http://lod.bco-dmo.org/id/dataset/986627
eng; USA
utf8
dataset
Highest level of data collection, from a common set of sensors or instrumentation, usually within the same research project
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
2025-10-13
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
Total dissolved nitrogen (TDN) concentrations and δ15N measurements from samples collected on R/V Nathaniel B. Palmer GO-SHIP cruises NBP1706 and NBP1707 in the South Pacific from Jul 3 to Sep 30, 2017
2025-11-25
publication
2025-11-25
revision
Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)
2025-11-25
publication
https://doi.org/10.26008/1912/bco-dmo.986627.1
Angela N. Knapp
Florida State University
principalInvestigator
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
publisher
Cite this dataset as: Knapp, A. N., Liang, Z. (2025) Total dissolved nitrogen (TDN) concentrations and δ15N measurements from samples collected on R/V Nathaniel B. Palmer GO-SHIP cruises NBP1706 and NBP1707 in the South Pacific from Jul 3 to Sep 30, 2017. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2025-11-25 [if applicable, indicate subset used]. doi:10.26008/1912/bco-dmo.986627.1 [access date]
2017 GO-SHIP P06 transect TDN d15N Dataset Description: Methods and Sampling: <p>Total dissolved nitrogen (TDN) samples were collected from Niskin bottles deployed on a CTD rosette. All samples were filtered through a PES filter with 0.2 µm nominal pore size and frozen at -20 ˚C until analysis in the lab at Florida State University. We used the persulfate oxidation approach adapted from Knapp et al., 2005 to convert all TDN to nitrate, and the resulting nitrate concentration was determined using a chemiluminescent method, which quantitatively reduces NO<sub>3</sub><sup>-</sup>+NO<sub>2</sub><sup>-</sup> to NO gas in a heated, acidic vanadium (III) solution (Braman &amp; Hendrix, 1989). DON concentrations were computed by the difference between TDN and NO<sub>3</sub><sup>-</sup>+NO<sub>2</sub><sup>-</sup> concentrations, with NO<sub>3</sub><sup>-</sup>+NO<sub>2</sub><sup>-</sup> concentrations measured at sea using colorimetric methods (Armstrong et al., 1967) and reported at CCHDO Hydrographic Data Office (2023).</p>
<p>After TDN concentration analysis, each TDN sample was acidified to a pH = ~4, and the TDN δ<sup>15</sup>N was measured by the “denitrifier” method (Sigman et al., 2001; Casciotti et al., 2002; McIlvin &amp; Casciotti, 2011; Weigand et al., 2016). In samples with measurable NO<sub>3</sub><sup>-</sup>+NO<sub>2</sub><sup>-</sup> concentration, the δ<sup>15</sup>N of DON can be calculated by mass balance by subtracting the concentration and δ<sup>15</sup>N of NO<sub>3</sub><sup>-</sup>+NO<sub>2</sub><sup>-</sup> from the TDN concentration and TDN δ<sup>15</sup>N measurements (Knapp et al., 2005).</p>
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1829797 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1829797
completed
Angela N. Knapp
Florida State University
(979) 862-5235
797 Lamar St. Dept of Oceanography, Eller O&M Room 1204
College Station
TX
77843
USA
aknapp@tamu.edu
pointOfContact
asNeeded
Dataset Version: 1
Unknown
EXPOCODE
SECT_ID
STNNBR
CASTNO
Niskin_bottle_number
DATE
LATITUDE
LONGITUDE
CTDPRS
CTDSAL
CTDTMP
NITRAT_plus_NITRIT
TDN
TDN_d15N
Thermo 42i chemiluminescent NOx box
CTD
Niskin bottles
Thermo Delta V Advantage Isotope Ratio Mass Spectrometer
theme
None, User defined
EXPOCODE
region
station
cast
bottle
date
latitude
longitude
water pressure
salinity from CTD
water temperature at measurement depth
nitrate plus nitrite
Total Dissolved Nitrogen
d15N
featureType
BCO-DMO Standard Parameters
Chemiluminescence NOx Analyzer
CTD Sea-Bird SBE 911plus
Niskin bottle
Thermo Fisher Scientific DELTA V Advantage isotope ratio mass spectrometer
instrument
BCO-DMO Standard Instruments
NBP1706
NBP1707
service
Deployment Activity
South Pacific Ocean
place
Locations
otherRestrictions
otherRestrictions
Access Constraints: none. Use Constraints: Please follow guidelines at: http://www.bco-dmo.org/terms-use Distribution liability: Under no circumstances shall BCO-DMO be liable for any direct, incidental, special, consequential, indirect, or punitive damages that result from the use of, or the inability to use, the materials in this data submission. If you are dissatisfied with any materials in this data submission your sole and exclusive remedy is to discontinue use.
Collaborative Research: Dissolved organic phosphorus controls on marine nitrogen fixation and export production
https://osprey.bco-dmo.org/project/820043
Collaborative Research: Dissolved organic phosphorus controls on marine nitrogen fixation and export production
<p>This study was global in nature, but included significant numbers of analyses from: GO-SHIP cruises (P06-2017, P18-2016, I08S-2016, I09N-2016); Eastern Tropical South Pacific; Atlantic, Pacific, and Indian Ocean sectors of the Southern Ocean; Gulf of Alaska; and the western Pacific.</p>
<p><em>NSF Award Abstract:</em><br />
Phytoplankton play an important role in the Earth's elemental cycles of carbon and nitrogen. In addition to sunlight, phytoplankton living in the surface waters of the oceans require the elements nitrogen and phosphorus for growth. Much of these nutrients are supplied in their inorganic forms from mixing of deep waters towards the surface during the winter months when vertical stability of the water column breaks down. However much of the low latitude oceans, 45degS45degN, suffer from limited nutrient input to sunlit surface waters due to strong thermal stratification (vertical stability) of the upper water column. As a consequence, tropical and subtropical phytoplankton have devised alternative ways of acquiring nitrogen and phosphorus. Marine nitrogen fixation is a process by which specialized microbes utilize the abundant nitrogen gas from the atmosphere to convert elemental nitrogen into the bioavailable form ammonia. These nitrogen fixing phytoplankton and many others also use organic forms of phosphorus in the low latitude ocean where inorganic nutrients are often scarce. This project will significantly increase the number of dissolved organic nitrogen and dissolved organic phosphorus concentration measurements, especially from the currently under-sampled Pacific and Indian Oceans. Changes in the concentration of organic nutrients across the surface ocean will be used to infer rates of organic nutrient use by phytoplankton in numerical models. Specifically, the role for the biological uptake of dissolved organic phosphorus to stimulate the processes of marine nitrogen fixation and photosynthesis in the low latitude ocean will be quantified from the combined data and model output. The project will train one graduate student and several undergraduate students in both laboratory chemical analysis techniques and numerical simulation of ocean biological and chemical processes. New scientific knowledge will be shared with the public via a social media campaign and will inform the development of the next generation of global climate models.</p>
<p>The marine biogeochemical modeling community has identified the lack of dissolved organic nitrogen (DON) and especially dissolved organic phosphorus (DOP) concentration measurements from the upper 300 m of the global ocean as crucial gaps in our ability to accurately model export production and N2 fixation rates in the subtropics. The proposed work will significantly increase global data coverage of marine DON and DOP concentration measurements, in particular from under-sampled ocean regions in the Indian Ocean, western, central, and eastern tropical South Pacific, Gulf of Alaska, eastern subtropical and subpolar South Pacific, Southern Ocean, subtropical North Atlantic, and tropical South Atlantic Ocean basins. These new measurements will be assimilated in state-of-the-art biogeochemical models to constrain the relative cycling rates of DOP and DON and to quantify the role of preferential DOP consumption as a P source supporting export production and N2 fixation in the low latitude ocean. Model output will solve for the regionally-resolved fraction of new production that accumulates as DON and DOP, autotrophic DOP uptake rates, as well as the remineralization rates for DON and DOP. The model output will also include the first regionally variable rate estimates of euphotic zone DOP consumption sustaining export production and N2 fixation to be constrained by observations from the Pacific and Indian Oceans. Thus, the new concentration measurements and diagnostic modeling will allow us to evaluate the quantitative role for regional variability in DOP consumption and recycling that supports export production and N2 fixation in the low latitude ocean.</p>
<p>This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.</p>
DOP N2 fixation and export production
largerWorkCitation
project
eng; USA
oceans
South Pacific Ocean
153.9994
-75.7455
-32.5051
-30.0795
2017-07-03
2017-09-30
Global scope (see Description box for details)
0
BCO-DMO catalogue of parameters from Total dissolved nitrogen (TDN) concentrations and δ15N measurements from samples collected on R/V Nathaniel B. Palmer GO-SHIP cruises NBP1706 and NBP1707 in the South Pacific from Jul 3 to Sep 30, 2017
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
http://lod.bco-dmo.org/id/dataset-parameter/989658.rdf
Name: EXPOCODE
Units: unitless
Description: <p>Expedition Code Number</p>
http://lod.bco-dmo.org/id/dataset-parameter/989659.rdf
Name: SECT_ID
Units: unitless
Description: <p>US GO-SHIP Section Identification code</p>
http://lod.bco-dmo.org/id/dataset-parameter/989660.rdf
Name: STNNBR
Units: unitless
Description: <p>Station number where sample was collected</p>
http://lod.bco-dmo.org/id/dataset-parameter/989661.rdf
Name: CASTNO
Units: unitless
Description: <p>CTD Cast number</p>
http://lod.bco-dmo.org/id/dataset-parameter/989662.rdf
Name: Niskin_bottle_number
Units: unitless
Description: <p>Niskin bottle number</p>
http://lod.bco-dmo.org/id/dataset-parameter/989663.rdf
Name: DATE
Units: unitless
Description: <p>Date of sample collection</p>
http://lod.bco-dmo.org/id/dataset-parameter/989664.rdf
Name: LATITUDE
Units: decimal degree
Description: <p>Latitude of sample collection, Negative is South</p>
http://lod.bco-dmo.org/id/dataset-parameter/989666.rdf
Name: LONGITUDE
Units: decimal degree
Description: <p>Longitude of sample collection, Negative is West</p>
http://lod.bco-dmo.org/id/dataset-parameter/989668.rdf
Name: CTDPRS
Units: decibars
Description: <p>CTD Pressure</p>
http://lod.bco-dmo.org/id/dataset-parameter/989669.rdf
Name: CTDSAL
Units: practical salinity units
Description: <p>CTD Salinity</p>
http://lod.bco-dmo.org/id/dataset-parameter/989670.rdf
Name: CTDTMP
Units: degrees centigrade
Description: <p>CTD Temperature</p>
http://lod.bco-dmo.org/id/dataset-parameter/989671.rdf
Name: NITRAT_plus_NITRIT
Units: micromolar (µM)
Description: <p>nitrate+nitrite concentration</p>
http://lod.bco-dmo.org/id/dataset-parameter/989672.rdf
Name: TDN
Units: micromolar (µM)
Description: <p>Total dissolved nitrogen concentration</p>
http://lod.bco-dmo.org/id/dataset-parameter/989673.rdf
Name: TDN_d15N
Units: Per mil units relative to atmospheric N2 gas
Description: <p>Total dissolved nitrogen isotopic composition</p>
GB/NERC/BODC > British Oceanographic Data Centre, Natural Environment Research Council, United Kingdom
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
34956
https://darchive.mblwhoilibrary.org/server/api/core/bitstreams/3ab3819b-99a0-4a04-9683-6a23815e08d4/content
download
https://doi.org/10.26008/1912/bco-dmo.986627.1
download
onLine
dataset
<p>Total dissolved nitrogen (TDN) samples were collected from Niskin bottles deployed on a CTD rosette. All samples were filtered through a PES filter with 0.2 µm nominal pore size and frozen at -20 ˚C until analysis in the lab at Florida State University. We used the persulfate oxidation approach adapted from Knapp et al., 2005 to convert all TDN to nitrate, and the resulting nitrate concentration was determined using a chemiluminescent method, which quantitatively reduces NO<sub>3</sub><sup>-</sup>+NO<sub>2</sub><sup>-</sup> to NO gas in a heated, acidic vanadium (III) solution (Braman &amp; Hendrix, 1989). DON concentrations were computed by the difference between TDN and NO<sub>3</sub><sup>-</sup>+NO<sub>2</sub><sup>-</sup> concentrations, with NO<sub>3</sub><sup>-</sup>+NO<sub>2</sub><sup>-</sup> concentrations measured at sea using colorimetric methods (Armstrong et al., 1967) and reported at CCHDO Hydrographic Data Office (2023).</p>
<p>After TDN concentration analysis, each TDN sample was acidified to a pH = ~4, and the TDN δ<sup>15</sup>N was measured by the “denitrifier” method (Sigman et al., 2001; Casciotti et al., 2002; McIlvin &amp; Casciotti, 2011; Weigand et al., 2016). In samples with measurable NO<sub>3</sub><sup>-</sup>+NO<sub>2</sub><sup>-</sup> concentration, the δ<sup>15</sup>N of DON can be calculated by mass balance by subtracting the concentration and δ<sup>15</sup>N of NO<sub>3</sub><sup>-</sup>+NO<sub>2</sub><sup>-</sup> from the TDN concentration and TDN δ<sup>15</sup>N measurements (Knapp et al., 2005).</p>
Specified by the Principal Investigator(s)
- Imported "P062017TDNd15N.csv" into the BCO-DMO system
- Replaced spaces and special characters with underscores in keeping with BCO-DMO guidelines
- Exported file as "986627_v1_p06_tdn_d15n.csv"
Specified by BCO-DMO Data Managers
asNeeded
7.x-1.1
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
Thermo 42i chemiluminescent NOx box
Thermo 42i chemiluminescent NOx box
PI Supplied Instrument Name: Thermo 42i chemiluminescent NOx box PI Supplied Instrument Description:TDN concentration was measured on a Thermo 42i chemiluminescent NOx box. Sample concentrations were calibrated with standards that bracketed sample concentrations. Instrument Name: Chemiluminescence NOx Analyzer Instrument Short Name: Instrument Description: 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.
One example is the Teledyne Model T200: https://www.teledyne-api.com/products/nitrogen-compound-instruments/t200
CTD
CTD
PI Supplied Instrument Name: CTD PI Supplied Instrument Description:Total dissolved nitrogen (TDN) samples were collected from Niskin bottles deployed on a CTD rosette. Instrument Name: CTD Sea-Bird SBE 911plus Instrument Short Name:CTD SBE 911plus Instrument Description: The Sea-Bird SBE 911 plus is a type of CTD instrument package for continuous measurement of conductivity, temperature and pressure. The SBE 911 plus includes the SBE 9plus Underwater Unit and the SBE 11plus Deck Unit (for real-time readout using conductive wire) for deployment from a vessel. The combination of the SBE 9 plus and SBE 11 plus is called a SBE 911 plus. The SBE 9 plus uses Sea-Bird's standard modular temperature and conductivity sensors (SBE 3 plus and SBE 4). The SBE 9 plus CTD can be configured with up to eight auxiliary sensors to measure other parameters including dissolved oxygen, pH, turbidity, fluorescence, light (PAR), light transmission, etc.). more information from Sea-Bird Electronics Community Standard Description: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0058/
Niskin bottles
Niskin bottles
PI Supplied Instrument Name: Niskin bottles PI Supplied Instrument Description:Total dissolved nitrogen (TDN) samples were collected from Niskin bottles deployed on a CTD rosette. Instrument Name: Niskin bottle Instrument Short Name:Niskin bottle Instrument Description: A Niskin bottle (a next generation water sampler based on the Nansen bottle) is a cylindrical, non-metallic water collection device with stoppers at both ends. The bottles can be attached individually on a hydrowire or deployed in 12, 24, or 36 bottle Rosette systems mounted on a frame and combined with a CTD. Niskin bottles are used to collect discrete water samples for a range of measurements including pigments, nutrients, plankton, etc. Community Standard Description: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0412/
Thermo Delta V Advantage Isotope Ratio Mass Spectrometer
Thermo Delta V Advantage Isotope Ratio Mass Spectrometer
PI Supplied Instrument Name: Thermo Delta V Advantage Isotope Ratio Mass Spectrometer PI Supplied Instrument Description:TDN d15N was measured on a Thermo Delta V Advantage Isotope Ratio Mass Spectrometer. Sample isotopic composition was calibrated using standard bracketing techniques with IAEA N3 and USGS 34 NO3- d15N isotopic reference materials as described in McIlvin and Casciotti, 2011. Instrument Name: Thermo Fisher Scientific DELTA V Advantage isotope ratio mass spectrometer Instrument Short Name:Delta V Advantage Instrument Description: The Thermo Scientific DELTA V Advantage is an isotope ratio mass spectrometer designed to measure isotopic, elemental, and molecular ratios of organic and inorganic compounds. The DELTA V Advantage is the standard model of the DELTA V series of isotope ratio mass spectrometers, which can be upgraded to the DELTA V Plus. The DELTA V Advantage can be operated in Continuous Flow or Dual Inlet mode. The standard collector configuration is the Universal Triple Collector. H2 collectors with online hydrogen capability are optional. The DELTA V Advantage is controlled by an automated, integrated Isodat software suite. A magnet, whose pole faces determine the free flight space for the ions, eliminates the traditional flight tube. The magnet is designed for fast mass switching which is further supported by a fast jump control between consecutive measurements of multiple gases within one run. The sample gas is introduced at ground potential, eliminating the need for insulation of the flow path, ensuring 100 percent transfer into the ion source. The amplifiers register ion beams up to 50 V. The DELTA V Advantage has a sensitivity of 1200 molecules per ion (M/I) in Dual Inlet mode and 1500 M/I in Continuous Flow mode. It has a system stability of < 10 ppm and an effective magnetic detection radius of 191 nm. It has a mass range of 1 - 80 Dalton at 3 kV.
Cruise: NBP1706
NBP1706
Community Standard Description
International Council for the Exploration of the Sea
RVIB Nathaniel B. Palmer
vessel
NBP1706
Sabine Mecking
University of Washington Applied Physics Laboratory
Cruise: NBP1707
NBP1707
Community Standard Description
International Council for the Exploration of the Sea
RVIB Nathaniel B. Palmer
vessel
NBP1707
Rolf Sonnerup
UW-NOAA Joint Institute for the Study of the Atmosphere and Ocean
Community Standard Description
International Council for the Exploration of the Sea
RVIB Nathaniel B. Palmer
vessel