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Dataset Title:  SPI - Nutrient concentration in seawater samples, collected from the underway
supply, CTD and trace metal rosettes in the Southern Ocean during the austral
summer of 2016/2017, on board the Antarctic Circumnavigation Expedition (ACE).
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Institution:  SPI   (Dataset ID: SPI_10_5281_zenodo_2616605)
Information:  Summary ? | License ? | FGDC | ISO 19115 | Metadata | Background (external link) | Make a graph
 
Variable ?   Optional
Constraint #1 ?
Optional
Constraint #2 ?
   Minimum ?
 
   Maximum ?
 
 ace_station_number ?          2    103
 ace_event_number ?          75    3117
 date_time_sampling (Time, UTC) ?          2016-12-28T06:55:00Z    2017-03-16T09:53:00Z
 latitude (degrees_north) ?          -71.6993    -43.981
  < slider >
 longitude (degrees_east) ?          -165.0198    167.3921
  < slider >
 sampling_method ?          "ctd"    "underway"
 depth (m) ?          -2147483647    4000
  < slider >
 ace_sample_number ?          "AT/ACE/1/15/007/26..."    "AT/ACE/3/15/075/31..."
 measuring_date ?          "2017-11-14"    "2018-02-02"
 concentration_of_nitrous_oxide (umol L-1) ?          -0.17    37.35
 standard_deviation_of_concentration_of_nitrous_oxide (umol L-1) ?          0.0    2.82
 concentration_of_phosphate (umol L-1) ?          0.03    73.67
 standard_deviation_of_concentration_of_phosphate (umol L-1) ?          0.0    1.75
 concentration_of_nitrite (umol L-1) ?          -0.01    42.58
 standard_deviation_of_concentration_of_nitrite (umol L-1) ?          0.0    1.45
 concentration_of_silicic_acid (umol L-1) ?          0.0    119.89
 standard_deviation_of_concentration_of_silicic_acid (umol L-1) ?          0.0    4.97
 concentration_of_ammonium (umol L-1) ?          -0.06    15.58
 standard_deviation_of_concentration_of_ammonium (umol L-1) ?          0.0    1.25
 concentration_of_nitrate (umol L-1) ?          -43.93    37.36
 standard_deviation_of_concentration_of_nitrate (umol L-1) ?          0.0    2.8
 comments ?          "Sample collection ..."    "Sample collection ..."
 
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The Dataset Attribute Structure (.das) for this Dataset

Attributes {
 s {
  ace_station_number {
    Int32 _ChunkSizes 1024;
    Int32 actual_range 2, 103;
    String description "Unique number of oceanographic sampling station at which water samples were collected";
    String spi_original_name "ACE station number";
  }
  ace_event_number {
    Int32 _ChunkSizes 1024;
    Int32 actual_range 75, 3117;
    String description "Unique number of sampling event within ACE from which water samples were collected";
    String spi_original_name "ACE event number";
  }
  date_time_sampling {
    Int32 _ChunkSizes 512;
    String _CoordinateAxisType "Time";
    Float64 actual_range 1.4829081e+9, 1.48965798e+9;
    String axis "T";
    String description "time";
    String ioos_category "Time";
    String long_name "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 -71.6993, -43.981;
    String attribute "Latitude of the vessel’s geographical position at the time of sampling event";
    String axis "Y";
    String description "Latitude at which the sampling event took place [decimal degrees north]";
    String ioos_category "Location";
    String long_name "Latitude";
    String spi_original_name "latitude decimal degrees N";
    String standard_name "latitude";
    String units "degrees_north";
  }
  longitude {
    Int32 _ChunkSizes 512;
    String _CoordinateAxisType "Lon";
    Float64 actual_range -165.0198, 167.3921;
    String attribute "Longitude of the vessel’s geographical position at the time of sampling event";
    String axis "X";
    String description "Longitude at which the sampling event took place [decimal degrees east]";
    String ioos_category "Location";
    String long_name "Longitude";
    String spi_original_name "longitude decimal degrees E";
    String standard_name "longitude";
    String units "degrees_east";
  }
  sampling_method {
    Int32 _ChunkSizes 1, 19;
    String description "Instrument from which the samples were taken or collected. ctd – water taken from the niskin bottles on the conductivity, temperature, depth (CTD) recorder rosette. trace metal rosette – water taken from the niskin bottles on the trace metal rosette. Underway – water taken from the continuously flowing water line from an intake approximately 5 m below the surface of the water. MilliQ – water taken system that produces MilliQ water.";
    String spi_original_name "sampling method";
  }
  depth {
    Int32 _ChunkSizes 1024;
    String _CoordinateAxisType "Height";
    String _CoordinateZisPositive "down";
    Int32 actual_range -2147483647, 4000;
    String attribute "Depth below sea surface at which the seawater sample was collected";
    String axis "Z";
    String description "Depth of water from where the sample was collected [metres]";
    String ioos_category "Location";
    String long_name "Depth";
    String positive "down";
    String spi_original_name "depth of sample m";
    String standard_name "depth";
    String units "m";
  }
  ace_sample_number {
    Int32 _ChunkSizes 1, 39;
    String description "Unique sample number for the sample within the ACE expedition. In format shipname/ACE/legnumber/projectnumber/julianday(UTC]/eventnumber/PIinitials/projectsamplenumber";
    String spi_original_name "ACE sample number";
  }
  measuring_date {
    Int32 _ChunkSizes 1, 10;
    String description "Date when analysis was performed on sample [UTC]";
    String spi_original_name "measuring date utc";
  }
  concentration_of_nitrous_oxide {
    Int32 _ChunkSizes 512;
    Float64 actual_range -0.17, 37.35;
    String description "Concentration of nitrous oxide NOx [µmol per litre]";
    String spi_original_name "nitrous oxide µmol/L";
    String units "umol L-1";
  }
  standard_deviation_of_concentration_of_nitrous_oxide {
    Int32 _ChunkSizes 512;
    Float64 actual_range 0.0, 2.82;
    String description "Standard deviation of measurements of concentration of nitrous oxide NOx [µmol per litre]";
    String spi_original_name "standard deviation nitrous oxide µmol/L";
    String units "umol L-1";
  }
  concentration_of_phosphate {
    Int32 _ChunkSizes 512;
    Float64 actual_range 0.03, 73.67;
    String description "Concentration of phosphate PO4 [µmol per litre]";
    String spi_original_name "phosphate µmol/L";
    String units "umol L-1";
  }
  standard_deviation_of_concentration_of_phosphate {
    Int32 _ChunkSizes 512;
    Float64 actual_range 0.0, 1.75;
    String description "Standard deviation of concentration of phosphate PO4 [µmol per litre]";
    String spi_original_name "standard deviation phosphate µmol/L";
    String units "umol L-1";
  }
  concentration_of_nitrite {
    Int32 _ChunkSizes 512;
    Float64 actual_range -0.01, 42.58;
    String description "Concentration of nitrite [µmol per litre]";
    String spi_original_name "nitrite µmol/L";
    String units "umol L-1";
  }
  standard_deviation_of_concentration_of_nitrite {
    Int32 _ChunkSizes 512;
    Float64 actual_range 0.0, 1.45;
    String description "Standard deviation of concentration of nitrite [µmol per litre]";
    String spi_original_name "standard deviation nitrite µmol/L";
    String units "umol L-1";
  }
  concentration_of_silicic_acid {
    Int32 _ChunkSizes 512;
    Float64 actual_range 0.0, 119.89;
    String description "Concentration of silicic acid Si [µmol per litre]";
    String spi_original_name "silicic acid µmol/L";
    String units "umol L-1";
  }
  standard_deviation_of_concentration_of_silicic_acid {
    Int32 _ChunkSizes 512;
    Float64 actual_range 0.0, 4.97;
    String description "Standard deviation of concentration of silicate [µmol per litre]";
    String spi_original_name "standard deviation silicic acid µmol/L";
    String units "umol L-1";
  }
  concentration_of_ammonium {
    Int32 _ChunkSizes 512;
    Float64 actual_range -0.06, 15.58;
    String description "Concentration of ammonium NH4 [µmol per litre]";
    String spi_original_name "ammonium µmol/L";
    String units "umol L-1";
  }
  standard_deviation_of_concentration_of_ammonium {
    Int32 _ChunkSizes 512;
    Float64 actual_range 0.0, 1.25;
    String description "Standard deviation of concentration of ammonium NH4 [µmol per litre]";
    String spi_original_name "standard deviation ammonium µmol/L";
    String units "umol L-1";
  }
  concentration_of_nitrate {
    Int32 _ChunkSizes 512;
    Float64 actual_range -43.93, 37.36;
    String description "Concentration of nitrate [µmol per litre]";
    String spi_original_name "nitrate µmol/L";
    String units "umol L-1";
  }
  standard_deviation_of_concentration_of_nitrate {
    Int32 _ChunkSizes 512;
    Float64 actual_range 0.0, 2.8;
    String description "Standard deviation of concentration of nitrate [µmol per litre]";
    String spi_original_name "standard deviation nitrate µmol/L";
    String units "umol L-1";
  }
  comments {
    Int32 _ChunkSizes 1, 86;
    String description "Additional information to help understanding of data";
    String spi_original_name "comments";
  }
 }
  NC_GLOBAL {
    String cdm_data_type "Other";
    String citation "Hassler, C. and Ellwood, M. (2020). Nutrient concentration in seawater samples, collected from the underway supply, CTD and trace metal rosettes in the Southern Ocean during the austral summer of 2016/2017, on board the Antarctic Circumnavigation Expedition (ACE). (Version 1.1) [Data set]. Zenodo. https://doi.org/10.5281/zenodo.3923586";
    String contributors "[{'title': 'Christel Hassler', 'path': 'https://orcid.org/0000-0002-8976-5469', 'email': 'christel.hassler@epfl.ch', 'role': 'author', 'organisation': 'Department of F.-A. Forel for Environmental and Aquatic Sciences, University of Geneva, Switzerland'}, {'title': 'Michael Ellwood', 'path': 'https://orcid.org/0000-0003-4288-8530', 'role': 'author', 'organisation': 'Australian National University'}]";
    String Conventions "COARDS, CF-1.6, ACDD-1.3";
    String creator_name "Christel Hassler";
    String creator_type "institution";
    String creator_url "https://orcid.org/0000-0002-8976-5469";
    String DOI "https://doi.org/10.5281/zenodo.3923586";
    Float64 Easternmost_Easting 167.3921;
    Float64 geospatial_lat_max -43.981;
    Float64 geospatial_lat_min -71.6993;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max 167.3921;
    Float64 geospatial_lon_min -165.0198;
    String geospatial_lon_units "degrees_east";
    Float64 geospatial_vertical_max 4000.0;
    Float64 geospatial_vertical_min -2.147483647e+9;
    String geospatial_vertical_positive "down";
    String geospatial_vertical_units "m";
    String history 
"2020-09-28T08:05:47Z (local files)
2020-09-28T08:05:47Z https://erddap.emodnet-physics.eu/erddap/tabledap/SPI_10_5281_zenodo_2616605.html";
    String infoUrl "https://doi.org/10.5281/zenodo.3923586";
    String institution "SPI";
    String keywords "ACE, ammonium, Antarctic Circumnavigation Expedition, Antarctica, chemistry, colorimetric technique, CTD, flow injection, nitrate, nitrite, nitrous oxide, nutrient, oceanography, phosphate, QuAAtro Seal Analytical autoanalyser, seawater, silicate, silicic acid, Southern Ocean, TMR, trace metal, trace metal rosette, underway";
    String license "CC-BY-4.0";
    Float64 Northernmost_Northing -43.981;
    String platform_code "UBXH3_ACE_2616605";
    String platform_name "R/V Akademik Tryoshnikov";
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing -71.6993;
    String standard_name_vocabulary "CF Standard Name Table v55";
    String summary "This dataset presents concentrations of nutrients (µmol/L): nitrous oxide (NOx), nitrate, nitrite, ammonium (NH4), phosphate (PO4) and silicic acid (Si), measured in samples of seawater during the Antarctic Circumnavigation Expedition (ACE). Samples were collected from CTD and trace metal rosette (TMR) deployments, as well as from the underway water supply on board, then analysed by flow injection following certified standards. This data was collected to support physical, chemical and biological oceanography studies in the Southern Ocean, conducted as part of ACE during the austral summer of 2016/2017.";
    String title "SPI - Nutrient concentration in seawater samples, collected from the underway supply, CTD and trace metal rosettes in the Southern Ocean during the austral summer of 2016/2017, on board the Antarctic Circumnavigation Expedition (ACE).";
    String type "ferrybox/ship";
    Float64 Westernmost_Easting -165.0198;
  }
}

 

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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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