http://lod.bco-dmo.org/id/dataset/805324
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
2020-03-04
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
Bulk suspended PON d15N from several cruises conducted in the Southern Ocean south of Africa from 2012-2019
2020-03-04
publication
2020-03-04
revision
Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)
2020-03-13
publication
https://doi.org/10.1575/1912/bco-dmo.805324.1
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. (2020) Bulk suspended PON d15N from several cruises conducted in the Southern Ocean south of Africa from 2012-2019. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2020-03-04 [if applicable, indicate subset used]. doi:10.1575/1912/bco-dmo.805324.1 [access date]
Bulk suspended PON d15N from the region south of African sector Dataset Description: <p>Compilation of surface measurements of bulk suspended particulate organic nitrogen (PON) collected from the Southern Ocean south of Africa (spanning 0-42°E). Date, time, latitude, and longitude are the averages of the start and end values of each underway collection.</p> Methods and Sampling: <p>Bulk (&gt;0.3 um) suspended PON samples were collected from the underway intake (at 7 m depth) and frozen at −80°C until isotope analysis. The N isotope composition of bulk PON was measured by elemental analyser-isotope ratio mass spectrometry at the University of Cape Town. See methods section of Smart et al. (2020) for more detail.</p>
Funding provided by NSF Division of Polar Programs (NSF PLR) Award Number: PLR-1401489 Award URL: http://www.nsf.gov/awardsearch/showAward?AWD_ID=1401489
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1060947 Award URL: http://www.nsf.gov/awardsearch/showAward?AWD_ID=1060947
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-0922345 Award URL: http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=0922345
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: 1
Unknown
cruise
leg
ship
date
time
latitude
longitude
PONconc_avg
PONconc_sd
PONconc_n
PONd15N_avg
PONd15N_sd
PONd15N_n
ISO_DateTime_UTC
Thermo Scientific Delta V Plus mass spectrometer
Thermo Scientific FLASH 2000 elemental analyzer
theme
None, User defined
cruise id
leg of cruise
ship
date
time of day
latitude
longitude
particulate organic nitrogen
number of replicates
d15N
featureType
BCO-DMO Standard Parameters
Isotope-ratio Mass Spectrometer
Elemental Analyzer
instrument
BCO-DMO Standard Instruments
VOY03
SOSCEx1
VOY016
VOY019
ACE_Leg1
ACE_Leg3
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://www.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
Understanding the nitrogen isotopes of planktonic foraminifera: A modern Sargasso Sea study
https://www.bco-dmo.org/project/743583
Understanding the nitrogen isotopes of planktonic foraminifera: A modern Sargasso Sea study
<p><em>NSF Award Abstract:</em><br />
Nitrogen (N) and phosphorus are the two nutrients required in large quantity by phytoplankton in the ocean, and together they limit productivity throughout most of the tropical, subtropical, and temperate ocean. Both the cycling of N and its input/output budget have been argued to control the fertility of the ocean and the ocean's role in setting atmospheric CO2. The CaCO3 tests of foraminifera can represent a substantial fraction of marine sediments and have been used extensively in paleoceanography; they are an obvious target for isotopic analysis of microfossil-bound organic matter.</p>
<p>In recent years, researchers at Princeton have developed a protocol for the isotopic analysis of foraminiferal shell-bound N. The current protocol is at least 100 times more sensitive than typical on-line combustion, allowing for rapid progress with a N isotope archive that was previously not feasible to measure. Measurements on surface sediments and a downcore record from the Caribbean show the promise of foraminifera-bound del15N (fb-del15N) to provide both a robust N isotope archive for paleoceanography, and one with a unique potential of richness, given the existence of multiple foraminiferal species with different depth habitats and behaviors. Moreover, the finding from the Caribbean Sea record -- reduced N fixation in ice age Atlantic -- has changed the scientific conversation about the nature of the input/output budget of oceanic fixed N and its potential to change ocean fertility and atmospheric CO2. However, the controls on fb-del15N have not yet been adequately studied.</p>
<p>In this project, as a first major step in developing a foundation for the paleoceanographic application of fb-del15N, the same Princeton University team will study its genesis in the water column, transport to the seafloor, and early diagenesis. They will undertake this study in the Sargasso Sea south of Bermuda. This is one of the best studied regions of the ocean, in general and with respect to foraminifera, and a region that has been has been a focus of the N isotope research of the PI for the last decade and others previously. Moreover, its significant seasonality -- in physical oceanography, biogeochemistry, and foraminiferal species abundance -- will facilitate the effort to understand the controls on fb-del15N at a mechanistic level. The research team will participate in six Bermuda Atlantic Time-series Study (BATS) cruises over two years, collecting foraminifera and other N forms likely to provide insight into the controls on fb-del15N. From the nearby Oceanic Flux Program (OFP) moored sediment traps and from shallow sediments collected in the region, they will pick foraminifera shells and again make relevant ancillary measurements. This work will establish the relationship of foraminiferal biomass to shell-bound del15N for different species, and comparison of the foraminiferal isotope data with the upper ocean N pools will yield empirical isotopic relationships and work toward a mechanistic insight of fb-del15N (e.g., the importance of different N pools to the diets of different foraminifera; the role of algal symbionts). The sediment trap and surface sediment data will support the plankton tow data by integrating over longer time scales and will also address questions regarding late stage (e.g., gametogenic) calcification and the early diagenesis of fb-del15N and fb-N content.</p>
<p>Broader Impacts: This study will yield an improved understanding of the nutrient dynamics of foraminifera, a class of organisms whose shells are a central tool in micropaleontology and paleoclimatology. The project will also build on the principal investigator's involvement in the Bermuda Institute of Ocean Sciences as an asset for integrating ocean-related education and research at both the undergraduate and graduate levels.</p>
N Isotopes Foraminifera
largerWorkCitation
project
MRI: Acquisition of Stable Isotope Instrumentation for the Biogeosciences at Princeton University
https://www.bco-dmo.org/project/788982
MRI: Acquisition of Stable Isotope Instrumentation for the Biogeosciences at Princeton University
<p>NSF Award Abstract:</p>
<p>Intellectual Merit:<br />
The PIs are requesting funds to acquire a suite of instruments for stable isotope (N) research, including a denitrifier-based, natural abundance isotope system, a tracer isotope system, and general purpose natural abundance peripherals for an existing mass spectrometer. Specific instruments requested include a Thermo Electron MAT 253 stable isotope mass spectrometer, a Thermo DeltaVAdvantage stable isotope mass spectrometer with peripherals, an EA peripheral for combustion-based isotope analysis, and a GasBench II carbon dioxide preparation and purification system. The proposed instrumentation would enable research efforts examining natural stable isotope abundances that include ocean biogeochemistry and paleoceanography, terrestrial biogeochemistry, carbon isotopes in Precambrian Earth history. Stable isotope tracer research would include nitrification, nitrogen fixation, and carbon partitioning during biostimulation.</p>
<p>Broader Impacts:<br />
The PIs state that the proposed instrumentation would expand the research capabilities of the institution and specifically the Departments of Geosciences and Ecology and Evolutionary Biology. The improvements to the denitrifier method will also serve to expand the capabilities of the ocean research community at large. Additionally, the proposed instrumentation will enable method development and provide training for undergraduate students at the institution and those participating in a collaborative effort with the University of Cape Town.</p>
stable isotope instrumentation
largerWorkCitation
project
eng; USA
oceans
Southern Ocean south of Africa
0.0003
41.9621
-56.0768
-34.4835
2012-07-20
2019-04-16
From projects that focused on the following 2 locations: 1. Kerguelen Plateau 2. Sargasso Sea
0
BCO-DMO catalogue of parameters from Bulk suspended PON d15N from several cruises conducted in the Southern Ocean south of Africa from 2012-2019
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/805489.rdf
Name: cruise
Units: unitless
Description: Cruise identifier
http://lod.bco-dmo.org/id/dataset-parameter/805490.rdf
Name: leg
Units: unitless
Description: Cruise leg
http://lod.bco-dmo.org/id/dataset-parameter/805491.rdf
Name: ship
Units: unitless
Description: Ship name
http://lod.bco-dmo.org/id/dataset-parameter/805492.rdf
Name: date
Units: unitless
Description: Date; format: yyyy-mm-dd
http://lod.bco-dmo.org/id/dataset-parameter/805493.rdf
Name: time
Units: unitless
Description: Time; format: HH:MM
http://lod.bco-dmo.org/id/dataset-parameter/805494.rdf
Name: latitude
Units: decimal degrees
Description: Latitude; positive values = North
http://lod.bco-dmo.org/id/dataset-parameter/805495.rdf
Name: longitude
Units: decimal degrees
Description: Longitude; positive values = East
http://lod.bco-dmo.org/id/dataset-parameter/805496.rdf
Name: PONconc_avg
Units: micrometers (µm)
Description: Mean PON concentration. PON is the bulk (> 0.3 µm) particulate organic nitrogen in surface waters filtered from the ship's underway intake) concentration.
http://lod.bco-dmo.org/id/dataset-parameter/805497.rdf
Name: PONconc_sd
Units: micrometers (µm)
Description: Standard deviation of PONconc_avg
http://lod.bco-dmo.org/id/dataset-parameter/805498.rdf
Name: PONconc_n
Units: unitless
Description: Number of replicate measurements of PON
http://lod.bco-dmo.org/id/dataset-parameter/805499.rdf
Name: PONd15N_avg
Units: per mil vs AIR
Description: Mean PON d15N. d15N is the nitrogen isotopic composition of a sample expressed in delta notation (d15N in units of per mil, ‰) relative to atmospheric N2, where d15N = {[(15N/14N)sample/(15N/14N)atmN2] – 1} × 1000.
http://lod.bco-dmo.org/id/dataset-parameter/805500.rdf
Name: PONd15N_sd
Units: per mil vs AIR
Description: Standard deviation of PONd15N_avg
http://lod.bco-dmo.org/id/dataset-parameter/805501.rdf
Name: PONd15N_n
Units: unitless
Description: Number of replicate measurements of PONd15N
http://lod.bco-dmo.org/id/dataset-parameter/805502.rdf
Name: ISO_DateTime_UTC
Units: yyyy-MM-dd'T'HH:mm
Description: Date and time formatted to the ISO 8601 standard; format: yyyy-mm-ddTHH:MM
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
13498
https://darchive.mblwhoilibrary.org/bitstream/1912/25517/1/dataset-805324_southern-ocean-particulate-organic-n-isotopes__v1.tsv
download
https://doi.org/10.1575/1912/bco-dmo.805324.1
download
onLine
dataset
<p>Bulk (&gt;0.3 um) suspended PON samples were collected from the underway intake (at 7 m depth) and frozen at −80°C until isotope analysis. The N isotope composition of bulk PON was measured by elemental analyser-isotope ratio mass spectrometry at the University of Cape Town. See methods section of Smart et al. (2020) for more detail.</p>
Specified by the Principal Investigator(s)
<p>N isotope measurements were referenced to atmospheric N₂ using three in-house organic standards: Choc, Merck Gel, and Valine. Samples containing GF/F material were additionally corrected for the contribution of the N blank associated with the filter paper.</p>
<p>BCO-DMO Processing:<br />
- added ISO_DateTime field.</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
Thermo Scientific Delta V Plus mass spectrometer
Thermo Scientific Delta V Plus mass spectrometer
PI Supplied Instrument Name: Thermo Scientific Delta V Plus mass spectrometer 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/
Thermo Scientific FLASH 2000 elemental analyzer
Thermo Scientific FLASH 2000 elemental analyzer
PI Supplied Instrument Name: Thermo Scientific FLASH 2000 elemental analyzer Instrument Name: Elemental Analyzer Instrument Short Name: Instrument Description: Instruments that quantify carbon, nitrogen and sometimes other elements by combusting the sample at very high temperature and assaying the resulting gaseous oxides. Usually used for samples including organic material. Community Standard Description: http://vocab.nerc.ac.uk/collection/L05/current/LAB01/
Cruise: VOY03
VOY03
Community Standard Description
International Council for the Exploration of the Sea
R/V S.A. Agulhas II
vessel
Cruise: SOSCEx1
SOSCEx1
R/V S.A. Agulhas I
Community Standard Description
International Council for the Exploration of the Sea
R/V S.A. Agulhas I
vessel
Cruise: VOY016
VOY016
Community Standard Description
International Council for the Exploration of the Sea
R/V S.A. Agulhas II
vessel
Cruise: VOY019
VOY019
Community Standard Description
International Council for the Exploration of the Sea
R/V S.A. Agulhas II
vessel
Cruise: ACE_Leg1
ACE_Leg1
Community Standard Description
International Council for the Exploration of the Sea
R/V Akademik Tryoshnikov
vessel
ACE_Leg1
David Walton
Cruise: ACE_Leg3
ACE_Leg3
Community Standard Description
International Council for the Exploration of the Sea
R/V Akademik Tryoshnikov
vessel
Community Standard Description
International Council for the Exploration of the Sea
R/V S.A. Agulhas II
vessel
R/V S.A. Agulhas I
Community Standard Description
International Council for the Exploration of the Sea
R/V S.A. Agulhas I
vessel