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Dataset Title:  Nitrate, nitrite, and nitrous oxide isotope measurements from the Eastern
Tropical South Pacific ocean collected on RVIB Nathaniel B. Palmer cruise
NBP1305 from June to July 2013
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Institution:  BCO-DMO   (Dataset ID: bcodmo_dataset_744679)
Range: longitude = -85.9989 to -70.58334°E, latitude = -22.21654 to -11.99976°N, depth = 1.71 to 3501.03m, time = 2013-06-27 to 2013-07-19
Information:  Summary ? | License ? | ISO 19115 | Metadata | Background (external link) | Data Access Form | Files
 
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The Dataset Attribute Structure (.das) for this Dataset

Attributes {
 s {
  CTD_cast {
    Byte _FillValue 127;
    Byte actual_range 1, 60;
    String bcodmo_name "cast";
    String description "cast identifier from cruise";
    String long_name "CTD Cast";
    String units "unitless";
  }
  STN {
    String bcodmo_name "station";
    String description "station identifier from cruise";
    String long_name "STN";
    String units "unitless";
  }
  time {
    String _CoordinateAxisType "Time";
    Float64 actual_range 1.3722912e+9, 1.374192e+9;
    String axis "T";
    String bcodmo_name "date";
    String description "date; formatted as yyyy-mm-dd";
    String ioos_category "Time";
    String long_name "Date";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P01/current/ADATAA01/";
    String source_name "date";
    String standard_name "time";
    String time_origin "01-JAN-1970 00:00:00";
    String time_precision "1970-01-01";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  depth {
    String _CoordinateAxisType "Height";
    String _CoordinateZisPositive "down";
    Float64 _FillValue NaN;
    Float64 actual_range 1.71, 3501.03;
    String axis "Z";
    String bcodmo_name "depth";
    Float64 colorBarMaximum 8000.0;
    Float64 colorBarMinimum -8000.0;
    String colorBarPalette "TopographyDepth";
    String description "sample depth";
    String ioos_category "Location";
    String long_name "Depth";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P09/current/DEPH/";
    String positive "down";
    String standard_name "depth";
    String units "m";
  }
  PRESSURE {
    Float32 _FillValue NaN;
    Float32 actual_range 2.01, 3550.9;
    String bcodmo_name "pressure";
    String description "pressure";
    String long_name "PRESSURE";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P01/current/PRESPR01/";
    String units "decibars";
  }
  latitude {
    String _CoordinateAxisType "Lat";
    Float64 _FillValue NaN;
    Float64 actual_range -22.21654, -11.99976;
    String axis "Y";
    String bcodmo_name "latitude";
    Float64 colorBarMaximum 90.0;
    Float64 colorBarMinimum -90.0;
    String description "latitude of sampling";
    String ioos_category "Location";
    String long_name "Latitude";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P09/current/LATX/";
    String standard_name "latitude";
    String units "degrees_north";
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float64 _FillValue NaN;
    Float64 actual_range -85.9989, -70.58334;
    String axis "X";
    String bcodmo_name "longitude";
    Float64 colorBarMaximum 180.0;
    Float64 colorBarMinimum -180.0;
    String description "longitude of sampling";
    String ioos_category "Location";
    String long_name "Longitude";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P09/current/LONX/";
    String standard_name "longitude";
    String units "degrees_east";
  }
  TEMPERATURE {
    Float32 _FillValue NaN;
    Float32 actual_range 1.8, 20.43;
    String bcodmo_name "temperature";
    String description "temperature";
    String long_name "TEMPERATURE";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P01/current/TEMPP901/";
    String units "degrees C";
  }
  SALINITY {
    Float32 _FillValue NaN;
    Float32 actual_range 34.47, 35.64;
    String bcodmo_name "sal";
    Float64 colorBarMaximum 37.0;
    Float64 colorBarMinimum 32.0;
    String description "salinity";
    String long_name "Sea Water Practical Salinity";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P01/current/PSALST01/";
    String units "PSU";
  }
  SIGMA_THETA {
    Float32 _FillValue NaN;
    Float32 actual_range 25.0736, 27.7534;
    String bcodmo_name "sigma_theta";
    String description "sigma-theta";
    String long_name "Sea Water Sigma Theta";
    String units "kg/m3";
  }
  SBE_OXYGEN {
    Float32 _FillValue NaN;
    Float32 actual_range 2.03, 229.85;
    String bcodmo_name "dissolved Oxygen";
    String description "oxygen measured by SBE";
    String long_name "SBE OXYGEN";
    String units "umol/kg";
  }
  O2_SAT_mL_L {
    Float32 _FillValue NaN;
    Float32 actual_range 5.11, 7.69;
    String bcodmo_name "O2sat";
    String description "oxygen saturation in milliters per liter";
    String long_name "O2 SAT M L L";
    String units "ml/L";
  }
  O2_SAT_umol_kg {
    Float32 _FillValue NaN;
    Float32 actual_range 222.45, 334.18;
    String bcodmo_name "O2sat";
    String description "oxygen saturation in micromoles per kilogram";
    String long_name "O2 SAT Umol Kg";
    String units "umol/kg";
  }
  AOU {
    Float32 _FillValue NaN;
    Float32 actual_range 6.83, 281.04;
    String bcodmo_name "AOU";
    String description "apparent oxygen utilization";
    String long_name "AOU";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P02/current/DOXY";
    String units "umol/kg";
  }
  NO3_sample_IDs {
    String bcodmo_name "sample";
    String description "internal reference number for sample";
    String long_name "NO3 Sample IDs";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P02/current/ACYC/";
    String units "unitless";
  }
  sulfamic_treated {
    String bcodmo_name "treatment";
    String description "An asterisk indicates a sample was treated with sulfamic acid to remove nitrite prior to nitrate isotopic analysis";
    String long_name "Sulfamic Treated";
    String units "unitless";
  }
  d15N_NO3 {
    Float32 _FillValue NaN;
    Float32 actual_range 5.36, 31.93;
    String bcodmo_name "dN15_NO3";
    Float64 colorBarMaximum 50.0;
    Float64 colorBarMinimum 0.0;
    String description "delta 15N of nitrate";
    String long_name "Mole Concentration Of Nitrate In Sea Water";
    String units "per mil vs. N2";
  }
  d15N_NO3_sd {
    Float32 _FillValue NaN;
    Float32 actual_range 0.0, 4.08;
    String bcodmo_name "dN15_NO3";
    Float64 colorBarMaximum 50.0;
    Float64 colorBarMinimum 0.0;
    String description "standard deviation of d15N_NO3";
    String long_name "D15 N NO3 Sd";
    String units "per mil";
  }
  d18O_NO3 {
    Float32 _FillValue NaN;
    Float32 actual_range 1.31, 29.45;
    String bcodmo_name "d18O_NO3";
    Float64 colorBarMaximum 50.0;
    Float64 colorBarMinimum 0.0;
    String description "delta 18O of nitrate";
    String long_name "Mole Concentration Of Nitrate In Sea Water";
    String units "per mil vs. VSMOW";
  }
  d18O_NO3_sd {
    Float32 _FillValue NaN;
    Float32 actual_range 0.0, 5.98;
    String bcodmo_name "d18O_NO3";
    Float64 colorBarMaximum 50.0;
    Float64 colorBarMinimum 0.0;
    String description "standard deviation of d18O_NO3";
    String long_name "D18 O NO3 Sd";
    String units "per mil";
  }
  d15N_NO2 {
    Float32 _FillValue NaN;
    Float32 actual_range -37.73, 7.08;
    String bcodmo_name "unknown";
    Float64 colorBarMaximum 1.0;
    Float64 colorBarMinimum 0.0;
    String description "delta 15N of nitrite";
    String long_name "Mole Concentration Of Nitrite In Sea Water";
    String units "per mil vs. N2";
  }
  d15N_NO2_sd {
    Float32 _FillValue NaN;
    Float32 actual_range 0.0, 1.94;
    String bcodmo_name "unknown";
    Float64 colorBarMaximum 50.0;
    Float64 colorBarMinimum 0.0;
    String description "standard deviation of d15N_NO2";
    String long_name "D15 N NO2 Sd";
    String units "per mil";
  }
  d18O_NO2 {
    Float32 _FillValue NaN;
    Float32 actual_range 4.72, 25.06;
    String bcodmo_name "unknown";
    Float64 colorBarMaximum 1.0;
    Float64 colorBarMinimum 0.0;
    String description "d18O of nitrite";
    String long_name "Mole Concentration Of Nitrite In Sea Water";
    String units "per mil vs. VSMOW";
  }
  d18O_NO2_sd {
    Float32 _FillValue NaN;
    Float32 actual_range 0.0, 2.48;
    String bcodmo_name "unknown";
    Float64 colorBarMaximum 50.0;
    Float64 colorBarMinimum 0.0;
    String description "standard deviation of d18O_NO2";
    String long_name "D18 O NO2 Sd";
    String units "per mil";
  }
  N2O_sample_ID_1 {
    Int16 _FillValue 32767;
    Int16 actual_range 1, 325;
    String bcodmo_name "sample";
    String description "internal reference number for sample (replicate 1 of 2)";
    String long_name "N2 O Sample ID 1";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P02/current/ACYC/";
    String units "unitless";
  }
  N2O_sample_ID_2 {
    Int16 _FillValue 32767;
    Int16 actual_range 2, 326;
    String bcodmo_name "sample";
    String description "internal reference number for sample (replicate 2 of 2)";
    String long_name "N2 O Sample ID 2";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P02/current/ACYC/";
    String units "unitless";
  }
  N2O_conc {
    Float32 _FillValue NaN;
    Float32 actual_range 4.37, 68.2;
    String bcodmo_name "Nitrous Oxide";
    String description "N2O concentration";
    String long_name "N2 O Conc";
    String units "nM";
  }
  N2O_conc_sd {
    Float32 _FillValue NaN;
    Float32 actual_range 0.0, 15.04;
    String bcodmo_name "Nitrous Oxide";
    Float64 colorBarMaximum 50.0;
    Float64 colorBarMinimum 0.0;
    String description "standard deviation of N2O_conc";
    String long_name "N2 O Conc Sd";
    String units "nM";
  }
  N2O_SP {
    Float32 _FillValue NaN;
    Float32 actual_range 5.54, 60.37;
    String bcodmo_name "Nitrous Oxide";
    String description "N2O site preference";
    String long_name "N2 O SP";
    String units "per mil";
  }
  N2O_SP_sd {
    Float32 _FillValue NaN;
    Float32 actual_range 0.0, 4.45;
    String bcodmo_name "Nitrous Oxide";
    Float64 colorBarMaximum 50.0;
    Float64 colorBarMinimum 0.0;
    String description "standard deviation of N2O_SP";
    String long_name "N2 O SP Sd";
    String units "per mil";
  }
  d15N_N2O {
    Float32 _FillValue NaN;
    Float32 actual_range 5.8, 20.92;
    String bcodmo_name "unknown";
    String description "delta 15N of N2O";
    String long_name "D15 N N2 O";
    String units "per mil vs. N2";
  }
  d15N_N2O_sd {
    Float32 _FillValue NaN;
    Float32 actual_range 0.0, 1.44;
    String bcodmo_name "unknown";
    Float64 colorBarMaximum 50.0;
    Float64 colorBarMinimum 0.0;
    String description "standard deviation of d15N_N2O";
    String long_name "D15 N N2 O Sd";
    String units "per mil";
  }
  d18O_N2O {
    Float32 _FillValue NaN;
    Float32 actual_range 45.32, 102.61;
    String bcodmo_name "unknown";
    String description "delta 18O of N2O";
    String long_name "D18 O N2 O";
    String units "per mil vs. VSMOW";
  }
  d18O_N2O_sd {
    Float32 _FillValue NaN;
    Float32 actual_range 0.0, 1.32;
    String bcodmo_name "unknown";
    Float64 colorBarMaximum 50.0;
    Float64 colorBarMinimum 0.0;
    String description "standard deviation of d18O_N2O";
    String long_name "D18 O N2 O Sd";
    String units "per mil";
  }
  d15Na {
    Float32 _FillValue NaN;
    Float32 actual_range 10.18, 41.95;
    String bcodmo_name "d15N";
    String description "delta 15N of N2O-alpha";
    String long_name "D15 Na";
    String units "per mil vs. N2";
  }
  d15Na_sd {
    Float32 _FillValue NaN;
    Float32 actual_range 0.1, 1.42;
    String bcodmo_name "d15N";
    Float64 colorBarMaximum 50.0;
    Float64 colorBarMinimum 0.0;
    String description "standard deviation of d15Na";
    String long_name "D15 Na Sd";
    String units "per mil";
  }
  d15Nb {
    Float32 _FillValue NaN;
    Float32 actual_range -19.02, 9.77;
    String bcodmo_name "d15N";
    String description "delta 15N of N2O-beta";
    String long_name "D15 NB";
    String units "per mil vs. N2";
  }
  d15Nb_sd {
    Float32 _FillValue NaN;
    Float32 actual_range 0.1, 3.02;
    String bcodmo_name "d15N";
    Float64 colorBarMaximum 50.0;
    Float64 colorBarMinimum 0.0;
    String description "standard deviation of d15Nb";
    String long_name "D15 NB SD";
    String units "per mil";
  }
  Kelvin {
    Float32 _FillValue NaN;
    Float32 actual_range 274.8, 293.43;
    String bcodmo_name "unknown";
    String description "Temperature in Kelvin";
    String long_name "Kelvin";
    String units "K";
  }
  ln_Ko {
    Float64 _FillValue NaN;
    Float64 actual_range -3.767593915, -3.126894263;
    String bcodmo_name "unknown";
    String description "natural logarithm of Ko, the solubility of N2O in seawater as per Weiss and Price, 1980";
    String long_name "Ln Ko";
    String units "unitless";
  }
  Ko {
    Float64 _FillValue NaN;
    Float64 actual_range 0.023107595, 0.043853784;
    String bcodmo_name "unknown";
    String description "solubility of N2O in seawater, as per Weiss and Price, 1980";
    String long_name "Ko";
    String units "mol N2O/kg/atm";
  }
  N2O_sat_mol_kg {
    Float32 _FillValue NaN;
    Float32 actual_range 7.12e-9, 1.35e-8;
    String bcodmo_name "unknown";
    String description "concentration of N2O at equilibrium with atmosphere at in situ temperature and salinity";
    String long_name "N2 O Sat Mol Kg";
    String units "mol N2O/kg";
  }
  N2O_sat_nmol_L {
    Float32 _FillValue NaN;
    Float32 actual_range 7.3, 13.88;
    String bcodmo_name "unknown";
    String description "concentration of N2O at equilibrium with atmosphere at in situ temperature and salinity, converted to nmol/L";
    String long_name "N2 O Sat Nmol L";
    String units "nmol N2O/L";
  }
  delta_N2O {
    Float32 _FillValue NaN;
    Float32 actual_range -10.17, 59.03;
    String bcodmo_name "unknown";
    String description "N2O supersaturation, deltaN2O = [N2O]obs - [N2O]sat";
    String long_name "Delta N2 O";
    String units "nmol N2O/L";
  }
  ESPIW {
    Float32 _FillValue NaN;
    Float32 actual_range 0.0, 92.94;
    String bcodmo_name "unknown";
    String description "% Eastern South Pacific Intermediate Water, as per Peters et al., 2018 Deep Sea Research II";
    String long_name "ESPIW";
    String units "%";
  }
  ESSW {
    Float32 _FillValue NaN;
    Float32 actual_range 7.06, 102.46;
    String bcodmo_name "unknown";
    String description "% Equatorial Subsurface Water, as per Peters et al., 2018 Deep Sea Research II";
    String long_name "ESSW";
    String units "%";
  }
 }
  NC_GLOBAL {
    String access_formats ".htmlTable,.csv,.json,.mat,.nc,.tsv,.esriCsv,.geoJson,.odvTxt";
    String acquisition_description 
"Samples were collected from a standard Niskin bottle rosette.
 
Nitrate isotope analyses were conducted by denitrifier method (Sigman et al.,
2001; Casciotti et al., 2002) with updates (McIlviin and Casciotti, 2011).
Nitrite was removed from samples containing more than 0.1 uM nitrite, using
sulfuric acid (Granger and Sigman, 2009). Standards include USGS32, USGS34,
and USGS35.
 
Nitrite isotope analyses were conducted by azide method (McIlvin and Altabet,
2005). Standards include N23, N7373, and N10219.
 
Nitrous oxide isotope analyses were conducted as described in McIlvin and
Casciotti, 2010. N2O isotope measurements were calibrated against a laboratory
N2O working gas.
 
The water mass analysis for the oxygen deficient zone waters was conducted as
described in Peters et al., 2018, Deep Sea Research II, Estimating fixed
nitrogen loss and associated isotope effects using concentration and isotope
measurements of NO3-, NO2-, and N2 from the Eastern Tropical South Pacific
oxygen deficient zone.";
    String awards_0_award_nid "650089";
    String awards_0_award_number "OCE-1233339";
    String awards_0_data_url "http://www.nsf.gov/awardsearch/showAward?AWD_ID=1233339";
    String awards_0_funder_name "NSF Division of Ocean Sciences";
    String awards_0_funding_acronym "NSF OCE";
    String awards_0_funding_source_nid "355";
    String awards_0_program_manager "Henrietta N Edmonds";
    String awards_0_program_manager_nid "51517";
    String awards_1_award_nid "744687";
    String awards_1_award_number "OCE-1140404";
    String awards_1_data_url "https://www.nsf.gov/awardsearch/showAward?AWD_ID=1140404";
    String awards_1_funder_name "NSF Division of Ocean Sciences";
    String awards_1_funding_acronym "NSF OCE";
    String awards_1_funding_source_nid "355";
    String awards_1_program_manager "Donald L. Rice";
    String awards_1_program_manager_nid "51467";
    String cdm_data_type "Other";
    String comment 
"ETSP 2013 Nitrate, Nitrite, and Nitrous Oxide Isotopes 
  PI: Karen Casciotti 
  Version: 28 August 2018";
    String Conventions "COARDS, CF-1.6, ACDD-1.3";
    String creator_email "info@bco-dmo.org";
    String creator_name "BCO-DMO";
    String creator_type "institution";
    String creator_url "https://www.bco-dmo.org/";
    String data_source "extract_data_as_tsv version 2.3  19 Dec 2019";
    String date_created "2018-08-28T18:32:28Z";
    String date_modified "2019-03-15T18:10:39Z";
    String defaultDataQuery "&amp;time&lt;now";
    String doi "10.1575/1912/bco-dmo.744679.1";
    Float64 Easternmost_Easting -70.58334;
    Float64 geospatial_lat_max -11.99976;
    Float64 geospatial_lat_min -22.21654;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max -70.58334;
    Float64 geospatial_lon_min -85.9989;
    String geospatial_lon_units "degrees_east";
    Float64 geospatial_vertical_max 3501.03;
    Float64 geospatial_vertical_min 1.71;
    String geospatial_vertical_positive "down";
    String geospatial_vertical_units "m";
    String history 
"2022-08-09T11:41:27Z (local files)
2022-08-09T11:41:27Z https://erddap.bco-dmo.org/tabledap/bcodmo_dataset_744679.das";
    String infoUrl "https://www.bco-dmo.org/dataset/744679";
    String institution "BCO-DMO";
    String instruments_0_acronym "IR Mass Spec";
    String instruments_0_dataset_instrument_description "All isotopic measurements were made on a ThermoFinnigan DeltaPLUS XP isotope ratio mass spectrometer.";
    String instruments_0_dataset_instrument_nid "744813";
    String instruments_0_description "The Isotope-ratio Mass Spectrometer is a particular type of mass spectrometer used to measure the relative abundance of isotopes in a given sample (e.g. VG Prism II Isotope Ratio Mass-Spectrometer).";
    String instruments_0_instrument_external_identifier "https://vocab.nerc.ac.uk/collection/L05/current/LAB16/";
    String instruments_0_instrument_name "Isotope-ratio Mass Spectrometer";
    String instruments_0_instrument_nid "469";
    String instruments_0_supplied_name "ThermoFinnigan DeltaPLUS XP";
    String keywords "aou, apparent, bco, bco-dmo, biological, cast, chemical, chemistry, conc, concentration, conductivity, ctd, CTD_cast, d15, d15N_N2O, d15N_N2O_sd, d15N_NO2, d15N_NO2_sd, d15N_NO3, d15N_NO3_sd, d15Na, d15Na_sd, d15Nb, d15Nb_sd, d18, d18O_N2O, d18O_N2O_sd, d18O_NO2, d18O_NO2_sd, d18O_NO3, d18O_NO3_sd, data, dataset, date, delta, delta_N2O, density, depth, dmo, earth, Earth Science > Oceans > Ocean Chemistry > Nitrate, Earth Science > Oceans > Salinity/Density > Density, Earth Science > Oceans > Salinity/Density > Salinity, erddap, espiw, essw, ids, kelvin, latitude, ln_Ko, longitude, management, mol, mole, mole_concentration_of_nitrate_in_sea_water, mole_concentration_of_nitrite_in_sea_water, n02, N2O_conc, N2O_conc_sd, N2O_sample_ID_1, N2O_sample_ID_2, N2O_sat_mol_kg, N2O_sat_nmol_L, N2O_SP, N2O_SP_sd, nitrate, nitrite, nmol, no2, no3, NO3_sample_IDs, O2, O2_SAT_mL_L, O2_SAT_umol_kg, ocean, oceanography, oceans, office, oxygen, practical, preliminary, pressure, salinity, sample, sat, sbe, SBE_OXYGEN, science, sea, sea_water_practical_salinity, sea_water_sigma_theta, seawater, sigma, SIGMA_THETA, sonde, stn, sulfamic, sulfamic_treated, temperature, theta, time, treated, umol, utilization, water";
    String keywords_vocabulary "GCMD Science Keywords";
    String license "https://www.bco-dmo.org/dataset/744679/license";
    String metadata_source "https://www.bco-dmo.org/api/dataset/744679";
    Float64 Northernmost_Northing -11.99976;
    String param_mapping "{'744679': {'date': 'flag - time', 'latitude': 'flag - latitude', 'DEPTH': 'flag - depth', 'longitude': 'flag - longitude'}}";
    String parameter_source "https://www.bco-dmo.org/mapserver/dataset/744679/parameters";
    String people_0_affiliation "Stanford University";
    String people_0_person_name "Karen L. Casciotti";
    String people_0_person_nid "50980";
    String people_0_role "Principal Investigator";
    String people_0_role_type "originator";
    String people_1_affiliation "Woods Hole Oceanographic Institution";
    String people_1_affiliation_acronym "WHOI BCO-DMO";
    String people_1_person_name "Shannon Rauch";
    String people_1_person_nid "51498";
    String people_1_role "BCO-DMO Data Manager";
    String people_1_role_type "related";
    String project "N2O Cycling";
    String projects_0_acronym "N2O Cycling";
    String projects_0_description 
"The eastern tropical South Pacific (ETSP) is a hot spot for oceanic nitrogen cycling. This region of upwelling and high productivity fuels high rates of oxygen consumption below the mixed layer, nitrate regeneration from nitrification, and ultimately denitrification of nitrate to N2 gas. The climatically important trace gas nitrous oxide (N2O) also reaches extreme high concentrations in the oxycline and extreme low concentrations in the heart of the oxygen minimum zone (OMZ), indicating active cycling in this region. Despite many years of investigation, the mechanism of N2O production in this hot spot is ambiguous because of the potential overlap or coupling of nitrification and denitrification processes at low oxygen tensions.
The investigators employed novel stable isotopic techniques to identify processes involved with nitrous oxide production and consumption in the water column at multiple sites within the eastern tropical South Pacific. They also sought to map the natural distributions of nitrate, nitrite and nitrous oxide concentrations and isotopes at high spatial resolution in order to develop a dataset with which to constrain ocean models based on their rate measurements.
Incubation experiments were carried out at sea to quantify the rates of nitrification and N2O cycling in samples throughout the oxygen minimum zone. In addition, approximately 1000 samples were collected for nitrate and nitrite isotopic analysis and 500 samples for N2O isotopic analysis. The investigators worked closely with other researchers onboard to work towards developing the most coherent picture of nitrogen cycling in the eastern tropical Pacific to date.";
    String projects_0_end_date "2006-01";
    String projects_0_geolocation "Peruvian Oxygen Deficient Zone";
    String projects_0_name "Biogeochemistry of nitrous oxide cycling in the eastern tropical South Pacific";
    String projects_0_project_nid "2271";
    String projects_0_start_date "2005-01";
    String publisher_name "Biological and Chemical Oceanographic Data Management Office (BCO-DMO)";
    String publisher_type "institution";
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing -22.21654;
    String standard_name_vocabulary "CF Standard Name Table v55";
    String summary "Nitrate, nitrite, and nitrous oxide isotope measurements from the Eastern Tropical South Pacific ocean collected on RVIB Nathaniel B. Palmer cruise NBP1305 from June to July 2013. The data in this dataset were published in Peters et al. (2018) and Casciotti et al. (2018).";
    String time_coverage_end "2013-07-19";
    String time_coverage_start "2013-06-27";
    String title "Nitrate, nitrite, and nitrous oxide isotope measurements from the Eastern Tropical South Pacific ocean collected on RVIB Nathaniel B. Palmer cruise NBP1305 from June to July 2013";
    String version "1";
    Float64 Westernmost_Easting -85.9989;
    String xml_source "osprey2erddap.update_xml() v1.3";
  }
}

 

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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