zenodo.3250980";
    String contributors "[{'title': 'Jörg Rickli', 'path': 'https://orcid.org/0000-0001-8186-2750', 'email': '', 'role': 'author', 'organisation': 'ETH Zurich, Switzerland'}, {'title': 'David J. Janssen', 'path': 'https://orcid.org/0000-0002-9091-8936', 'email': '', 'role': 'author', 'organisation': 'Institute of Geological Sciences & Oeschger Center for Climate Change Research, University of Bern, Switzerland'}, {'title': 'Christel S. Hassler', 'path': 'https://orcid.org/0000-0002-8976-5469', 'email': '', 'role': 'author', 'organisation': 'Department F.-A. Forel for Environmental and Aquatic Sciences, University of Geneva, Switzerland; Swiss Polar Institute, Switzerland'}, {'title': 'Michael J. Ellwood', 'path': 'https://orcid.org/0000-0003-4288-8530', 'email': 'samuel.jaccard@geo.unibe.ch', 'role': 'author', 'organisation': 'Research School of Earth Sciences, Australian National University, Australia'}, {'title': 'Samuel L. Jaccard', 'path': 'https://orcid.org/0000-0002-5793-0896', 'email': '', 'role': 'author', 'organisation': 'Institute of Geological Sciences & Oeschger Center for Climate Change Research, University of Bern, Switzerland'}]";
    String Conventions "COARDS, CF-1.6, ACDD-1.3";
    String creator_name "Jörg Rickli";
    String creator_type "institution";
    String creator_url "https://orcid.org/0000-0001-8186-2750";
    String DOI "https://doi.org/10.5281/zenodo.3250980";
    Float64 Easternmost_Easting 167.36;
    Float64 geospatial_lat_max -46.393;
    Float64 geospatial_lat_min -67.29;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max 167.36;
    Float64 geospatial_lon_min -67.919;
    String geospatial_lon_units "degrees_east";
    Float64 geospatial_vertical_max 1000.0;
    Float64 geospatial_vertical_min 15.0;
    String geospatial_vertical_positive "down";
    String geospatial_vertical_units "m";
    String history 
"2020-10-27T14:51:28Z (local files)
2020-10-27T14:51:28Z https://erddap.emodnet-physics.eu/erddap/tabledap/ZENODO_3250980.html";
    String infoUrl "https://doi.org/10.5281/zenodo.3250980";
    String institution "ETH Zurich, Switzerland";
    String keywords "ACE, Antarctic Circumnavigation Expedition, Antarctica, Balleny Islands, chromium isotope, Cr isotope, Drake Passage, seawater, Southern Ocean, trace metal rosette";
    String license "CC-BY-4.0";
    Float64 Northernmost_Northing -46.393;
    String platform_code "UBXH3";
    String platform_name "R/V Akademik Tryoshnikov";
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing -67.29;
    String standard_name_vocabulary "CF Standard Name Table v55";
    String summary "Dissolved seawater chromium (Cr) concentrations and stable isotope compositions measured on samples collected with a trace metal clean rosette system in the Southern Ocean. Stations TM 7 to TM 12 reflect a north-south transect from Hobart, Tasmania to Mertz Glacier in Antarctica. Stations TM 14 and TM 15 neighbour the Balleny Islands. Stations TM 18 and TM 20 are located in the Drake Passage. Water samples were collected down to a depth of 1000 metres. The water was filtered in a class 100 clean container aboard the ship through pre-rinsed Supor Acropak capsule filters (0.2 um). Subsequently the samples were acidified and stored at a pH < 2 for several months prior to analysis. Reported values therefore represent bulk seawater chromium (Cr III and Cr VI). The data was obtained using the double-spike technique.";
    String time_coverage_end "2017-02-19T03:05:55Z";
    String time_coverage_start "2017-01-17T07:23:53Z";
    String title "Dissolved seawater chromium (Cr) concentrations and stable isotope compositions measured on samples collected with a trace metal clean rosette system in the Southern Ocean";
    String type "ferrybox/ship";
    Float64 Westernmost_Easting -67.919;
  }
}

 

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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