http://lod.bco-dmo.org/id/dataset/615082
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
2015-10-05
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
Tropical Pacific nitrate N and O isotopes in the tropical Pacific from 2003-2007 (CAREER project, Diatom-bound_N_Isotopes project)
2016-01-19
publication
2016-01-19
revision
BCO-DMO Linked Data URI
2016-01-19
creation
http://lod.bco-dmo.org/id/dataset/615082
Patrick Rafter
University of California-Irvine
principalInvestigator
Daniel M. Sigman
Princeton 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: Rafter, P., Sigman, D. M. (2016) Tropical Pacific nitrate N and O isotopes in the tropical Pacific from 2003-2007 (CAREER project, Diatom-bound_N_Isotopes project). Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 19 January 2016) Version Date 2016-01-19 [if applicable, indicate subset used]. http://lod.bco-dmo.org/id/dataset/615082 [access date]
Tropical Pacific nitrate N and O isotopes Dataset Description: <p>Spatial distribution and temporal variation of nitrate nitrogen and oxygen isotopes in the upper equatorial Pacific Ocean<br />
Nitrate N and O isotopes reveal nitrate utilization spatial and temporal variability</p>
<p>These data were collected on the R/V Ka’imimoana and R/V Ronald H. Brown (various cruises between 2003 and 2007)</p>
<p><strong>Related files and references:&nbsp;</strong><br />
This dataset is discussed in Rafter, P.A., Sigman, D.M., 2016. Spatial distribution and temporal variation of nitrate nitrogen and oxygen isotopes in the upper equatorial Pacific Ocean. Limnol. Oceanogr. 61, 14–31. doi:10.1002/lno.10152</p> Methods and Sampling: <p><strong>Sampling and Analytical Methodology:</strong><br />
Nitrate isotope measurements were performed using the “Denitrifier” method (Sigman et al. 2001; Casciotti et al. 2002). Measurements are referenced to atmospheric N2 or Vienna Standard Mean Ocean Water, respectively. The analytical precision was 0.2 per mil for nitrate N isotopes and 0.3 per mil for nitrate O isotopes based on a seawater-based, in-house standard included in every batch of analyses. Nitrite was removed from all samples using the protocol of Granger and Sigman (2009). Nitrate concentrations were measured by reduction to NO using a vanadium(III) reagent, followed by chemiluminescence measurement of NO (Braman and Hendrix 1989). Hydrographic data (salinity, temperature, and oxygen) for each cruise were acquired from NOAA’s Pacific Marine Environmental Laboratory data portal (www.epic.noaa.gov). Acoustic Doppler Current Profiler (ADCP) measurements for the upper 200 m were available for most stations (with the notable exception of the boreal spring 2005 cruise along 1108W) and are available through the University of Hawai’i (currents.soest.hawaii.edu).</p>
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-0447570 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=0447570
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1060947 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1060947
completed
Patrick Rafter
University of California-Irvine
858-405-0539
31503 Shrewsbury Dr.
Laguna Beach
CA
92651
USA
prafter@uci.edu
pointOfContact
Daniel M. Sigman
Princeton University
609-258-2194
Department of Geosciences M52 Guyot Hall
Princeton
NJ
08544
USA
sigman@princeton.edu
pointOfContact
asNeeded
Dataset Version: 19 January 2016
Unknown
Sampling_Date
Latitude
Longitude
Depth
nitrate
nitrate_d15N
nitrate_d18O
temperature
salinity
potential_temperature
potential_density
oxygen
mixed_layer_depth
zonal_velocity
theme
None, User defined
date
lat_degs
lon_degs
depth
Nitrate
d15N_NO3
d18O_NO3
temperature of sample or a generic measurement (not in-situ water temp)
salinity
potential temperature
sigma-theta potential density
dissolved Oxygen
mixed layer depth
Uranium
featureType
BCO-DMO Standard Parameters
RAFTER-TropicalPacific
service
Deployment Activity
Tropical Pacific
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.
CAREER: Nitrate Isotopes and Biogeochemistry; A Plan for coupling
https://osprey.bco-dmo.org/project/2188
CAREER: Nitrate Isotopes and Biogeochemistry; A Plan for coupling
<p>Nitrate is a ubiquitous form of biologically available nitrogen in the environment. Based on previous method development in the principal investigator's laboratory, CAREER graduate students and undergraduates investigate the nitrogen (N) and oxygen (O) isotopes of nitrate as 'tracers' of the N cycle, focusing on the marine environment. Research centers on two projects: (1) lab culture, in vitro assay, and field incubation studies of the coupled N and O isotope dynamics of nitrate assimilation and denitrification, two of the critical reactions in the N cycle; and (2) incorporation of the N and O isotopes of nitrate into numerical models of ocean circulation and biogeochemistry. These projects, in the context of the oceanic data sets generated in the principal investigator's laboratory, allow for the quantification of biogeochemical processes the signals of which are otherwise complicated by their simultaneous occurrence and by ocean circulation.</p>
<p>Oceanic data used in this project includes Nitrogen and delta 15N of dissolved nitrate relative to atmospheric N2 (dN15_NO3) collected during five cruises in the Southern Ocean -- in September, 1997, March, 1998, and August, 1998, February, 2001, and November 2006. During the last two cruises, samples of Oxygen isotopic composition (18O/16O) of nitrate (d180_NO3) were also collected.</p>
<p>Related files and references:<br />
DiFiore, P. J., D. M. Sigman, T. W. Trull, M. J. Lourey, K. Karsh, G.Cane, and R. Ho (2006), Nitrogen isotope constraints on subantarctic biogeochemistry, J. Geophys. Res., 111, C08016, doi:10.1029/2005JC003216.</p>
<p>DiFiore, P. J., D. M. Sigman, and R. B. Dunbar (2009), Upper ocean nitrogen fluxes in the Polar Antarctic Zone: Constraints from the nitrogen and oxygen isotopes of nitrate, Geochem. Geophys. Geosyst.,10, Q11016, doi:10.1029/2009GC002468.</p>
CAREER
largerWorkCitation
project
High-resolution, Assemblage-specific Records of Diatom-bound N Isotopes from the Indian Sector of the Antarctic Ocean
https://osprey.bco-dmo.org/project/557250
High-resolution, Assemblage-specific Records of Diatom-bound N Isotopes from the Indian Sector of the Antarctic Ocean
<p><em>Description from NSF award abstract:</em><br />
The high concentration of the major nutrients nitrate and phosphate is a fundamental characteristic of the Antarctic Zone in the Southern Ocean and is central to its role in global ocean fertility and the global carbon cycle. The isotopic composition of diatom-bound organic nitrogen is one of the best hopes for reconstructing the nutrient status of polar surface waters over glacial cycles, which in turn may hold the explanation for the decline in atmospheric carbon dioxide during ice ages. The PIs propose to generate detailed diatom-bound nitrogen isotope (δ15Ndb) records from high sedimentation rate cores from the Kerguelen Plateau. Because the cores were collected at relatively shallow seafloor depths, they have adequate planktonic and benthic foraminifera to develop accurate age models. The resulting data could be compared with climate records from Antarctic ice cores and other archives to investigate climate-related changes, including the major steps into and out of ice ages and the millennial-scale events that occur during ice ages and at their ends. The records generated in this project will provide a critical test of hypotheses for the cause of lower ice age CO2.</p>
<p>This study will contribute to the goal of understanding ice ages and past CO2 changes, which both have broad implications for future climate. Undergraduates will undertake summer internships, with the possibility of extending their work into junior year projects and senior theses. In addition, the PI will lead modules for two Princeton programs for middle school teachers and will host a teacher for a six-week summer research project.</p>
Diatom-bound_N_Isotopes
largerWorkCitation
project
eng; USA
oceans
Tropical Pacific
2016-01-19
From projects that focused on the following 2 locations: 1. Subantarctic waters, Antarctic Zone, and Ross Sea 2. Kerguelen Plateau
0
BCO-DMO catalogue of parameters from Tropical Pacific nitrate N and O isotopes in the tropical Pacific from 2003-2007 (CAREER project, Diatom-bound_N_Isotopes 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
http://lod.bco-dmo.org/id/dataset-parameter/615093.rdf
Name: Sampling_Date
Units: YYYYMMDD
Description: <p>Sampling Date</p>
http://lod.bco-dmo.org/id/dataset-parameter/615094.rdf
Name: Latitude
Units: degrees
Description: <p>Latitude</p>
http://lod.bco-dmo.org/id/dataset-parameter/615095.rdf
Name: Longitude
Units: degrees
Description: <p>Longitude</p>
http://lod.bco-dmo.org/id/dataset-parameter/615096.rdf
Name: Depth
Units: meters
Description: <p>Depth</p>
http://lod.bco-dmo.org/id/dataset-parameter/615097.rdf
Name: nitrate
Units: umol*kg^-3
Description: <p>nitrate</p>
http://lod.bco-dmo.org/id/dataset-parameter/615098.rdf
Name: nitrate_d15N
Units: per mil
Description: <p>nitrate d15N</p>
http://lod.bco-dmo.org/id/dataset-parameter/615099.rdf
Name: nitrate_d18O
Units: per mil
Description: <p>nitrate d18O</p>
http://lod.bco-dmo.org/id/dataset-parameter/615100.rdf
Name: temperature
Units: degrees celsius
Description: <p>temperature</p>
http://lod.bco-dmo.org/id/dataset-parameter/615101.rdf
Name: salinity
Units: PSU
Description: <p>salinity</p>
http://lod.bco-dmo.org/id/dataset-parameter/615102.rdf
Name: potential_temperature
Units: degrees celsius
Description: <p>potential temperature</p>
http://lod.bco-dmo.org/id/dataset-parameter/615103.rdf
Name: potential_density
Units: kg*m^-3
Description: <p>potential density</p>
http://lod.bco-dmo.org/id/dataset-parameter/615104.rdf
Name: oxygen
Units: umol/kg
Description: <p>oxygen</p>
http://lod.bco-dmo.org/id/dataset-parameter/615105.rdf
Name: mixed_layer_depth
Units: meters
Description: <p>mixed layer depth</p>
http://lod.bco-dmo.org/id/dataset-parameter/615106.rdf
Name: zonal_velocity
Units: cm*s^-1
Description: <p>zonal velocity</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
39925
https://datadocs.bco-dmo.org/file/933jzngH2jO7Bx/Surface_Nitrate.csv
Surface_Nitrate.csv
Primary data file for dataset ID 615082
download
https://osprey.bco-dmo.org/dataset/615082/data/download
download
onLine
dataset
<p><strong>Sampling and Analytical Methodology:</strong><br />
Nitrate isotope measurements were performed using the “Denitrifier” method (Sigman et al. 2001; Casciotti et al. 2002). Measurements are referenced to atmospheric N2 or Vienna Standard Mean Ocean Water, respectively. The analytical precision was 0.2 per mil for nitrate N isotopes and 0.3 per mil for nitrate O isotopes based on a seawater-based, in-house standard included in every batch of analyses. Nitrite was removed from all samples using the protocol of Granger and Sigman (2009). Nitrate concentrations were measured by reduction to NO using a vanadium(III) reagent, followed by chemiluminescence measurement of NO (Braman and Hendrix 1989). Hydrographic data (salinity, temperature, and oxygen) for each cruise were acquired from NOAA’s Pacific Marine Environmental Laboratory data portal (www.epic.noaa.gov). Acoustic Doppler Current Profiler (ADCP) measurements for the upper 200 m were available for most stations (with the notable exception of the boreal spring 2005 cruise along 1108W) and are available through the University of Hawai’i (currents.soest.hawaii.edu).</p>
Specified by the Principal Investigator(s)
<p><strong>Data Processing:</strong><br />
Data are averages of at least 2 measurements per sample.</p>
<p><strong>BCO-DMO Processing Notes</strong><br />
- Generated from original file "prafter2015EqPacSurfNitrateData-LO.txt contributed by Patrick Rafter<br />
- Individual Day, Month, Year columns combined into a single date column formatted as YYYYMMDD<br />
- Parameter names edited to conform to BCO-DMO naming convention found at <a href="http://usjgofs.whoi.edu/naming-guidelines.html" target="_blank">Choosing Parameter Name</a><br />
- "no data" in original file replaced with "nd" (no data)<br />
- Data updated with corrected lat/lon values 19Jan2016/srg</p>
Specified by the Principal Investigator(s)
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
Deployment: RAFTER-TropicalPacific
RAFTER-TropicalPacific
RAFTER Tropical Pacific Nitrate N and O Isotopes
synthesis
RAFTER-TropicalPacific
Patrick Rafter
University of California-Irvine
RAFTER Tropical Pacific Nitrate N and O Isotopes
synthesis