| Results from experiment examining 15N-labeled contaminants in commercial 15N2 gas: Detected 15N-labeled nitrate (NO3) in commercial 15N2 gas (15N2 Contamination project) | delta 15N NO3.
| delta_15N_NO3 |
| Measurements of dissolved organic nitrogen concentration and d15N from R/V Atlantis and R/V Melville cruises in the Eastern Tropical South Pacific from 2010 to 2011. | No3- + NO2- d15N values
| NO3_NO2_d15N |
| 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 | delta 15N of nitrate
| d15N_NO3 |
| 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 | standard deviation of d15N_NO3
| d15N_NO3_sd |
| Nitrate (NO3-) and Nitrite (NO2-) d15N and d18O from R/V Atlantis cruise AT15-61 in Jan-Feb 2010 and R/V Melville cruise MV1104 in Mar-Apr 2011 in the Eastern Tropical South Pacific (ETSP) | Delta 15N of nitrate; expressed in permille notation in reference to atmospheric N2
| del15N_NO3 |
| Nitrate (NO3-) and Nitrite (NO2-) d15N and d18O from R/V Atlantis cruise AT15-61 in Jan-Feb 2010 and R/V Melville cruise MV1104 in Mar-Apr 2011 in the Eastern Tropical South Pacific (ETSP) | Delta 15N of nitrate; 1 standard deviation expressed in permille notation in reference to atmospheric N2
| del15N_NO3_sd |
| Estimated nitrate d15N modeled using an ensemble of artificial neural networks (EANNs) | modeled nitrate d15N
| d15N |
| Estimated nitrate d15N modeled using an ensemble of artificial neural networks (EANNs) | standard deviation
| d15N_stdev |
| Compiled dataset consisting of published and unpublished global nitrate d15N measurements from from 1975-2018 | The N isotopic composition of nitrate
| nitrate_d15N |
| Aerosol Nitrate (NO3) from samples collected on the US GEOTRACES Arctic cruise (HLY1502) from August to October 2015 | delta 15N of aerosol nitrate
| NITRATE_15_14_A_SML_DELTA_HIVOL |
| Nitrate (NO3), ammonium (NH4), and oxygen & deuterium isotopic composition from sea ice hole water sampling on the US GEOTRACES Arctic cruise (HLY1502) from August to October 2015 | delta 15N of nitrate
| NITRATE_15_14_D_DELTA_PUMP |
| Nitrate (NO3), ammonium (NH4), and oxygen & deuterium isotopic composition from sea ice collected on the US GEOTRACES Arctic cruise (HLY1502) from August to October 2015 | delta 15N of nitrate
| NITRATE_15_14_D_DELTA_ICORE |
| Nitrate (NO3), ammonium (NH4), and oxygen & deuterium isotopic composition from snow collected on the US GEOTRACES Arctic cruise (HLY1502) from August to October 2015 | delta 15N of nitrate
| NITRATE_15_14_D_DELTA _SNOW |
| Nitrate d15N and d18O from Niskin bottle samples collected on Leg 1 (Seattle, WA to Hilo, HI) of the US GEOTRACES Pacific Meridional Transect (PMT) cruise (GP15, RR1814) on R/V Roger Revelle from September to October 2018 | Nitrate d15N in per mil versus air
| NITRATE_15_14_D_DELTA_BOTTLE_lnw6zq |
| Nitrate d15N and d18O from Niskin bottle samples collected on Leg 1 (Seattle, WA to Hilo, HI) of the US GEOTRACES Pacific Meridional Transect (PMT) cruise (GP15, RR1814) on R/V Roger Revelle from September to October 2018 | Standard deviation of NITRATE_15_14_D_DELTA_BOTTLE_lnw6zq
| SD1_NITRATE_15_14_D_DELTA_BOTTLE_lnw6zq |
| Nitrate d15N and d18O from Niskin bottle samples collected on Leg 2 (Hilo, HI to Papeete, French Polynesia) of the US GEOTRACES Pacific Meridional Transect (PMT) cruise (GP15, RR1815) on R/V Roger Revelle from October to November 2018 | Nitrate d15N in per mil versus air
| NITRATE_15_14_D_DELTA_BOTTLE_w2kmnp |
| Nitrate d15N and d18O from Niskin bottle samples collected on Leg 2 (Hilo, HI to Papeete, French Polynesia) of the US GEOTRACES Pacific Meridional Transect (PMT) cruise (GP15, RR1815) on R/V Roger Revelle from October to November 2018 | Standard deviation of NITRATE_15_14_D_DELTA_BOTTLE_w2kmnp
| SD1_NITRATE_15_14_D_DELTA_BOTTLE_w2kmnp |
| Nitrate isotope data from R/V Thomas G. Thompson cruise TN303 in the Eastern Tropical Pacific in 2013 (U.S. GEOTRACES EPZT project) | Average nitrate delta 15N, reported in units of permil vs. atmospheric N2.
| NO3_15_D_DELTA_BOTTLE |
| Nitrate (NO3) aerosol isotopes from the U.S. GEOTRACES EPZT cruise TN303 on R/V Thomas G. Thompson in the Eastern Tropical Pacific from October to December 2013 | delta 15N of aerosol nitrate
| NO3_15_14_A_SML_DELTA_HIVOL |
| delta 15N of nitrate from R/V Knorr cruise KN199-04 & KN204-01 in the Subtropical northern Atlantic Ocean from 2010-2011 (U.S. GEOTRACES NAT project) | Nitrate delta 15N, reported in units of permil vs. atmospheric N2.
| d15N_NO3 |
| Nitrogen and Oxygen isotope ratios of dissolved nitrate from R/V Knorr KN199-04, KN204-01 in the Subtropical northern Atlantic Ocean from 2010-2011 (U.S. GEOTRACES NAT project) | Nitrogen isotopic composition (15N/14N) of nitrate relative to atmospheric N2
| d15N_NO3 |
| Nitrate nitrogen and oxygen isotope hydrocast data from R/V Aurora Australis and RV Nathaniel B. Palmer cruises in the Southern oceans from 1997 to 2006 (CAREER project) | delta 15N of dissolved nitrate relative to atmospheric N2
| dN15_NO3 |
| Nutrient and nitrate isotope data from the southern Benguela upwelling system from February to August 2017 | 15N_NO3
| N15_NO3 |
| N and O isotope effects of nitrate reduction by 3 forms of nitrate reductase (15N2 Contamination project) | delta-N15 of nitrate, reported as an average of replicate measurements.
| d15N |
| Vertical profiles of N2 gas concentrations in excess of equilibrium values along with the isotopic composition of total N2, NO3- and NO2- from R/V New Horizon cruise NH1410 in the Eastern Tropical North Pacific from May to June 2014 | d15N of nitrate
| d15NO3 |
| Natural abundance N2O isotopomers measured from seawater samples collected in the Eastern Tropical North Pacific during R/V Sally Ride (SR1805) cruise from March to April 2018 | delta15N of nitrate, first replicate analysis of the same sample
| d15N_NO3_meas1 |
| Natural abundance N2O isotopomers measured from seawater samples collected in the Eastern Tropical North Pacific during R/V Sally Ride (SR1805) cruise from March to April 2018 | delta15N of nitrate, second replicate analysis of the same sample
| d15N_NO3_meas2 |
| Natural abundance N2O isotopomers measured from seawater samples collected in the Eastern Tropical North Pacific during R/V Sally Ride (SR1805) cruise from March to April 2018 | delta15N of nitrate, third replicate analysis of the same sample
| d15N_NO3_meas3 |
| Nitrate dual isotope (d15N and d18O) measurements from R/V Knorr cruise KN192-05 in the South Atlantic subtropical gyre and Benguela upwelling region in 2007 (CoFeMUG project) | d15N-NO3 = ([15N]/[14N]NO3 / [15N]/[14N]standard -1) x 1000‰; referenced to atmospheric N2.
| d15N_NO3 |
| Seawater and filter sample nitrogen and carbon isotopes from coastal and off-shore sites from multiple cruises in the coastal Washington, 2009-2012 (Regenerated Nitrogen project) | nitrogen isotopic composition (delta 15N:N14) of nitrate
| dN15_NO3 |
| 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 | d15N nitrate
| d15N_Nitrate |
| Flow through sediment core incubations for nitrogen concentration and isotopic fluxes collected in 2013 on the Island of Sylt, Germany in the North Sea. | Nitrate nitrogen isotope ratio
| NO3_d15N |
| Nitrate and Oxygen isotope measurements from CLIVAR line P16S in 2005 from R/V Roger Revelle ZHNG02RR in the A meridional transect from 16 to 71 degrees South along 150 degrees West from January to February 2005 (CAREER project) | ratio of stable isotopes 15N:14N used to differentiate Nitrate from different sources
| NO3d15N |
| Planktic foraminifer tissue and shell d15N from net tows on R/V S.A. Agulhas II cruises VOY016 and VOY019 in the Southern Ocean south of Africa during 2015-2016 | Average d15N. d15N is the nitrogen isotopic composition of a sample (nitrate only) expressed in delta notation (d15N in units of per mil, ‰) relative to atmospheric N2, where d15N = {[(15N/14N)sample/(15N/14N)atmN2] – 1} × 1000
| d15N_avg_nitrate |
| Nitrate+nitrite and nitrate-only d15N from R/V S.A. Agulhas II cruises VOY016 and VOY019 in the Southern Ocean south of Africa during 2015-2016 | Average d15N. d15N is the nitrogen isotopic composition of a sample (nitrate only) expressed in delta notation (d15N in units of per mil, ‰) relative to atmospheric N2, where d15N = {[(15N/14N)sample/(15N/14N)atmN2] – 1} × 1000
| d15N_avg_nitrate |
| Nitrate+nitrite and nitrate-only d15N from R/V S.A. Agulhas II cruises VOY016 and VOY019 in the Southern Ocean south of Africa during 2015-2016 | Standard deviation of d15N (nitrate only)
| d15N_stdev_nitrate |
| Tropical Pacific nitrate N and O isotopes in the tropical Pacific from 2003-2007 (CAREER project, Diatom-bound_N_Isotopes project) | nitrate d15N
| nitrate_d15N |
| Nitrate nitrogen and oxygen isotope data from the underway acquisition system from R/V Aurora Australis and R/V Southern Surveyor cruises in the Southern Ocean from 1997 to 1999 (CAREER project) | delta 15N of dissolved nitrate relative to atmospheric N2
| d15N_NO3 |
| Wintertime nitrate delta 15N and delta 18O from hydrocasts from R/V S. A. Agulhas II cruise VOY03 in the Southern Ocean south of Africa in 2012 (Diatom-bound_N_Isotopes project) | delta 15N of NO3. d15N (‰ vs. AIR) is the nitrogen isotopic composition of a sample expressed in delta notation (in units of per mil) relative to atmospheric N2, where delta 15N = {[ (15N/14N)sample / (15N/14N)atmN2 ] – 1} × 1000.
| d15N_NO3_mean |
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