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Title Sum-
Institution Dataset ID
     data   graph     files  public Porewater measurements of nitrate and nitrite concentration and N and O isotopic ratios (d15N
and d18O) collected from sites 3 and 10 on the North Atlantic Long Core Cruise R/V Knorr KN223
from October to December 2014
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The Dataset's Variables and Attributes

Row Type Variable Name Attribute Name Data Type Value
attribute NC_GLOBAL access_formats String .htmlTable,.csv,.json,.mat,.nc,.tsv,.esriCsv,.geoJson
attribute NC_GLOBAL acquisition_description String Samples were collected aboard the R/V Knorr using its long coring system in
November of 2014 on cruise KN-223 in the North Atlantic. Samples used in this
study came from two sediment coring sites located within 90m of each other at
50\u00b037.25'W, 14\u00b024.05'N, and 4455 m water depth. Porewaters were
extracted at approximately 0.5m intervals from two long piston cores (30 and
34 m long) using Rhizon samplers (0.2 mm pore size) and either analyzed
shipboard or frozen until analyses were conducted shore side.

Nitrate and nitrite concentrations were determined shipboard using ion
chromatography with UV detection (D'Hondt et al., 2015). Isotopes were
measured in the Wankel lab (Woods Hole Oceanographic Institution) using an
Isoprime 100 isotope ratio mass spectrometer coupled to a modified TraceGas
prep system similar to that described previously (McIlvin and Casciotti,
2011), which is used to flush, purify and cryogenically trap sample N2O from
converted nitrate or nitrite samples. Nitrate isotopic composition was
measured using the denitrifier method to convert nitrate to N2O, normalized to
international reference materials (USGS 34, USGS 32, and USGS 35) (Sigman et
al., 2001; Casciotti et al., 2002). Nitrite isotope measurements were made
separately using the azide method for conversion of nitrite to N2O (McIlvin
and Altabet, 2005), normalizing to previously calibrated Wankel isotope lab
standards (WILIS 10, 11, and 20) (Buchwald et al., 2016). Where co-occurring
nitrite concentrations were less than 5 times as high as nitrate, nitrite was
removed by addition of sulfamic acid (Granger and Sigman, 2009) prior to the
denitrifier method. In the deepest samples having measurable nitrate, where
concentrations were very low, the N and O isotopic composition of nitrate was
calculated by mass balance using analyses of the combined nitrate + nitrite
pools by the denitrifier method, in which both nitrate and nitrite standards
were also analyzed, together with nitrite isotope values from the azide-only
measurements described previously (Casciotti and McIlvin, 2007).\u00a0
attribute NC_GLOBAL awards_0_award_nid String 554980
attribute NC_GLOBAL awards_0_award_number String OCE-0939564
attribute NC_GLOBAL awards_0_data_url String http://www.nsf.gov/awardsearch/showAward?AWD_ID=0939564 (external link)
attribute NC_GLOBAL awards_0_funder_name String NSF Division of Ocean Sciences
attribute NC_GLOBAL awards_0_funding_acronym String NSF OCE
attribute NC_GLOBAL awards_0_funding_source_nid String 355
attribute NC_GLOBAL awards_0_program_manager String David L. Garrison
attribute NC_GLOBAL awards_0_program_manager_nid String 50534
attribute NC_GLOBAL awards_1_award_nid String 567400
attribute NC_GLOBAL awards_1_award_number String OCE-1433150
attribute NC_GLOBAL awards_1_data_url String http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=1433150 (external link)
attribute NC_GLOBAL awards_1_funder_name String NSF Division of Ocean Sciences
attribute NC_GLOBAL awards_1_funding_acronym String NSF OCE
attribute NC_GLOBAL awards_1_funding_source_nid String 355
attribute NC_GLOBAL awards_1_program_manager String Candace O. Major
attribute NC_GLOBAL awards_1_program_manager_nid String 51690
attribute NC_GLOBAL awards_2_award_nid String 748796
attribute NC_GLOBAL awards_2_award_number String OCE-1537485
attribute NC_GLOBAL awards_2_data_url String https://www.nsf.gov/awardsearch/showAward?AWD_ID=1537485 (external link)
attribute NC_GLOBAL awards_2_funder_name String NSF Division of Ocean Sciences
attribute NC_GLOBAL awards_2_funding_acronym String NSF OCE
attribute NC_GLOBAL awards_2_funding_source_nid String 355
attribute NC_GLOBAL awards_2_program_manager String Candace O. Major
attribute NC_GLOBAL awards_2_program_manager_nid String 51690
attribute NC_GLOBAL cdm_data_type String Other
attribute NC_GLOBAL comment String Porewater measurements of nitrate and nitrite,
and N and O isotopic ratios
PI: Carolyn Buchwald
Co-PIs: Scott Wankel and Arthur Spivack
Version: 1
Version date: 26 October 2018
attribute NC_GLOBAL Conventions String COARDS, CF-1.6, ACDD-1.3
attribute NC_GLOBAL creator_email String info at bco-dmo.org
attribute NC_GLOBAL creator_name String BCO-DMO
attribute NC_GLOBAL creator_type String institution
attribute NC_GLOBAL creator_url String https://www.bco-dmo.org/ (external link)
attribute NC_GLOBAL data_source String extract_data_as_tsv version 2.3 19 Dec 2019
attribute NC_GLOBAL date_created String 2018-10-25T16:32:37Z
attribute NC_GLOBAL date_modified String 2019-03-15T15:37:11Z
attribute NC_GLOBAL defaultDataQuery String &time<now
attribute NC_GLOBAL doi String 10.1575/1912/bco-dmo.748792.1
attribute NC_GLOBAL Easternmost_Easting double -50.6203
attribute NC_GLOBAL geospatial_lat_max double 14.4007
attribute NC_GLOBAL geospatial_lat_min double 14.4
attribute NC_GLOBAL geospatial_lat_units String degrees_north
attribute NC_GLOBAL geospatial_lon_max double -50.6203
attribute NC_GLOBAL geospatial_lon_min double -50.6207
attribute NC_GLOBAL geospatial_lon_units String degrees_east
attribute NC_GLOBAL infoUrl String https://www.bco-dmo.org/dataset/748792 (external link)
attribute NC_GLOBAL institution String BCO-DMO
attribute NC_GLOBAL instruments_0_acronym String IR Mass Spec
attribute NC_GLOBAL instruments_0_dataset_instrument_description String Isoprime 100 isotope ratio mass spectrometer coupled to a modified TraceGas prep system
attribute NC_GLOBAL instruments_0_dataset_instrument_nid String 748811
attribute NC_GLOBAL instruments_0_description String 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).
attribute NC_GLOBAL instruments_0_instrument_external_identifier String https://vocab.nerc.ac.uk/collection/L05/current/LAB16/ (external link)
attribute NC_GLOBAL instruments_0_instrument_name String Isotope-ratio Mass Spectrometer
attribute NC_GLOBAL instruments_0_instrument_nid String 469
attribute NC_GLOBAL instruments_0_supplied_name String Isoprime 100 isotope ratio mass spectrometer
attribute NC_GLOBAL instruments_1_acronym String Piston Corer
attribute NC_GLOBAL instruments_1_dataset_instrument_nid String 748805
attribute NC_GLOBAL instruments_1_description String The piston corer is a type of bottom sediment sampling device. A long, heavy tube is plunged into the seafloor to extract samples of mud sediment. A piston corer uses a "free fall" of the coring rig to achieve a greater initial force on impact than gravity coring. A sliding piston inside the core barrel reduces inside wall friction with the sediment and helps to evacuate displaced water from the top of the corer. A piston corer is capable of extracting core samples up to 90 feet in length.
attribute NC_GLOBAL instruments_1_instrument_external_identifier String https://vocab.nerc.ac.uk/collection/L05/current/51/ (external link)
attribute NC_GLOBAL instruments_1_instrument_name String Piston Corer
attribute NC_GLOBAL instruments_1_instrument_nid String 519
attribute NC_GLOBAL instruments_1_supplied_name String R/V Knorr long coring system
attribute NC_GLOBAL instruments_2_acronym String Ion Chromatograph
attribute NC_GLOBAL instruments_2_dataset_instrument_nid String 748810
attribute NC_GLOBAL instruments_2_description String Ion chromatography is a form of liquid chromatography that measures concentrations of ionic species by separating them based on their interaction with a resin. Ionic species separate differently depending on species type and size. Ion chromatographs are able to measure concentrations of major anions, such as fluoride, chloride, nitrate, nitrite, and sulfate, as well as major cations such as lithium, sodium, ammonium, potassium, calcium, and magnesium in the parts-per-billion (ppb) range. (from http://serc.carleton.edu/microbelife/research_methods/biogeochemical/ic.html)
attribute NC_GLOBAL instruments_2_instrument_name String Ion Chromatograph
attribute NC_GLOBAL instruments_2_instrument_nid String 662
attribute NC_GLOBAL instruments_2_supplied_name String ion chromatography with UV detection
attribute NC_GLOBAL instruments_3_dataset_instrument_description String Rhizon samplers extract small volumes of pore water from soil and sediments. See: https://www.rhizosphere.com/
attribute NC_GLOBAL instruments_3_dataset_instrument_nid String 748809
attribute NC_GLOBAL instruments_3_description String A device that collects samples of pore water from various horizons below the seabed.
attribute NC_GLOBAL instruments_3_instrument_name String Sediment Porewater Sampler
attribute NC_GLOBAL instruments_3_instrument_nid String 748807
attribute NC_GLOBAL instruments_3_supplied_name String Rhizon samplers
attribute NC_GLOBAL keywords String ammonia, ammonium, bco, bco-dmo, biological, chemical, chemistry, concentration, d15N_Nitrate, d15N_Nitrite, d18O_Nitrate, d18O_Nitrite, data, dataset, depth, Depth_for_Ammonium, Depth_for_Nitrate_and_Nitrate, Depth_for_Nitrate_isotopes, Depth_for_Nitrite_isotopes, Depth_for_O2, dmo, earth, Earth Science > Oceans > Ocean Chemistry > Ammonia, Earth Science > Oceans > Ocean Chemistry > Nitrate, erddap, latitude, longitude, management, mole, mole_concentration_of_ammonium_in_sea_water, mole_concentration_of_nitrate_in_sea_water, mole_concentration_of_nitrite_in_sea_water, n02, nh4, nitrate, nitrite, no3, number, O2, ocean, oceanography, oceans, office, oxygen, preliminary, science, sea, seawater, site, Site_Number, water
attribute NC_GLOBAL keywords_vocabulary String GCMD Science Keywords
attribute NC_GLOBAL license String https://www.bco-dmo.org/dataset/748792/license (external link)
attribute NC_GLOBAL metadata_source String https://www.bco-dmo.org/api/dataset/748792 (external link)
attribute NC_GLOBAL Northernmost_Northing double 14.4007
attribute NC_GLOBAL param_mapping String {'748792': {'Latitude': 'flag - latitude', 'Depth_for_Ammonium': 'flag - depth', 'Longitude': 'flag - longitude'}}
attribute NC_GLOBAL parameter_source String https://www.bco-dmo.org/mapserver/dataset/748792/parameters (external link)
attribute NC_GLOBAL people_0_affiliation String Woods Hole Oceanographic Institution
attribute NC_GLOBAL people_0_affiliation_acronym String WHOI
attribute NC_GLOBAL people_0_person_name String Dr Carolyn Buchwald
attribute NC_GLOBAL people_0_person_nid String 637913
attribute NC_GLOBAL people_0_role String Principal Investigator
attribute NC_GLOBAL people_0_role_type String originator
attribute NC_GLOBAL people_1_affiliation String University of Rhode Island
attribute NC_GLOBAL people_1_affiliation_acronym String URI-GSO
attribute NC_GLOBAL people_1_person_name String Dr Arthur J. Spivack
attribute NC_GLOBAL people_1_person_nid String 51425
attribute NC_GLOBAL people_1_role String Co-Principal Investigator
attribute NC_GLOBAL people_1_role_type String originator
attribute NC_GLOBAL people_2_affiliation String Woods Hole Oceanographic Institution
attribute NC_GLOBAL people_2_affiliation_acronym String WHOI
attribute NC_GLOBAL people_2_person_name String Scott Wankel
attribute NC_GLOBAL people_2_person_nid String 637907
attribute NC_GLOBAL people_2_role String Co-Principal Investigator
attribute NC_GLOBAL people_2_role_type String originator
attribute NC_GLOBAL people_3_affiliation String Woods Hole Oceanographic Institution
attribute NC_GLOBAL people_3_affiliation_acronym String WHOI BCO-DMO
attribute NC_GLOBAL people_3_person_name String Shannon Rauch
attribute NC_GLOBAL people_3_person_nid String 51498
attribute NC_GLOBAL people_3_role String BCO-DMO Data Manager
attribute NC_GLOBAL people_3_role_type String related
attribute NC_GLOBAL project String North Atlantic Nitrate and Nitrite
attribute NC_GLOBAL projects_0_acronym String North Atlantic Nitrate and Nitrite
attribute NC_GLOBAL projects_0_description String Project Abstract:
Deep-sea sediments in the oligotrophic ocean host a diverse array of microbes that are involved in multiple processes within the nitrogen cycle. Using measurements of nitrate and nitrite, and their stable isotopes (d15N and d18O) in sedimentary pore fluids, we have been developing approaches for determining the distribution and magnitude of key processes in the oligotrophic sediments of the North Atlantic. While concentration profiles alone indicate the production of nitrate through nitrification in the surface sediments and the reduction of the nitrate deeper in the absence of oxygen, the dual stable isotope profiles of NO3- and NO2- demonstrate clear evidence of further complexity; specifically, that nitrite oxidation occurs deeper in the sediments as well, apparently in the absence of O2. A number of lines of evidence contribute to this refined understanding of the distribution of N cycling processes in these environments, including large differences in the nitrate and nitrite d15N, as well as the evolution of a greater than 1:1 relationship between the d15N and d18O of nitrate. We used a 1D inverse model that predicts the distribution and rates of different oxidative and reductive nitrogen cycling processes throughout these vertical profiles. Our analysis reveals that nitrate reduction and nitrite oxidation co-occur between 0 and 10 meters, and that the ratio of these processes changes in relation to the abundance of porewater oxygen. In the upper profile where dissolved oxygen is more abundant oxidative processes (e.g., nitrite re-oxidation) play an exceptionally large role, as reflected in the very high slope for the evolving relationship between d15N and d18O nitrate. Below the depth of oxygen penetration, while nitrate reduction becomes a substantially more important processes, a clear indication of oxidation remains – as reflected in the large difference between nitrate and nitrite d15N. All rates were predicted to be slow on the order of 0.1 mM per year, which was substantiated by d18O values of nitrite reflecting complete isotopic equilibration with water.
This project was funded by a C-DEBI Postdoctoral Fellowship to Carolyn Buchwald (advisor: Scott Wankel).
attribute NC_GLOBAL projects_0_end_date String 2016-05
attribute NC_GLOBAL projects_0_geolocation String North Pond, North Atlantic
attribute NC_GLOBAL projects_0_name String Determining the rates of denitrification, nitrification, and nitrogen fixation using natural abundance isotope profiles in North Atlantic sediments
attribute NC_GLOBAL projects_0_project_nid String 748767
attribute NC_GLOBAL projects_0_project_website String https://www.darkenergybiosphere.org/award/determining-the-rates-of-denitrification-nitrification-and-nitrogen-fixation-using-natural-abundance-isotope-profiles-in-north-pond-sediments/ (external link)
attribute NC_GLOBAL projects_0_start_date String 2014-06
attribute NC_GLOBAL publisher_name String Biological and Chemical Oceanographic Data Management Office (BCO-DMO)
attribute NC_GLOBAL publisher_type String institution
attribute NC_GLOBAL sourceUrl String (local files)
attribute NC_GLOBAL Southernmost_Northing double 14.4
attribute NC_GLOBAL standard_name_vocabulary String CF Standard Name Table v55
attribute NC_GLOBAL summary String Porewater measurements of nitrate and nitrite concentration and N and O isotopic ratios (d15N and d18O) collected from sites 3 and 10 on the North Atlantic Long Core Cruise R/V Knorr KN223 from October to December 2014.
attribute NC_GLOBAL title String Porewater measurements of nitrate and nitrite concentration and N and O isotopic ratios (d15N and d18O) collected from sites 3 and 10 on the North Atlantic Long Core Cruise R/V Knorr KN223 from October to December 2014
attribute NC_GLOBAL version String 1
attribute NC_GLOBAL Westernmost_Easting double -50.6207
attribute NC_GLOBAL xml_source String osprey2erddap.update_xml() v1.3
variable Site_Number   byte  
attribute Site_Number _FillValue byte 127
attribute Site_Number actual_range byte 3, 10
attribute Site_Number bcodmo_name String site
attribute Site_Number colorBarMaximum double 100.0
attribute Site_Number colorBarMinimum double 0.0
attribute Site_Number description String Site number where samples were collected
attribute Site_Number long_name String Site Number
attribute Site_Number units String unitless
variable latitude   double  
attribute latitude _CoordinateAxisType String Lat
attribute latitude _FillValue double NaN
attribute latitude actual_range double 14.4, 14.4007
attribute latitude axis String Y
attribute latitude bcodmo_name String latitude
attribute latitude colorBarMaximum double 90.0
attribute latitude colorBarMinimum double -90.0
attribute latitude description String Latitude of site; North = positive values
attribute latitude ioos_category String Location
attribute latitude long_name String Latitude
attribute latitude nerc_identifier String https://vocab.nerc.ac.uk/collection/P09/current/LATX/ (external link)
attribute latitude standard_name String latitude
attribute latitude units String degrees_north
variable longitude   double  
attribute longitude _CoordinateAxisType String Lon
attribute longitude _FillValue double NaN
attribute longitude actual_range double -50.6207, -50.6203
attribute longitude axis String X
attribute longitude bcodmo_name String longitude
attribute longitude colorBarMaximum double 180.0
attribute longitude colorBarMinimum double -180.0
attribute longitude description String Longitude of site; East = positive values
attribute longitude ioos_category String Location
attribute longitude long_name String Longitude
attribute longitude nerc_identifier String https://vocab.nerc.ac.uk/collection/P09/current/LONX/ (external link)
attribute longitude standard_name String longitude
attribute longitude units String degrees_east
variable Depth_for_O2   float  
attribute Depth_for_O2 _FillValue float NaN
attribute Depth_for_O2 actual_range float 0.0, 31.81
attribute Depth_for_O2 bcodmo_name String depth_bsf
attribute Depth_for_O2 colorBarMaximum double 8000.0
attribute Depth_for_O2 colorBarMinimum double -8000.0
attribute Depth_for_O2 colorBarPalette String TopographyDepth
attribute Depth_for_O2 description String Depth of sample for oxygen (O2) measurement
attribute Depth_for_O2 long_name String Depth
attribute Depth_for_O2 standard_name String depth
attribute Depth_for_O2 units String meters below seafloor (mbsf)
variable Oxygen   float  
attribute Oxygen _FillValue float NaN
attribute Oxygen actual_range float 0.0, 283.4
attribute Oxygen bcodmo_name String dissolved Oxygen
attribute Oxygen description String Oxygen concentration
attribute Oxygen long_name String Oxygen
attribute Oxygen units String micromolar (uM)
variable Depth_for_Nitrate_and_Nitrate   float  
attribute Depth_for_Nitrate_and_Nitrate _FillValue float NaN
attribute Depth_for_Nitrate_and_Nitrate actual_range float 0.02, 32.07
attribute Depth_for_Nitrate_and_Nitrate bcodmo_name String depth_bsf
attribute Depth_for_Nitrate_and_Nitrate colorBarMaximum double 8000.0
attribute Depth_for_Nitrate_and_Nitrate colorBarMinimum double -8000.0
attribute Depth_for_Nitrate_and_Nitrate colorBarPalette String TopographyDepth
attribute Depth_for_Nitrate_and_Nitrate description String Depth of sample for nitrate and nitrite measurements
attribute Depth_for_Nitrate_and_Nitrate long_name String Depth
attribute Depth_for_Nitrate_and_Nitrate standard_name String depth
attribute Depth_for_Nitrate_and_Nitrate units String meters below seafloor (mbsf)
variable Nitrate   float  
attribute Nitrate _FillValue float NaN
attribute Nitrate actual_range float 0.0, 40.6
attribute Nitrate bcodmo_name String NO3
attribute Nitrate colorBarMaximum double 50.0
attribute Nitrate colorBarMinimum double 0.0
attribute Nitrate description String Nitrate concentration
attribute Nitrate long_name String Mole Concentration Of Nitrate In Sea Water
attribute Nitrate nerc_identifier String https://vocab.nerc.ac.uk/collection/P01/current/NTRAIGGS/ (external link)
attribute Nitrate units String micromolar (uM)
variable Nitrite   float  
attribute Nitrite _FillValue float NaN
attribute Nitrite actual_range float 0.0, 19.86
attribute Nitrite bcodmo_name String NO2
attribute Nitrite colorBarMaximum double 1.0
attribute Nitrite colorBarMinimum double 0.0
attribute Nitrite description String Nitrite concentration
attribute Nitrite long_name String Mole Concentration Of Nitrite In Sea Water
attribute Nitrite nerc_identifier String https://vocab.nerc.ac.uk/collection/P01/current/NTRIAAZX/ (external link)
attribute Nitrite units String micromolar (uM)
variable Depth_for_Nitrite_isotopes   float  
attribute Depth_for_Nitrite_isotopes _FillValue float NaN
attribute Depth_for_Nitrite_isotopes actual_range float 4.2, 20.34
attribute Depth_for_Nitrite_isotopes bcodmo_name String depth_bsf
attribute Depth_for_Nitrite_isotopes colorBarMaximum double 8000.0
attribute Depth_for_Nitrite_isotopes colorBarMinimum double -8000.0
attribute Depth_for_Nitrite_isotopes colorBarPalette String TopographyDepth
attribute Depth_for_Nitrite_isotopes description String Depth of sample for nitrite isotope measurements
attribute Depth_for_Nitrite_isotopes long_name String Depth
attribute Depth_for_Nitrite_isotopes standard_name String depth
attribute Depth_for_Nitrite_isotopes units String meters below seafloor (mbsf)
variable d15N_Nitrite   float  
attribute d15N_Nitrite _FillValue float NaN
attribute d15N_Nitrite actual_range float -27.41, 38.23
attribute d15N_Nitrite bcodmo_name String NO2
attribute d15N_Nitrite colorBarMaximum double 1.0
attribute d15N_Nitrite colorBarMinimum double 0.0
attribute d15N_Nitrite description String d15N nitrite
attribute d15N_Nitrite long_name String Mole Concentration Of Nitrite In Sea Water
attribute d15N_Nitrite nerc_identifier String https://vocab.nerc.ac.uk/collection/P01/current/NTRIAAZX/ (external link)
attribute d15N_Nitrite units String per mil (‰)
variable d18O_Nitrite   float  
attribute d18O_Nitrite _FillValue float NaN
attribute d18O_Nitrite actual_range float 14.55, 17.03
attribute d18O_Nitrite bcodmo_name String NO2
attribute d18O_Nitrite colorBarMaximum double 1.0
attribute d18O_Nitrite colorBarMinimum double 0.0
attribute d18O_Nitrite description String d18O nitrite
attribute d18O_Nitrite long_name String Mole Concentration Of Nitrite In Sea Water
attribute d18O_Nitrite nerc_identifier String https://vocab.nerc.ac.uk/collection/P01/current/NTRIAAZX/ (external link)
attribute d18O_Nitrite units String per mil (‰)
variable Depth_for_Nitrate_isotopes   float  
attribute Depth_for_Nitrate_isotopes _FillValue float NaN
attribute Depth_for_Nitrate_isotopes actual_range float 0.02, 9.55
attribute Depth_for_Nitrate_isotopes bcodmo_name String depth_bsf
attribute Depth_for_Nitrate_isotopes colorBarMaximum double 8000.0
attribute Depth_for_Nitrate_isotopes colorBarMinimum double -8000.0
attribute Depth_for_Nitrate_isotopes colorBarPalette String TopographyDepth
attribute Depth_for_Nitrate_isotopes description String Depth of sample for nitrate isotope measurements
attribute Depth_for_Nitrate_isotopes long_name String Depth
attribute Depth_for_Nitrate_isotopes standard_name String depth
attribute Depth_for_Nitrate_isotopes units String meters below seafloor (mbsf)
variable d15N_Nitrate   float  
attribute d15N_Nitrate _FillValue float NaN
attribute d15N_Nitrate actual_range float 3.86, 49.3
attribute d15N_Nitrate bcodmo_name String dN15_NO3
attribute d15N_Nitrate colorBarMaximum double 50.0
attribute d15N_Nitrate colorBarMinimum double 0.0
attribute d15N_Nitrate description String d15N nitrate
attribute d15N_Nitrate long_name String Mole Concentration Of Nitrate In Sea Water
attribute d15N_Nitrate units String per mil (‰)
variable d18O_Nitrate   float  
attribute d18O_Nitrate _FillValue float NaN
attribute d18O_Nitrate actual_range float 2.48, 34.7
attribute d18O_Nitrate bcodmo_name String d18O_NO3
attribute d18O_Nitrate colorBarMaximum double 50.0
attribute d18O_Nitrate colorBarMinimum double 0.0
attribute d18O_Nitrate description String d18O nitrate
attribute d18O_Nitrate long_name String Mole Concentration Of Nitrate In Sea Water
attribute d18O_Nitrate units String per mil (‰)
variable Depth_for_Ammonium   double  
attribute Depth_for_Ammonium _FillValue double NaN
attribute Depth_for_Ammonium actual_range double 0.02, 28.48
attribute Depth_for_Ammonium bcodmo_name String depth_bsf
attribute Depth_for_Ammonium colorBarMaximum double 8000.0
attribute Depth_for_Ammonium colorBarMinimum double -8000.0
attribute Depth_for_Ammonium colorBarPalette String TopographyDepth
attribute Depth_for_Ammonium description String Depth of sample for ammonium measurements
attribute Depth_for_Ammonium long_name String Depth
attribute Depth_for_Ammonium standard_name String depth
attribute Depth_for_Ammonium units String meters below seafloor (mbsf)
variable Ammonium   float  
attribute Ammonium _FillValue float NaN
attribute Ammonium actual_range float 0.5, 3.2
attribute Ammonium bcodmo_name String Ammonium
attribute Ammonium colorBarMaximum double 5.0
attribute Ammonium colorBarMinimum double 0.0
attribute Ammonium description String Ammonium concentration
attribute Ammonium long_name String Mole Concentration Of Ammonium In Sea Water
attribute Ammonium nerc_identifier String https://vocab.nerc.ac.uk/collection/P01/current/AMONAAZX/ (external link)
attribute Ammonium units String micromolar (uM)

The information in the table above is also available in other file formats (.csv, .htmlTable, .itx, .json, .jsonlCSV1, .jsonlCSV, .jsonlKVP, .mat, .nc, .nccsv, .tsv, .xhtml) via a RESTful web service.

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