http://lod.bco-dmo.org/id/dataset/557616
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
2015-05-05
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
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)
2015-05-05
publication
2015-05-05
revision
BCO-DMO Linked Data URI
2015-05-05
creation
http://lod.bco-dmo.org/id/dataset/557616
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: Sigman, D. M. (2015) 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). Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 05 May 2015) Version Date 2015-05-05 [if applicable, indicate subset used]. http://lod.bco-dmo.org/id/dataset/557616 [access date]
Wintertime nitrate delta 15N and delta 18O from hydrocasts in the Southern Ocean south of Africa. Dataset Description: <p>Wintertime nitrate delta 15N and delta 18O from the Southern Ocean south of Africa from hydrocasts taken on the July 2012 R/V <em>S.A. Agulhas II</em> VOY03 expedition. The dataset includes hydrocast (depth-profile) data along with the hydrographic data accompanying each CTD.</p>
<p>&nbsp;</p>
<p>Note: In addition to the awards identified below, the dataset was also supported by funding from the South African National Research Foundation (NRF), Applied Centre for Climate and Earth Systems Science (ACCESS), University of Cape Town (UCT), and the Grand Challenges Program of Princeton University.</p> Methods and Sampling: <p>Samples were collected aboard the R/V <em>S.A. Agulhas II</em> and analyzed in the Sigman lab at Princeton University using the "denitrifier method" to convert sample nitrate to N<sub>2</sub>O gas. The isotopic composition of N<sub>2</sub>O was measured by GC-IRMS using a Thermo MAT 253 mass spectrometer with a purpose-built on-line N<sub>2</sub>O extraction and purification system. For the nitrate+nitrite data, the pooled sample standard deviation is 0.05‰ for delta 15N (n = 3-7) and 0.17‰ for delta 18O (n = 3-5). For the ‘nitrate-only’ data, the pooled sample standard deviation is 0.05‰ for delta 15N (n = 3-7) and 0.13‰ for delta 18O (n = 3-7). See methods section of Smart et al. (2015) for details of sample collection, isotope analysis and data quality.</p>
<p><strong>Related Publications:</strong><br />
Smart, S.M., S.E. Fawcett, S.J. Thomalla, M.A. Weigand, C.J.C. Reason, and D.M. Sigman. 2015. Isotopic evidence for nitrification in the Antarctic winter mixed layer, <em>Global Biogeochem. Cycles</em>,<em> 29</em>, doi: <a href="http://dx.doi.org/10.1002/2014GB005013" target="_blank">10.1002/2014GB005013</a>.</p>
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1136345 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1136345
Funding provided by NSF Division of Polar Programs (NSF PLR) Award Number: PLR-1401489 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1401489
Funding provided by NSF Division of Polar Programs (NSF PLR) Award Number: PLR-0612198 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=0612198
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
Funding provided by European Commission Seventh Framework Programme (FP7-ENV-2010) Award Number: FP7 265294
completed
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: 05 May 2015
Unknown
station
date
time
lat
lon
depth_mixed_layer
sample
depth
temp
sal
oxygen_corr
sigma_t
NO3_NO2_mean
NO3_NO2_stdev
d15N_NO3_NO2_mean
d15N_NO3_NO2_stdev
d18Ocorr_NO3_NO2_mean
d18O_NO3_NO2_stdev
NO3_mean
NO3_stdev
d15N_NO3_mean
d15N_NO3_stdev
d18O_NO3_mean
d18O_NO3_stdev
month
day
year
ISO_DateTime_UTC
CTD
Niskin bottle
Sea-Bird SBE 43
theme
None, User defined
station
date
time of day
latitude
longitude
mixed layer depth
sample identification
depth
water temperature at measurement depth
salinity
dissolved Oxygen
sigma-t
nitrate plus nitrite
standard deviation
No BCO-DMO term
Nitrate
d15N_NO3
d18O_NO3
month of year
day of month
year
ISO_DateTime_UTC
featureType
BCO-DMO Standard Parameters
CTD Sea-Bird
Niskin bottle
Sea-Bird SBE 43 Dissolved Oxygen Sensor
instrument
BCO-DMO Standard Instruments
VOY03
service
Deployment Activity
Southern Ocean south of Africa
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.
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
Southern Ocean south of Africa
2015-05-05
Kerguelen Plateau
0
BCO-DMO catalogue of parameters from 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)
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/557760.rdf
Name: station
Units: dimensionless
Description: <p>Station number.</p>
http://lod.bco-dmo.org/id/dataset-parameter/557761.rdf
Name: date
Units: mm/dd/yy
Description: <p>Month, day, and year of sampling.</p>
http://lod.bco-dmo.org/id/dataset-parameter/557762.rdf
Name: time
Units: HHMM
Description: <p>Time, in hours and minutes, of sampling.</p>
http://lod.bco-dmo.org/id/dataset-parameter/557763.rdf
Name: lat
Units: decimal degrees
Description: <p>Latitude in decimal degrees North. (Negative values = South).</p>
http://lod.bco-dmo.org/id/dataset-parameter/557764.rdf
Name: lon
Units: decimal degrees
Description: <p>Longitude in decimal degrees East.</p>
http://lod.bco-dmo.org/id/dataset-parameter/557765.rdf
Name: depth_mixed_layer
Units: meters
Description: <p>Mixed layer calculated from sigma-t using ref depth = 32 m. Mixed layer depth at each station is defined as the closest depth to the surface at which sigma theta is greater by >= 0.03 kg m-3 than the value at a reference depth of 32 m (the shallowest depth common to every CTD station) (based on the criterion of de Boyer Montégut et al. (2004)).</p>
http://lod.bco-dmo.org/id/dataset-parameter/557766.rdf
Name: sample
Units: dimensionless
Description: <p>Sample ID number.</p>
http://lod.bco-dmo.org/id/dataset-parameter/557767.rdf
Name: depth
Units: meters
Description: <p>Sample depth.</p>
http://lod.bco-dmo.org/id/dataset-parameter/557768.rdf
Name: temp
Units: degrees Celsius ( C)
Description: <p>Water temperature.</p>
http://lod.bco-dmo.org/id/dataset-parameter/557769.rdf
Name: sal
Units: practical salinity units (psu)
Description: <p>Salinity.</p>
http://lod.bco-dmo.org/id/dataset-parameter/557770.rdf
Name: oxygen_corr
Units: milliliters per liter (ml/l)
Description: <p>Oxygen (corrected).</p>
http://lod.bco-dmo.org/id/dataset-parameter/557771.rdf
Name: sigma_t
Units: kilograms per cubic meter (kg/m^3)
Description: <p>Potential density (sigma-theta); calculated from temperature and salinity.</p>
http://lod.bco-dmo.org/id/dataset-parameter/557772.rdf
Name: NO3_NO2_mean
Units: micromolar (uM)
Description: <p>Mean nitrate (NO3) plus nitrite (NO2) concentration of a sample in micromolar units.</p>
http://lod.bco-dmo.org/id/dataset-parameter/557773.rdf
Name: NO3_NO2_stdev
Units: micromolar (uM)
Description: <p>Standard deviation of the nitrate (NO3) plus nitrite (NO2) concentration of a sample in micromolar units.</p>
http://lod.bco-dmo.org/id/dataset-parameter/557774.rdf
Name: d15N_NO3_NO2_mean
Units: per mil
Description: <p>delta 15N of NO3+NO2. 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.</p>
http://lod.bco-dmo.org/id/dataset-parameter/557775.rdf
Name: d15N_NO3_NO2_stdev
Units: per mil
Description: <p>Standard deviation of d15N_NO3_NO2_mean.</p>
http://lod.bco-dmo.org/id/dataset-parameter/557776.rdf
Name: d18Ocorr_NO3_NO2_mean
Units: per mil
Description: <p>delta 18O of NO3+NO2. 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.</p>
http://lod.bco-dmo.org/id/dataset-parameter/557777.rdf
Name: d18O_NO3_NO2_stdev
Units: per mil
Description: <p>Standard deviation of d18O_NO3_NO2_mean.</p>
http://lod.bco-dmo.org/id/dataset-parameter/557778.rdf
Name: NO3_mean
Units: micromolar (uM)
Description: <p>Mean nitrate (NO3) concentration of a sample in micromolar units, measured after nitrite (NO2) had been removed (using the protocol of Granger and Sigman (2009)).</p>
http://lod.bco-dmo.org/id/dataset-parameter/557779.rdf
Name: NO3_stdev
Units: micromolar (uM)
Description: <p>Standard deviation of the nitrate (NO3) concentration of a sample in micromolar units, measured after nitrite (NO2) had been removed (using the protocol of Granger and Sigman (2009)).</p>
http://lod.bco-dmo.org/id/dataset-parameter/557780.rdf
Name: d15N_NO3_mean
Units: per mil
Description: <p>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.</p>
http://lod.bco-dmo.org/id/dataset-parameter/557781.rdf
Name: d15N_NO3_stdev
Units: per mil
Description: <p>Standard deviation of d15N_NO3_mean.</p>
http://lod.bco-dmo.org/id/dataset-parameter/557782.rdf
Name: d18O_NO3_mean
Units: per mil
Description: <p>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.</p>
http://lod.bco-dmo.org/id/dataset-parameter/557783.rdf
Name: d18O_NO3_stdev
Units: per mil
Description: <p>Standard deviation of d18O_NO3_mean.</p>
http://lod.bco-dmo.org/id/dataset-parameter/557894.rdf
Name: month
Units: mm (01 to 12)
Description: <p>2-digit month of year.</p>
http://lod.bco-dmo.org/id/dataset-parameter/557896.rdf
Name: day
Units: dd (01 to 31)
Description: <p>2-digit day of month.</p>
http://lod.bco-dmo.org/id/dataset-parameter/557898.rdf
Name: year
Units: YYYY
Description: <p>4-digit year.</p>
http://lod.bco-dmo.org/id/dataset-parameter/558248.rdf
Name: ISO_DateTime_UTC
Units: YYYY-mm-ddTHH:MM:SS.xxZ
Description: <p>Date and time (UTC) formatted to ISO 8601 standard, where T indicates the start of the time string and Z indicates UTC.</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
37530
https://datadocs.bco-dmo.org/file/M77XqMofzLvRvX/hydrocast.csv
hydrocast.csv
Primary data file for dataset ID 557616
download
https://osprey.bco-dmo.org/dataset/557616/data/download
download
onLine
dataset
<p>Samples were collected aboard the R/V <em>S.A. Agulhas II</em> and analyzed in the Sigman lab at Princeton University using the "denitrifier method" to convert sample nitrate to N<sub>2</sub>O gas. The isotopic composition of N<sub>2</sub>O was measured by GC-IRMS using a Thermo MAT 253 mass spectrometer with a purpose-built on-line N<sub>2</sub>O extraction and purification system. For the nitrate+nitrite data, the pooled sample standard deviation is 0.05‰ for delta 15N (n = 3-7) and 0.17‰ for delta 18O (n = 3-5). For the ‘nitrate-only’ data, the pooled sample standard deviation is 0.05‰ for delta 15N (n = 3-7) and 0.13‰ for delta 18O (n = 3-7). See methods section of Smart et al. (2015) for details of sample collection, isotope analysis and data quality.</p>
<p><strong>Related Publications:</strong><br />
Smart, S.M., S.E. Fawcett, S.J. Thomalla, M.A. Weigand, C.J.C. Reason, and D.M. Sigman. 2015. Isotopic evidence for nitrification in the Antarctic winter mixed layer, <em>Global Biogeochem. Cycles</em>,<em> 29</em>, doi: <a href="http://dx.doi.org/10.1002/2014GB005013" target="_blank">10.1002/2014GB005013</a>.</p>
Specified by the Principal Investigator(s)
<p>Individual sample analyses were referenced against automated injections of N<sub>2</sub>O from a gas cylinder; however, the N<sub>2</sub>O cylinder is not used as the absolute reference. Rather, each sample run included replicates of two international reference materials, IAEA-N3 and USGS-34 that were used to calibrate isotope ratios to that of N<sub>2</sub> in air (for delta 15N) and VSMOW (for delta 18O). An in-house N<sub>2</sub>O standard was also run with each batch of samples to monitor mass spectrometry. See methods section of Smart et al. (2015) for a description of the procedures followed.</p>
<p>BCO-DMO Processing Notes:<br />
- Modified parameter names to conform with BCO-DMO naming conventions.<br />
- Replaced blanks (missing data) with 'nd', meaning 'no data'.</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
CTD
CTD
PI Supplied Instrument Name: CTD PI Supplied Instrument Description:Circumpolar fronts were identified from surface and subsurface (200m) temperature and salinity properties using data obtained from a Sea-Bird conductivity-temperature-depth (CTD) sensor mounted on the Niskin bottle rosette, as well as
from 28 underway-CTD and 88 expendable bathythermograph deployments. Instrument Name: CTD Sea-Bird Instrument Short Name:CTD Sea-Bird Instrument Description: A Conductivity, Temperature, Depth (CTD) sensor package from SeaBird Electronics. This instrument designation is used when specific make and model are not known or when a more specific term is not available in the BCO-DMO vocabulary. Refer to the dataset-specific metadata for more information about the specific CTD used. More information from: http://www.seabird.com/ Community Standard Description: http://vocab.nerc.ac.uk/collection/L05/current/130/
Niskin bottle
Niskin bottle
PI Supplied Instrument Name: Niskin bottle 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/
Sea-Bird SBE 43
Sea-Bird SBE 43
PI Supplied Instrument Name: Sea-Bird SBE 43 PI Supplied Instrument Description:Dissolved oxygen profiles (obtained for every CTD cast from a mounted Sea-Bird SBE 43 sensor) were used together with potential density, salinity, and nitrate profiles to identify key water masses. Instrument Name: Sea-Bird SBE 43 Dissolved Oxygen Sensor Instrument Short Name:SBE-43 DO Instrument Description: The Sea-Bird SBE 43 dissolved oxygen sensor is a redesign of the Clark polarographic membrane type of dissolved oxygen sensors. more information from Sea-Bird Electronics Community Standard Description: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0036/
Cruise: VOY03
VOY03
Community Standard Description
International Council for the Exploration of the Sea
R/V S.A. Agulhas II
vessel
Community Standard Description
International Council for the Exploration of the Sea
R/V S.A. Agulhas II
vessel