http://lod.bco-dmo.org/id/dataset/933707
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
2024-07-24
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
Nitrite (NO2-) isotopes and concentrations from the U.S. GEOTRACES EPZT cruise (GP16, TN303) on R/V Thomas G. Thompson in the tropical Pacific from October to December 2013
2024-07-30
publication
2024-07-30
revision
Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)
2024-07-31
publication
https://doi.org/10.26008/1912/bco-dmo.933707.1
Karen L. Casciotti
Stanford 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: Casciotti, K. L., Gluschankoff, N. (2024) Nitrite (NO2-) isotopes and concentrations from the U.S. GEOTRACES EPZT cruise (GP16, TN303) on R/V Thomas G. Thompson in the tropical Pacific from October to December 2013. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2024-07-30 [if applicable, indicate subset used]. doi:10.26008/1912/bco-dmo.933707.1 [access date]
GP16 Nitrite Isotopes and Concentrations Dataset Description: Methods and Sampling: <p>Seawater samples were collected at sea from Niskin bottles and were immediately analyzed for nitrite concentration. If sufficient nitrite concentrations (&gt;0.1 micromoles per liter (umol/L)) were observed, samples were preserved as nitrous oxide (N2O) using sodium azide and acetic acid to selectively convert nitrite to nitrous oxide (McIlvin and Altabet, 2005). In the laboratory, the resultant N2O was analyzed using a custom purge and trap gas bench connected to an isotope ratio mass spectrometer. Nitrite isotope standards RSIL-N23, -N7373, and -N10219 were analyzed alongside the seawater samples to normalize nitrite d15N and d18O values to reference scales (Casciotti et al. 2007).</p>
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1233339 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1233339
completed
Karen L. Casciotti
Stanford University
650-721-5545
Department of Environmental Earth System Science 473 Via Ortega, Y2E2 Building, Room 140
Stanford
CA
94305
USA
kcasciotti@stanford.edu
pointOfContact
asNeeded
Dataset Version: 1
Unknown
STNNBR
GEOTRC_EVENTNO
GEOTRC_SAMPNO
DATE
LATITUDE
LONGITUDE
CTDPRS
DEPTH
CTDTMP
CTDSAL
NITRITE
NITRITE_15_14_D_DELTA_BOTTLE_x5fmqg
SD1_NITRITE_15_14_D_DELTA_BOTTLE_x5fmqg
Flag_NITRITE_15_14_D_DELTA_BOTTLE_x5fmqg
NITRITE_18_16_D_DELTA_BOTTLE_iqunnm
SD1_NITRITE_18_16_D_DELTA_BOTTLE_iqunnm
Flag_NITRITE_18_16_D_DELTA_BOTTLE_iqunnm
custom purge and trap gas bench connected to an isotope ratio mass spectrometer
Thermo Fisher DeltaPLUS XP Isotope Ratio Mass Spectrometer
Niskin bottle
theme
None, User defined
station
event
sample identification
date
latitude
longitude
water pressure
depth
water temperature at measurement depth
salinity
Nitrite
d15N
quality flag
oxygen 16 to oxygen 18 ratio
featureType
BCO-DMO Standard Parameters
Automated Purge and Trap System
Isotope-ratio Mass Spectrometer
Niskin bottle
instrument
BCO-DMO Standard Instruments
TN303
service
Deployment Activity
Eastern Tropical Pacific - Transect from Peru to Tahiti
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.
U.S. GEOTRACES
http://www.geotraces.org/
U.S. GEOTRACES
GEOTRACES is a SCOR sponsored program; and funding for program infrastructure development is provided by the U.S. National Science Foundation.
GEOTRACES gained momentum following a special symposium, S02: Biogeochemical cycling of trace elements and isotopes in the ocean and applications to constrain contemporary marine processes (GEOSECS II), at a 2003 Goldschmidt meeting convened in Japan. The GEOSECS II acronym referred to the Geochemical Ocean Section Studies To determine full water column distributions of selected trace elements and isotopes, including their concentration, chemical speciation, and physical form, along a sufficient number of sections in each ocean basin to establish the principal relationships between these distributions and with more traditional hydrographic parameters;
* To evaluate the sources, sinks, and internal cycling of these species and thereby characterize more completely the physical, chemical and biological processes regulating their distributions, and the sensitivity of these processes to global change; and
* To understand the processes that control the concentrations of geochemical species used for proxies of the past environment, both in the water column and in the substrates that reflect the water column.
GEOTRACES will be global in scope, consisting of ocean sections complemented by regional process studies. Sections and process studies will combine fieldwork, laboratory experiments and modelling. Beyond realizing the scientific objectives identified above, a natural outcome of this work will be to build a community of marine scientists who understand the processes regulating trace element cycles sufficiently well to exploit this knowledge reliably in future interdisciplinary studies.
Expand "Projects" below for information about and data resulting from individual US GEOTRACES research projects.
U.S. GEOTRACES
largerWorkCitation
program
U.S. GEOTRACES East Pacific Zonal Transect (GP16)
http://www.geotraces.org/
U.S. GEOTRACES East Pacific Zonal Transect (GP16)
<p><strong>From the NSF Award Abstract</strong><br />
The mission of the International GEOTRACES Program (<a href="https://www.geotraces.org/" target="_blank">https://www.geotraces.org/</a>), of which the U.S. chemical oceanography research community is a founding member, is "to identify processes and quantify fluxes that control the distributions of key trace elements and isotopes in the ocean, and to establish the sensitivity of these distributions to changing environmental conditions" (GEOTRACES Science Plan, 2006). In the United States, ocean chemists are currently in the process of organizing a zonal transect in the eastern tropical South Pacific (ETSP) from Peru to Tahiti as the second cruise of the U.S.GEOTRACES Program. This Pacific section includes a large area characterized by high rates of primary production and particle export in the eastern boundary associated with the Peru Upwelling, a large oxygen minimum zone that is a major global sink for fixed nitrogen, and a large hydrothermal plume arising from the East Pacific Rise. This particular section was selected as a result of open planning workshops in 2007 and 2008, with a final recommendation made by the U.S.GEOTRACES Steering Committee in 2009. It is the first part of a two-stage plan that will include a meridional section of the Pacific from Tahiti to Alaska as a subsequent expedition.</p>
<p>This award provides funding for management of the U.S.GEOTRACES Pacific campaign to a team of scientists from the University of Southern California, Old Dominion University, and the Woods Hole Oceanographic Institution. The three co-leaders will provide mission leadership, essential support services, and management structure for acquiring the trace elements and isotopes samples listed as core parameters in the International GEOTRACES Science Plan, plus hydrographic and nutrient data needed by participating investigators. With this support from NSF, the management team will (1) plan and coordinate the 52-day Pacific research cruise described above; (2) obtain representative samples for a wide variety of trace metals of interest using conventional CTD/rosette and GEOTRACES Sampling Systems; (3) acquire conventional JGOFS/WOCE-quality hydrographic data (CTD, transmissometer, fluorometer, oxygen sensor, etc) along with discrete samples for salinity, dissolved oxygen (to 1 uM detection limits), plant pigments, redox tracers such as ammonium and nitrite, and dissolved nutrients at micro- and nanomolar levels; (4) ensure that proper QA/QC protocols are followed and reported, as well as fulfilling all GEOTRACES Intercalibration protocols; (5) prepare and deliver all hydrographic-type data to the GEOTRACES Data Center (and US data centers); and (6) coordinate cruise communications between all participating investigators, including preparation of a hydrographic report/publication.</p>
<p>Broader Impacts: The project is part of an international collaborative program that has forged strong partnerships in the intercalibration and implementation phases that are unprecedented in chemical oceanography. The science product of these collective missions will enhance our ability to understand how to interpret the chemical composition of the ocean, and interpret how climate change will affect ocean chemistry. Partnerships include contributions to the infrastructure of developing nations with overlapping interests in the study area, in this case Peru. There is a strong educational component to the program, with many Ph.D. students carrying out thesis research within the program.</p>
<p><em>Figure 1. The 2013 GEOTRACES EPZT Cruise Track. [click on the image to view a larger version]</em><br />
<a href="http://dmoserv3.whoi.edu/data_docs/GEOTRACES/EPZT/GEOTRACES_EPZT_TN303_CruiseTrack.png" target="_blank"><img alt="" src="https://datadocs.bco-dmo.org/d3/data_docs/GEOTRACES/EPZT/GEOTRACES_EPZT_TN303_CruiseTrack.png" /></a></p>
U.S. GEOTRACES EPZT
largerWorkCitation
project
GEOTRACES Peru-Tahiti Nitrogen Isotope Measurements
https://osprey.bco-dmo.org/project/650090
GEOTRACES Peru-Tahiti Nitrogen Isotope Measurements
<p><strong>Description from NSF award abstract:</strong><br />
Nitrogen (N) is an essential macronutrient whose availability can limit primary production and the capacity of the biological pump to export carbon from the surface ocean on seasonal, annual, decadal, and millennial timescales. The inventory of fixed (bioavailable) N in the ocean is driven by biological processes such as nitrogen fixation, denitrification, and anaerobic ammonia oxidation (anammox). Water column oxygen deficient zones (ODZs) are important sites for fixed N loss, as well as N2O production, and they are projected to expand and intensify in the coming years as global warming increases ocean stratification and decreases ventilation. It is important to understand the distribution of nitrate, nitrite, and N2O isotopes in relation to current ocean conditions of oxygen and trace element availability order to interpret past and future changes in nitrate signals.</p>
<p>In this project, a team of researchers from Stanford University, University of Massachusetts at Dartmouth, and Brown University will measure the nitrogen- and oxygen-isotopic composition (del15N and del18O) of nitrate, nitrite, and nitrous oxide in seawater samples collected along the GEOTRACES Pacific Peru-Tahiti Section. Values of del15N and del18O will also be measured in nitrate from aerosol and rain samples to inform our interpretation of the N isotope budget and isotopic gradients within the tropical South Pacific. Finally, N2/Ar and N2 del15N will be determined to close the N mass and isotope budgets. Nitrate del15N is a GEOTRACES "core parameter" that will complement other measurements, such as bioactive trace element concentrations and speciation, Si isotope variations, as well as redox and productivity proxies.</p>
<p>The GEOTRACES Peru-Tahiti section provides a rare opportunity to track the fate of the isotopic signals of N loss from one of the largest water column ODZs. Furthermore, little is known about the effect of N recycling through hydrothermal vents on nitrate isotopes in the deep ocean, and this section will allow quantitative tracking of this input. Together, these measurements will yield insight into the relative rates of modern N cycle processes and will provide background information for paleoceanographic applications.</p>
EPZT Nitrogen Isotopes
largerWorkCitation
project
eng; USA
oceans
Eastern Tropical Pacific - Transect from Peru to Tahiti
-151.9996
-77.3761
-16.0006
-10.25
2013-10-29
2013-12-16
From projects that focused on the following 2 locations: 1. Eastern Tropical Pacific - Transect from Peru to Tahiti (GP16) 2. East Pacific Zonal Transect
0
BCO-DMO catalogue of parameters from Nitrite (NO2-) isotopes and concentrations from the U.S. GEOTRACES EPZT cruise (GP16, TN303) on R/V Thomas G. Thompson in the tropical Pacific from October to December 2013
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/933722.rdf
Name: STNNBR
Units: unitless
Description: <p>Station number</p>
http://lod.bco-dmo.org/id/dataset-parameter/933723.rdf
Name: GEOTRC_EVENTNO
Units: unitless
Description: <p>GEOTRACES event number</p>
http://lod.bco-dmo.org/id/dataset-parameter/933724.rdf
Name: GEOTRC_SAMPNO
Units: unitless
Description: <p>GEOTRACES sample number</p>
http://lod.bco-dmo.org/id/dataset-parameter/933725.rdf
Name: DATE
Units: unitless
Description: <p>Date of sampling</p>
http://lod.bco-dmo.org/id/dataset-parameter/933726.rdf
Name: LATITUDE
Units: decimal degrees
Description: <p>Latitude; South is negative</p>
http://lod.bco-dmo.org/id/dataset-parameter/933727.rdf
Name: LONGITUDE
Units: decimal degrees
Description: <p>Longitude; West is negative</p>
http://lod.bco-dmo.org/id/dataset-parameter/933728.rdf
Name: CTDPRS
Units: decibars
Description: <p>Pressure</p>
http://lod.bco-dmo.org/id/dataset-parameter/933729.rdf
Name: DEPTH
Units: meters (m)
Description: <p>Depth</p>
http://lod.bco-dmo.org/id/dataset-parameter/933730.rdf
Name: CTDTMP
Units: degrees Celsius
Description: <p>Temperature</p>
http://lod.bco-dmo.org/id/dataset-parameter/933731.rdf
Name: CTDSAL
Units: PSU
Description: <p>Salinity</p>
http://lod.bco-dmo.org/id/dataset-parameter/933732.rdf
Name: NITRITE
Units: micromoles per liter (umol/L)
Description: <p>Nitrite concentration</p>
http://lod.bco-dmo.org/id/dataset-parameter/933733.rdf
Name: NITRITE_15_14_D_DELTA_BOTTLE_x5fmqg
Units: permille
Description: <p>Average d15N of nitrite measurements in reference to atmospheric nitrogen gas, expressed in permille notation. (Code at the end of column name is GEOTRACES DOoR identifier.)</p>
http://lod.bco-dmo.org/id/dataset-parameter/933734.rdf
Name: SD1_NITRITE_15_14_D_DELTA_BOTTLE_x5fmqg
Units: permille
Description: <p>Standard deviation d15N of nitrite measurements in reference to atmospheric nitrogen gas, expressed in permille notation. (Code at the end of column name is GEOTRACES DOoR identifier.)</p>
http://lod.bco-dmo.org/id/dataset-parameter/933735.rdf
Name: Flag_NITRITE_15_14_D_DELTA_BOTTLE_x5fmqg
Units: unitless
Description: <p>Data quality control flag from Data quality control flag from SeaDataNet: 1 = good value; 2 = probably good value; 3 = probably bad value; 4 = bad value; 9 = missing value.</p>
http://lod.bco-dmo.org/id/dataset-parameter/933736.rdf
Name: NITRITE_18_16_D_DELTA_BOTTLE_iqunnm
Units: permille
Description: <p>Average d18O of nitrite measurements in reference to atmospheric nitrogen gas, expressed in permille notation. (Code at the end of column name is GEOTRACES DOoR identifier.)</p>
http://lod.bco-dmo.org/id/dataset-parameter/933737.rdf
Name: SD1_NITRITE_18_16_D_DELTA_BOTTLE_iqunnm
Units: permille
Description: <p>Standard deviation d18O of nitrite measurements in reference to atmospheric nitrogen gas, expressed in permille notation. (Code at the end of column name is GEOTRACES DOoR identifier.)</p>
http://lod.bco-dmo.org/id/dataset-parameter/933738.rdf
Name: Flag_NITRITE_18_16_D_DELTA_BOTTLE_iqunnm
Units: unitless
Description: <p>Data quality control flag from Data quality control flag from SeaDataNet: 1 = good value; 2 = probably good value; 3 = probably bad value; 4 = bad value; 9 = missing value.</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
19699
https://darchive.mblwhoilibrary.org/server/api/core/bitstreams/5ec66387-d1d5-4d1e-90e4-f5cb54f8e3e3/content
download
https://doi.org/10.26008/1912/bco-dmo.933707.1
download
onLine
dataset
<p>Seawater samples were collected at sea from Niskin bottles and were immediately analyzed for nitrite concentration. If sufficient nitrite concentrations (&gt;0.1 micromoles per liter (umol/L)) were observed, samples were preserved as nitrous oxide (N2O) using sodium azide and acetic acid to selectively convert nitrite to nitrous oxide (McIlvin and Altabet, 2005). In the laboratory, the resultant N2O was analyzed using a custom purge and trap gas bench connected to an isotope ratio mass spectrometer. Nitrite isotope standards RSIL-N23, -N7373, and -N10219 were analyzed alongside the seawater samples to normalize nitrite d15N and d18O values to reference scales (Casciotti et al. 2007).</p>
Specified by the Principal Investigator(s)
<p>Nitrite d15N and δ18O analyses were calibrated against aliquots of the nitrite isotope standards RSIL-N23, RSIL-N7373, and RSIL-N10219 (Casciotti et al., 2007) prepared and analyzed in parallel with each batch of samples. These standards are used to correct for blanks, drift, and to report nitrite isotope data on VSMOW and Air reference scales for d18O and d15N, respectively (Casciotti et al., 2007).</p>
<p>A quality control (QC) flag was also added for each measurement using the SeaDataNet QC guidelines available at <a href="https://www.seadatanet.org/Standards/Data-Quality-Control" target="_blank">https://www.seadatanet.org/Standards/Data-Quality-Control</a>:</p>
<p>1 = good value;<br />
2 = probably good value;<br />
3 = probably bad value;<br />
4 = bad value;<br />
6 = value below detection;<br />
9 = missing value.</p>
Specified by the Principal Investigator(s)
- Imported original file "gp16_no2_bcodmo_240619.xlsx" into the BCO-DMO system
- Flagged "NaN" as a missing data value (missing data are empty/blank in the final CSV file).
- Converted DATE field to YYYY-MM-DD format.
- Renamed fields to comply with BCO-DMO naming conventions.
- Rounded the LATITUDE, LONGITUDE, CTDTMP, and CTDSAL columns to 2 decimal places as requested by the data provider.
- Saved the final file as "933707_v1_gp16_nitrite_isotopes_and_concentrations.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
custom purge and trap gas bench connected to an isotope ratio mass spectrometer
custom purge and trap gas bench connected to an isotope ratio mass spectrometer
PI Supplied Instrument Name: custom purge and trap gas bench connected to an isotope ratio mass spectrometer PI Supplied Instrument Description:This equipment extracts dissolved gases from the water samples, traps the extracted compounds under liquid nitrogen temperature, and then releases the trapped gases into the gas chromatograph and then to the Isotope Ratio Mass Spectrometer via an open split (McIlvin and Casciotti, 2011). It is automated and controlled by a desktop computer and ISODAT 3.0 software. Instrument Name: Automated Purge and Trap System Instrument Short Name: Instrument Description: This equipment removes dissolved gases from the water samples, traps the extracted compounds on a cold trap and then heats the trap and injects the trapped gases into the gas chromatograph. It is automated and controlled by a laptop computer.
Thermo Fisher DeltaPLUS XP Isotope Ratio Mass Spectrometer
Thermo Fisher DeltaPLUS XP Isotope Ratio Mass Spectrometer
PI Supplied Instrument Name: Thermo Fisher DeltaPLUS XP Isotope Ratio Mass Spectrometer PI Supplied Instrument Description:The Isotope-ratio Mass Spectrometer is used to measure the relative abundance of isotopes in a given sample. The instrument is equipped with faraday cup collectors for determining the ratios of m/z 44, 45, and 46 in N2O generated from samples using the azide method (McIlvin and Altabet, 2005). Instrument Name: Isotope-ratio Mass Spectrometer Instrument Short Name:IR Mass Spec; IRMS Instrument Description: 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). Community Standard Description: http://vocab.nerc.ac.uk/collection/L05/current/LAB16/
Niskin bottle
Niskin bottle
PI Supplied Instrument Name: Niskin bottle PI Supplied Instrument Description:A Niskin bottle is a cylindrical, non-metallic water collection device with stoppers at both ends. On GP16, the 12-place 30-liter (L) Niskin rosette was used to collect discrete water samples for nitrite isotope analyses. 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/
Cruise: TN303
TN303
R/V Thomas G. Thompson
Community Standard Description
International Council for the Exploration of the Sea
R/V Thomas G. Thompson
vessel
TN303
James W. Moffett
University of Southern California
http://dmoserv3.whoi.edu/data_docs/GEOTRACES/EPZT/GT13_EPZT_ODFReport_All.pdf
Report describing TN303
R/V Thomas G. Thompson
Community Standard Description
International Council for the Exploration of the Sea
R/V Thomas G. Thompson
vessel