| Chemical data associated with field collections from the Gulf of Maine, Nauset Marsh Estuary System, and Long Island Sound (Alexandrium isotopes project) | Stable isotope value; d18O - NO3
| d18O_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 | delta 18O of nitrate
| d18O_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 d18O_NO3
| d18O_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 18O of nitrate; expressed in permille notation in reference to VSMOW (vienna standard mean ocean water)
| del18O_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 18O of nitrate; 1 standard deviation expressed in permille notation in reference to VSMOW (vienna standard mean ocean water)
| del18O_NO3_sd |
| Aerosol Nitrate (NO3) from samples collected on the US GEOTRACES Arctic cruise (HLY1502) from August to October 2015 | delta 18O of aerosol nitrate
| NITRATE_18_16_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 18O of nitrate
| NITRATE_18_16_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 18O of nitrate
| NITRATE_18_16_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 18O of nitrate
| NITRATE_18_16_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 d18O in per mil versus VSMOW
| NITRATE_18_16_D_DELTA_BOTTLE_no8ude |
| 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_18_16_D_DELTA_BOTTLE_no8ude
| SD1_NITRATE_18_16_D_DELTA_BOTTLE_no8ude |
| 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 d18O in per mil versus VSMOW
| NITRATE_18_16_D_DELTA_BOTTLE_dksgvb |
| 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_18_16_D_DELTA_BOTTLE_dksgvb
| SD1_NITRATE_18_16_D_DELTA_BOTTLE_dksgvb |
| 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 18O of aerosol nitrate
| NO3_18_16_A_SML_DELTA_HIVOL |
| 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) | Oxygen isotopic composition (18O/16O) of nitrate relative to SMOW (Vienna Standard Mean Ocean Water)
| d18O_NO3 |
| Water column nitrate+nitrite d15N and d18O from samples collected during R/V Pelican and R/V F.G. Walton Smith cruises in the Gulf of Mexico and Florida Straits between 2011 and 2018 | Oxygen isotopic composition of nitrate+nitrite in a sample
| NO3_NO2_d18O |
| 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_180_NO3
| d180_NO3 |
| Nutrient and nitrate isotope data from the southern Benguela upwelling system from February to August 2017 | 18O_NO3
| O18_NO3 |
| Nutrient and nitrate isotope data from the southern Benguela upwelling system from February to August 2017 | standard deviation of δ18O
| O18_stdev |
| Isotope data from USCGC Healy cruise HLY1202 from the Arctic, North of Alaska in 2012 (OA - Canada Basin project) | Ratio of Oxygen-18 to Oxygen-16 as compared to VSMOW standard in per mil (parts per thousand).
| d18O |
| N and O isotope effects of nitrate reduction by 3 forms of nitrate reductase (15N2 Contamination project) | delta-O18 of nitrate, reported as an average of replicate measurements.
| d18O |
| 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 | d18O of nitrate
| d18O_NO3 |
| 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 | delta18O of nitrate, first replicate analysis of the same sample
| d18O_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 | delta18O of nitrate, second replicate analysis of the same sample
| d18O_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 | delta18O of nitrate, third replicate analysis of the same sample
| d18O_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) | d18O-NO3 = ([18O]/[16O]NO3 / [18O]/[16O]standard -1) x 1000‰; referenced to VSMOW
| d18O_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) | oxygen isotopic composition (delta O18: 18O/16O) of nitrate
| d18O_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 | d18O nitrate
| d18O_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 oxygen isotope ratio
| NO3_d18O |
| 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 O18:O16 used to differentiate Nitrate from different sources
| NO3d180 |
| Tropical Pacific nitrate N and O isotopes in the tropical Pacific from 2003-2007 (CAREER project, Diatom-bound_N_Isotopes project) | nitrate d18O
| nitrate_d18O |
| 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 18O of NO3. d18O (‰ vs. VSMOW) is the oxygen isotopic composition of a sample expressed in delta notation (in units of per mil) relative to Vienna Standard Mean Ocean Water (VSMOW), where delta 18O = {[ (18O/16O)sample / (18O/16O)VSMOW ] – 1} × 1000.
| d18O_NO3_mean |
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