BCO-DMO ERDDAP
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Row Type Variable Name Attribute Name Data Type Value
attribute NC_GLOBAL access_formats String .htmlTable,.csv,.json,.mat,.nc,.tsv
attribute NC_GLOBAL acquisition_description String Sampling and analytical procedures:\n \nThe concentration of total nitrogen (TN) for samples was determined by\npersulfate oxidation (Solorzano and Sharp, 1980) with adaptations (Knapp et\nal., 2005), and the resulting NO3- was measured by chemiluminescence (Braman\nand Hendrix, 1989). DON concentration was determined by subtracting the\nconcentrations of PNsusp, NH4+, and NO3-+NO2- (reported in Berthelot et al.,\n2015, Biogeosciences) from the measured TN concentration of each sample with a\npropagated error of +/- 0.5 \\u03bcM. The d15N of the resulting NO3- was\nmeasured using the denitrifier method (Casciotti et al., 2002; McIlvin and\nCasciotti, 2011; Sigman et al., 2001).\n \nThe d15N of PNsink was measured using a Thermo Scientific Flash 2000 Elemental\nAnalyzer coupled with a Delta Plus Thermo Scientific mass spectrometer.\n \nThe average standard deviation for individual DON concentration measurements\nwas +/- 0.3 \\u00b5M. DON concentration was determined by subtracting the\nconcentrations of PNsusp, NH4+, and NO3-+NO2- (reported in Berthelot et al.,\n2015, Biogeosciences) from the measured TN concentration of each sample with a\npropagated error of +/- 0.5 \\u03bcM.\n \nThe d15N of TN was determined via persulfate oxidation of TN to NO3- (Knapp et\nal., 2005) and subsequent analysis of NO3- d15N by the denitrifier method,\nwith a propagated error for DON d15N calculated using a Monte Carlo method\n(Press et al., 1992) of +/- 0.6\\u2030. Samples were calibrated with IAEA N3\nand USGS 34 NO3- d15N isotopic reference materials as described in McIlvin and\nCasciotti, 2011.\n \nThe d15N of PNsink was measured using a Thermo Scientific Flash 2000 Elemental\nAnalyzer coupled  \n with a Delta Plus Thermo Scientific mass spectrometer. The average standard\ndeviation for standards was +/- 0.06\\u2030.
attribute NC_GLOBAL awards_0_award_nid String 710561
attribute NC_GLOBAL awards_0_award_number String OCE-1537314
attribute NC_GLOBAL awards_0_data_url String http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=1537314 (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 Henrietta N Edmonds
attribute NC_GLOBAL awards_0_program_manager_nid String 51517
attribute NC_GLOBAL cdm_data_type String Other
attribute NC_GLOBAL comment String VAHINE nitrogen \n  PI: Angela Knapp \n  Data version 1: 2018-07-10
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 2018-07-10T19:07:01Z
attribute NC_GLOBAL date_modified String 2018-07-12T18:56:18Z
attribute NC_GLOBAL defaultDataQuery String &time<now
attribute NC_GLOBAL doi String 10.1575/1912/bco-dmo.739646.1
attribute NC_GLOBAL infoUrl String https://www.bco-dmo.org/dataset/739646 (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 DON d15N was measured on a Thermo Delta V isotope ratio mass spectrometer.
attribute NC_GLOBAL instruments_0_dataset_instrument_nid String 739696
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 Thermo Delta V isotope ratio mass spectrometer
attribute NC_GLOBAL instruments_1_dataset_instrument_description String DON concentration was measured on a Thermo Scientific 42i chemiluminescent NOx box.
attribute NC_GLOBAL instruments_1_dataset_instrument_nid String 739695
attribute NC_GLOBAL instruments_1_description String The chemiluminescence method for gas analysis of oxides of nitrogen relies on the measurement of light produced by the gas-phase titration of nitric oxide and ozone. A chemiluminescence analyzer can measure the concentration of NO/NO2/NOX.\n\nOne example is the Teledyne Model T200: http://www.teledyne-api.com/products/T200.asp
attribute NC_GLOBAL instruments_1_instrument_name String Chemiluminescence NOx Analyzer
attribute NC_GLOBAL instruments_1_instrument_nid String 542895
attribute NC_GLOBAL instruments_1_supplied_name String Thermo Scientific 42i chemiluminescent NOx
attribute NC_GLOBAL instruments_2_dataset_instrument_description String The d15N of PNsink was measured using a Thermo Scientific Flash 2000 Elemental Analyzer coupled with a Delta Plus Thermo Scientific mass spectrometer.
attribute NC_GLOBAL instruments_2_dataset_instrument_nid String 739697
attribute NC_GLOBAL instruments_2_description String Instruments that quantify carbon, nitrogen and sometimes other elements by combusting the sample at very high temperature and assaying the resulting gaseous oxides. Usually used for samples including organic material.
attribute NC_GLOBAL instruments_2_instrument_external_identifier String https://vocab.nerc.ac.uk/collection/L05/current/LAB01/ (external link)
attribute NC_GLOBAL instruments_2_instrument_name String Elemental Analyzer
attribute NC_GLOBAL instruments_2_instrument_nid String 546339
attribute NC_GLOBAL instruments_2_supplied_name String Thermo Scientific Flash 2000 Elemental Analyzer
attribute NC_GLOBAL keywords String bco, bco-dmo, biological, chemical, d15, data, dataset, date, dmo, don, dond15, erddap, M1_d15NPNsink, M1_DON, M1_DONd15N, M2_d15NPNsink, M2_DON, M2_DONd15N, M3_d15NPNsink, M3_DON, M3_DONd15N, management, npnsink, oceanography, office, preliminary, sampling, time
attribute NC_GLOBAL license String https://www.bco-dmo.org/dataset/739646/license (external link)
attribute NC_GLOBAL metadata_source String https://www.bco-dmo.org/api/dataset/739646 (external link)
attribute NC_GLOBAL param_mapping String {'739646': {}}
attribute NC_GLOBAL parameter_source String https://www.bco-dmo.org/mapserver/dataset/739646/parameters (external link)
attribute NC_GLOBAL people_0_affiliation String Florida State University
attribute NC_GLOBAL people_0_affiliation_acronym String FSU
attribute NC_GLOBAL people_0_person_name String Angela N. Knapp
attribute NC_GLOBAL people_0_person_nid String 555499
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 Florida State University
attribute NC_GLOBAL people_1_affiliation_acronym String FSU
attribute NC_GLOBAL people_1_person_name String Angela N. Knapp
attribute NC_GLOBAL people_1_person_nid String 555499
attribute NC_GLOBAL people_1_role String Contact
attribute NC_GLOBAL people_1_role_type String related
attribute NC_GLOBAL people_2_affiliation String Woods Hole Oceanographic Institution
attribute NC_GLOBAL people_2_affiliation_acronym String WHOI BCO-DMO
attribute NC_GLOBAL people_2_person_name String Amber York
attribute NC_GLOBAL people_2_person_nid String 643627
attribute NC_GLOBAL people_2_role String BCO-DMO Data Manager
attribute NC_GLOBAL people_2_role_type String related
attribute NC_GLOBAL project String SW Pac N2 fixation
attribute NC_GLOBAL projects_0_acronym String SW Pac N2 fixation
attribute NC_GLOBAL projects_0_description String NSF Award Abstract:\nThe availability of nitrogen in the surface ocean plays a critical role regulating rates of primary productivity in the ocean, and thus through modification of the carbon cycle, nitrogen has the capacity to influence climate. The dominant source of biologically available nitrogen to the ocean is through a process known as di-nitrogen (N2) fixation, which involves the reduction of N2 gas dissolved in seawater to ammonium by microbes referred to as diazotrophs. While significant progress has been made identifying a diversity of marine diazotrophs in recent years using molecular tools, quantifying global rates of N2 fixation, and identifying which ocean basin supports the highest fluxes, has remained a vexing question. This research will quantify rates of N2 fixation as well as its importance for supporting production in the southwest Pacific Ocean. Results from this research will shed light on the sensitivities of N2 fixation (temperature, iron concentrations) as well as the extent of spatial and temporal coupling of nitrogen sources and sinks in the ocean. The work will be carried out by an early career scientist, and involve mentoring of young women, middle school girls and minorities, training of undergraduate and graduate researchers, and international collaborations.\nIdentifying the spatial distribution of the largest di-nitrogen (N2) fixation fluxes to the ocean remains a critical goal of chemical oceanography. The spatial distribution can inform our understanding of the environmental sensitivities of N2 fixation and the capacity for the dominant marine nitrogen (N) source and sink processes to respond to each other and thus influence the global carbon cycle and climate. In addition to temperature, two factors are at the heart of the current debate over what influences the spatial distribution of N2 fixation in the ocean: 1) the presence of adequate iron to meet the needs of N2 fixing microbes, and, 2) the absolute concentrations as well as ratios of surface ocean nitrate and phosphate concentrations that are low relative to the \"Redfield\" ratio, which are thought to favor N2 fixing microbes. This project will test the effects of gradients in atmospheric dust deposition on N2 fixation rates when surface waters have relatively constant but favorable nitrate to phosphate concentrations. The work will be carried out in the southwest Pacific, a region highlighted by new modeling work for its unique geochemical characteristics that are expected to favor significant N2 fixation fluxes. Nitrate+nitrite d15N as well as total dissolved nitrogen (TDN) concentration and d15N will be measured in water column samples collected on a French cruise and sediment traps were deployed to capture the sinking particulate N flux. The results will be compared with published work to evaluate which ocean regions support the largest N2 fixation fluxes.\nMore information:\nThis project was part of the Oligotrophy to UlTra-oligotrophy PACific Experiment (OUTPACE) cruise in the Southwest Pacific between New Caledonia (166°28' E; 22°14' S) and Tahiti (149°36' W; 17°34' S) 0-2000 m​\n* OUTPACE cruise (doi: https://dx.doi.org/10.17600/15000900)\n* OUTPACE website: https://outpace.mio.univ-amu.fr/?lang=en
attribute NC_GLOBAL projects_0_end_date String 2018-07
attribute NC_GLOBAL projects_0_geolocation String Southwest Pacific Ocean between New Caledonia and Tahiti along ~18 deg S
attribute NC_GLOBAL projects_0_name String Quantifying nitrogen fixation along unique geochemical gradients in the southwest Pacific Ocean
attribute NC_GLOBAL projects_0_project_nid String 710562
attribute NC_GLOBAL projects_0_project_website String http://scope.soest.hawaii.edu/data/lava/lava.html (external link)
attribute NC_GLOBAL projects_0_start_date String 2015-08
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 standard_name_vocabulary String CF Standard Name Table v55
attribute NC_GLOBAL summary String This dataset includes water column dissolved organic nitrogen (DON) concentration and d15N data, as well as sinking particulate nitrogen d15N (\\u201cPNsink d15N\\u201d) data. These samples were collected inside triplicate (\\u201cM1\\u201d, \\u201cM2\\u201d, and \\u201cM3\\u201d) large volume (i.e., 2.3 m diameter, 15 m deep) mesocosm experiments deployed in a lagoon off of Noumea, New Caledonia. DON samples were collected at 6 m depth daily by a Teflon pump and PVC tubing. PNsink d15N samples were collected daily by SCUBA divers who removed a screw-top plastic bottle from the bottom of the plastic mesocosm. \\u201cSwimmers\\u201d were removed from the PNsink d15N samples prior to analysis.\\r\\n\\r\\nThese measurements were made as part of project \\VAriability of vertical and tropHIc transfer of diazotroph derived N in the south wEst Pacific\\ (VAHINE) to study the fate of fixed nitrogen in the oceanic pelagic food web and its potential impact on carbon export. The field campaign of VAHINE took place in the South West Pacific (New Caledonia) in January and February of 2013 and involved 16 scientists from France, Israel, Germany and the USA.
attribute NC_GLOBAL title String [VAHINE nitrogen] - Dissolved and sinking particulate organic nitrogen data from a large volume mesocosm experiment in the Noumea Lagoon, New Caledonia, measured from January to February 2013 (Quantifying nitrogen fixation along unique geochemical gradients in the southwest Pacific Ocean)
attribute NC_GLOBAL version String 1
attribute NC_GLOBAL xml_source String osprey2erddap.update_xml() v1.3
variable Sampling_Date String
attribute Sampling_Date bcodmo_name String date
attribute Sampling_Date description String Sample date in format \"dd-mmm-yyyy\"
attribute Sampling_Date long_name String Sampling Date
attribute Sampling_Date nerc_identifier String https://vocab.nerc.ac.uk/collection/P01/current/ADATAA01/ (external link)
attribute Sampling_Date source_name String Sampling_Date
attribute Sampling_Date time_precision String 1970-01-01
attribute Sampling_Date units String unitless
variable M1_DON float
attribute M1_DON _FillValue float NaN
attribute M1_DON actual_range float 5.1, 5.9
attribute M1_DON bcodmo_name String Dissolved Organic Nitrogen
attribute M1_DON description String Dissolved organic nitrogen (replicate \"M1\")
attribute M1_DON long_name String M1 DON
attribute M1_DON units String micromolar (uM)
variable M1_DONd15N float
attribute M1_DONd15N _FillValue float NaN
attribute M1_DONd15N actual_range float 3.2, 6.0
attribute M1_DONd15N bcodmo_name String N
attribute M1_DONd15N description String Dissolved organic nitrogen isotopic composition (replicate \"M1\")
attribute M1_DONd15N long_name String M1 DONd15 N
attribute M1_DONd15N units String per mil (0/00)
variable M2_DON float
attribute M2_DON _FillValue float NaN
attribute M2_DON actual_range float 3.6, 7.0
attribute M2_DON bcodmo_name String Dissolved Organic Nitrogen
attribute M2_DON description String Dissolved organic nitrogen (replicate \"M2\")
attribute M2_DON long_name String M2 DON
attribute M2_DON units String micromolar (uM)
variable M2_DONd15N float
attribute M2_DONd15N _FillValue float NaN
attribute M2_DONd15N actual_range float 4.1, 5.1
attribute M2_DONd15N bcodmo_name String N
attribute M2_DONd15N description String Dissolved organic nitrogen isotopic composition (replicate \"M2\")
attribute M2_DONd15N long_name String M2 DONd15 N
attribute M2_DONd15N units String per mil (0/00)
variable M3_DON float
attribute M3_DON _FillValue float NaN
attribute M3_DON actual_range float 4.9, 6.5
attribute M3_DON bcodmo_name String Dissolved Organic Nitrogen
attribute M3_DON description String Dissolved organic nitrogen (replicate \"M3\")
attribute M3_DON long_name String M3 DON
attribute M3_DON units String micromolar (uM)
variable M3_DONd15N float
attribute M3_DONd15N _FillValue float NaN
attribute M3_DONd15N actual_range float 4.0, 6.7
attribute M3_DONd15N bcodmo_name String N
attribute M3_DONd15N description String Dissolved organic nitrogen isotopic composition (replicate \"M3\")
attribute M3_DONd15N long_name String M3 DONd15 N
attribute M3_DONd15N units String per mil (0/00)
variable M1_d15NPNsink float
attribute M1_d15NPNsink _FillValue float NaN
attribute M1_d15NPNsink actual_range float 0.2, 5.8
attribute M1_d15NPNsink bcodmo_name String N
attribute M1_d15NPNsink description String Sinking particulate nitrogen isotopic composition (replicate \"M1\")
attribute M1_d15NPNsink long_name String M1 D15 NPNsink
attribute M1_d15NPNsink units String per mil (0/00)
variable M2_d15NPNsink float
attribute M2_d15NPNsink _FillValue float NaN
attribute M2_d15NPNsink actual_range float 0.1, 4.5
attribute M2_d15NPNsink bcodmo_name String N
attribute M2_d15NPNsink description String Sinking particulate nitrogen isotopic composition (replicate \"M2\")
attribute M2_d15NPNsink long_name String M2 D15 NPNsink
attribute M2_d15NPNsink units String per mil (0/00)
variable M3_d15NPNsink float
attribute M3_d15NPNsink _FillValue float NaN
attribute M3_d15NPNsink actual_range float 0.6, 6.4
attribute M3_d15NPNsink bcodmo_name String N
attribute M3_d15NPNsink description String Sinking particulate nitrogen isotopic composition (replicate \"M3\")
attribute M3_d15NPNsink long_name String M3 D15 NPNsink
attribute M3_d15NPNsink units String per mil (0/00)

 
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