http://lod.bco-dmo.org/id/dataset/805546
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
2020-03-06
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
Nitrate+nitrite and nitrate-only d15N from R/V S.A. Agulhas II cruises VOY016 and VOY019 in the Southern Ocean south of Africa during 2015-2016
2020-03-06
publication
2020-03-06
revision
Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)
2020-03-13
publication
https://doi.org/10.1575/1912/bco-dmo.805546.1
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) Nitrate+nitrite and nitrate-only d15N from R/V S.A. Agulhas II cruises VOY016 and VOY019 in the Southern Ocean south of Africa during 2015-2016. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2020-03-06 [if applicable, indicate subset used]. doi:10.1575/1912/bco-dmo.805546.1 [access date]
Nitrate+nitrite and nitrate-only δ15N from the Southern Ocean south of Africa Dataset Description: <p>Nitrate+nitrite and nitrate-only δ15N from the Southern Ocean south of Africa. The dataset includes hydrocast (depth-profile) and underway (surface; intake at 7 m depth) data. The former is accompanied by hydrographic data obtained during the CTD cast.</p> Methods and Sampling: <p>Seawater samples were collected aboard the R/V S.A. Agulhas II (from CTD Niskin bottles and the underway intake) and immediately frozen at −20°C until analysis. Hydrographic data for each profile station were acquired from a conductivity-temperature depth (CTD) sensor mounted on the Niskin bottle rosette.</p>
<p>An aliquot of each seawater sample was treated with sulfamic acid to remove nitrite (Granger &amp; Sigman, 2009). Both nitrate+nitrite and nitrate-only samples were measured for concentration by chemiluminescence (Braman &amp; Hendrix, 1989) and isotope composition using the denitrifier method (Sigman et al., 2001). Briefly, sample nitrate or nitrate+nitrite is converted to N₂O gas by denitrifying bacteria and measured for N isotope composition by GC-IRMS with an on-line N₂O extraction and purification system (Sigman et al., 2001; Casciotti et al., 2002; Weigand et al., 2016). The pooled standard deviations (1σ) of replicate denitrifier measurements was 0.09‰ for nitrate+nitrite δ¹⁵N and 0.06‰ for nitrate-only δ¹⁵N.</p>
<p>Hydrographic profiles were acquired by a Sea-Bird conductivity-temperature depth sensor during each cast. The isotopic composition of N₂O was measured at Princeton University by GC-IRMS using a Thermo MAT 253 mass spectrometer with a purpose-built on-line N₂O extraction and purification system.</p>
<p>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: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1401489
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 NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-0922345 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=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
ship
ISO_DateTime_UTC
date
time
latitude
longitude
depth_sample
depth_ctd
pressure_ctd
temperature_ctd
salinity_ctd
oxygen_ctd
fluorescence_ctd
potdens_calc
MLD_calc
d15N_avg_nitrate_nitrite
d15N_stdev_nitrate_nitrite
d15N_n_nitrate_nitrite
conc_avg_nitrate_nitrite
conc_stdev_nitrate_nitrite
conc_n_nitrate_nitrite
d15N_avg_nitrate
d15N_stdev_nitrate
d15N_n_nitrate
conc_avg_nitrate
conc_stdev_nitrate
conc_n_nitrate
Sea-Bird conductivity-temperature depth sensor
Thermo MAT 253
CTD Niskin bottles
theme
None, User defined
Cruise identfier
ship
ISO_DateTime_UTC
date
time of day
latitude
longitude
depth
water pressure
water temperature at measurement depth
salinity
dissolved Oxygen
fluorescence
density
mixed layer depth
delta 15N NO3+NO2
number of replicates
nitrate plus nitrite
d15N_NO3
Nitrate
featureType
BCO-DMO Standard Parameters
CTD Sea-Bird
Isotope-ratio Mass Spectrometer
Niskin bottle
instrument
BCO-DMO Standard Instruments
VOY016
VOY019
service
Deployment Activity
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
Understanding the nitrogen isotopes of planktonic foraminifera: A modern Sargasso Sea study
https://osprey.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://osprey.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
0.0002
38.4987
-54.0003
-39.4109
2015-07-26
2016-05-09
From projects that focused on the following 2 locations: 1. Kerguelen Plateau 2. Sargasso Sea
0
BCO-DMO catalogue of parameters from Nitrate+nitrite and nitrate-only d15N from R/V S.A. Agulhas II cruises VOY016 and VOY019 in the Southern Ocean south of Africa during 2015-2016
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/805584.rdf
Name: cruise
Units: unitless
Description: <p>Cruise identifier</p>
http://lod.bco-dmo.org/id/dataset-parameter/805585.rdf
Name: ship
Units: unitless
Description: <p>Ship name</p>
http://lod.bco-dmo.org/id/dataset-parameter/805586.rdf
Name: ISO_DateTime_UTC
Units: unitless
Description: <p>Date and time formatted to ISO8601 standard. Format: yyyy-mm-ddTHH:MM:SSZ</p>
http://lod.bco-dmo.org/id/dataset-parameter/805587.rdf
Name: date
Units: unitless
Description: <p>Date; format: yyyy-mm-dd</p>
http://lod.bco-dmo.org/id/dataset-parameter/805588.rdf
Name: time
Units: unitless
Description: <p>Time; format: HH:MM</p>
http://lod.bco-dmo.org/id/dataset-parameter/805589.rdf
Name: latitude
Units: decimal degrees
Description: <p>Latitude; positive values = North</p>
http://lod.bco-dmo.org/id/dataset-parameter/805590.rdf
Name: longitude
Units: decimal degrees
Description: <p>Longitude; positive values = East</p>
http://lod.bco-dmo.org/id/dataset-parameter/805591.rdf
Name: depth_sample
Units: meters (m)
Description: <p>The depth at which the niskin bottle was closed (from which seawater was collected for analysis)</p>
http://lod.bco-dmo.org/id/dataset-parameter/805592.rdf
Name: depth_ctd
Units: meters (m)
Description: <p>Depth of the nearest CTD sensor measurements, extracted from the continuous CTD files (where bottle files were not available)</p>
http://lod.bco-dmo.org/id/dataset-parameter/805593.rdf
Name: pressure_ctd
Units: decibars (db)
Description: <p>Pressure</p>
http://lod.bco-dmo.org/id/dataset-parameter/805594.rdf
Name: temperature_ctd
Units: degrees Celsius
Description: <p>Temperature measured by CTD</p>
http://lod.bco-dmo.org/id/dataset-parameter/805595.rdf
Name: salinity_ctd
Units: psu
Description: <p>Salinity measured by CTD</p>
http://lod.bco-dmo.org/id/dataset-parameter/805596.rdf
Name: oxygen_ctd
Units: milliliters per liter (ml/l)
Description: <p>Oxygen measured by CTD</p>
http://lod.bco-dmo.org/id/dataset-parameter/805597.rdf
Name: fluorescence_ctd
Units: milligrams per cubic meter (mg/m3)
Description: <p>Fluorescence measured by CTD</p>
http://lod.bco-dmo.org/id/dataset-parameter/805598.rdf
Name: potdens_calc
Units: kilograms per cubic meter (kg/m3)
Description: <p>Potential density, calculated from temperature and salinity</p>
http://lod.bco-dmo.org/id/dataset-parameter/805599.rdf
Name: MLD_calc
Units: meters (m)
Description: <p>Calculated mixed layer depth at each profile station, defined as the closest depth to the surface at which potential density is greater by greater than or equal to 0.03 kg/m3 than the value at a reference depth of 11 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/805600.rdf
Name: d15N_avg_nitrate_nitrite
Units: per mil vs AIR
Description: <p>Average d15N. d15N is the nitrogen isotopic composition of a sample (nitrate+nitrite) expressed in delta notation (d15N in units of per mil, ‰) relative to atmospheric N2, where d15N = {[(15N/14N)sample/(15N/14N)atmN2] – 1} × 1000</p>
http://lod.bco-dmo.org/id/dataset-parameter/805601.rdf
Name: d15N_stdev_nitrate_nitrite
Units: per mil vs AIR
Description: <p>Standard deviation of d15N (nitrate+nitrite)</p>
http://lod.bco-dmo.org/id/dataset-parameter/805602.rdf
Name: d15N_n_nitrate_nitrite
Units: unitless
Description: <p>Number of replicate measurements of d15N (nitrate+nitrite)</p>
http://lod.bco-dmo.org/id/dataset-parameter/805603.rdf
Name: conc_avg_nitrate_nitrite
Units: micromolar (uM)
Description: <p>Concentration of nitrate+nitrite in a seawater sample</p>
http://lod.bco-dmo.org/id/dataset-parameter/805604.rdf
Name: conc_stdev_nitrate_nitrite
Units: micromolar (uM)
Description: <p>Standard deviation of nitrate+nitrite concentration</p>
http://lod.bco-dmo.org/id/dataset-parameter/805605.rdf
Name: conc_n_nitrate_nitrite
Units: unitless
Description: <p>Number of replicate measurements of nitrate+nitrite concentration</p>
http://lod.bco-dmo.org/id/dataset-parameter/805606.rdf
Name: d15N_avg_nitrate
Units: per mil vs AIR
Description: <p>Average d15N. d15N is the nitrogen isotopic composition of a sample (nitrate only) expressed in delta notation (d15N in units of per mil, ‰) relative to atmospheric N2, where d15N = {[(15N/14N)sample/(15N/14N)atmN2] – 1} × 1000</p>
http://lod.bco-dmo.org/id/dataset-parameter/805607.rdf
Name: d15N_stdev_nitrate
Units: per mil vs AIR
Description: <p>Standard deviation of d15N (nitrate only)</p>
http://lod.bco-dmo.org/id/dataset-parameter/805608.rdf
Name: d15N_n_nitrate
Units: unitless
Description: <p>Number of replicate measurements of d15N (nitrate only)</p>
http://lod.bco-dmo.org/id/dataset-parameter/805609.rdf
Name: conc_avg_nitrate
Units: micromolar (uM)
Description: <p>Concentration of nitrate in a seawater sample</p>
http://lod.bco-dmo.org/id/dataset-parameter/805610.rdf
Name: conc_stdev_nitrate
Units: micromolar (uM)
Description: <p>Standard deviation of nitrate concentration</p>
http://lod.bco-dmo.org/id/dataset-parameter/805611.rdf
Name: conc_n_nitrate
Units: unitless
Description: <p>Number of replicate measurements of nitrate concentration</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
39503
https://darchive.mblwhoilibrary.org/bitstream/1912/25518/1/dataset-805546_southern-ocean-seawater-n-isotopes__v1.tsv
download
https://doi.org/10.1575/1912/bco-dmo.805546.1
download
onLine
dataset
<p>Seawater samples were collected aboard the R/V S.A. Agulhas II (from CTD Niskin bottles and the underway intake) and immediately frozen at −20°C until analysis. Hydrographic data for each profile station were acquired from a conductivity-temperature depth (CTD) sensor mounted on the Niskin bottle rosette.</p>
<p>An aliquot of each seawater sample was treated with sulfamic acid to remove nitrite (Granger &amp; Sigman, 2009). Both nitrate+nitrite and nitrate-only samples were measured for concentration by chemiluminescence (Braman &amp; Hendrix, 1989) and isotope composition using the denitrifier method (Sigman et al., 2001). Briefly, sample nitrate or nitrate+nitrite is converted to N₂O gas by denitrifying bacteria and measured for N isotope composition by GC-IRMS with an on-line N₂O extraction and purification system (Sigman et al., 2001; Casciotti et al., 2002; Weigand et al., 2016). The pooled standard deviations (1σ) of replicate denitrifier measurements was 0.09‰ for nitrate+nitrite δ¹⁵N and 0.06‰ for nitrate-only δ¹⁵N.</p>
<p>Hydrographic profiles were acquired by a Sea-Bird conductivity-temperature depth sensor during each cast. The isotopic composition of N₂O was measured at Princeton University by GC-IRMS using a Thermo MAT 253 mass spectrometer with a purpose-built on-line N₂O extraction and purification system.</p>
<p>See methods section of Smart et al. (2020) for more detail.</p>
Specified by the Principal Investigator(s)
<p>Isotope ratio measurements were referenced against automated injections from an N₂O from a gas cylinder, and then calibrated to N₂ in air using two international reference materials IAEA-N3 and USGS-34 that were included in every run. An in-house N₂O standard was also measured along with each batch of samples to monitor mass spectrometry.</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
Sea-Bird conductivity-temperature depth sensor
Sea-Bird conductivity-temperature depth sensor
PI Supplied Instrument Name: Sea-Bird conductivity-temperature depth sensor 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/
Thermo MAT 253
Thermo MAT 253
PI Supplied Instrument Name: Thermo MAT 253 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/
CTD Niskin bottles
CTD Niskin bottles
PI Supplied Instrument Name: CTD Niskin bottles 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: VOY016
VOY016
Community Standard Description
International Council for the Exploration of the Sea
R/V S.A. Agulhas II
vessel
VOY016
Sandy Thomalla
Council for Scientific and Industrial Research
Cruise: VOY019
VOY019
Community Standard Description
International Council for the Exploration of the Sea
R/V S.A. Agulhas II
vessel
VOY019
Hans M. Verheye
South African Department of Environmental Affairs
Community Standard Description
International Council for the Exploration of the Sea
R/V S.A. Agulhas II
vessel