http://lod.bco-dmo.org/id/dataset/846802
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
2021-03-24
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
Radium isotope (223Ra, 224Ra, and 226Ra) measurements from CTD and underway water samples collected on R/V Endeavor cruise EN640 from June-July 2019
2021-03-24
publication
2021-03-24
revision
Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)
2021-09-07
publication
https://doi.org/10.26008/1912/bco-dmo.846802.1
Richard N. Peterson
Coastal Carolina University
principalInvestigator
Joseph Montoya
Georgia Institute of Technology
principalInvestigator
Ajit Subramaniam
Lamont-Doherty Earth Observatory
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: Peterson, R. N., Montoya, J., Subramaniam, A. (2021) Radium isotope (223Ra, 224Ra, and 226Ra) measurements from CTD and underway water samples collected on R/V Endeavor cruise EN640 from June-July 2019. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2021-03-24 [if applicable, indicate subset used]. doi:10.26008/1912/bco-dmo.846802.1 [access date]
EN640 Radium Dataset Description: Methods and Sampling: <p>Water samples for radium isotope analysis were collected from both the ship's clean underway intake system ('U' designator in data) and niskin bottles attached to the CTD rosette ('C' designator in data). Salinity data were derived from the ship's clean underway intake system with SBE 21 SEACAT Thermosaliograph. Water samples were filtered through 47 mm GFF filters (unless otherwise noted), then passed slowly through 25 g (dry) acrylic fibers impregnated with MnO2 (Moore, 1976). Fibers were then washed 10x with Ra-free freshwater to remove salts and dried to a mass between 35 and 57 g for optimal humidity levels (Sun and Torgersen, 1998). Fibers were then immediately counted on a Radium Delayed Coincidence Counter (RaDeCC; Moore and Arnold, 1996) for total Ra-224 and Ra-223. Roughly 3 weeks later, fibers were counted again for supported Ra-224. Thus, excess ('XS') Ra-224 is the difference between total and supported Ra-224 measurements. Ra-226 activities were then measured on a radon emanation line as per Peterson et al. (2009).</p>
<p>Minimum detectable activities (dpm/100L) are calculated based on Currie (1968). Any measured values lower than the minimum detectable activity is labeled 'BD' in the dataset.</p>
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1736947 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1736947
completed
Richard N. Peterson
Coastal Carolina University
843-349-4057
Department of Coastal and Marine Systems Science P.O. Box 261954
Conway
SC
29528-6054
USA
rpeters2@coastal.edu
pointOfContact
Joseph Montoya
Georgia Institute of Technology
(404) 385-0479
School of Biological Sciences EST Bldg., 311 Ferst Drive
Atlanta
GA
30332
USA
montoya@gatech.edu
pointOfContact
Ajit Subramaniam
Lamont-Doherty Earth Observatory
845-365-8641
3 Marine Biology 61 Route 9W, P.O. Box 1000
Palisades
NY
10964
USA
ajit@ldeo.columbia.edu
pointOfContact
asNeeded
Dataset Version: 1
Unknown
U_or_C
Station
Cast
Date_Local
Time_Local
ISO_DateTime_UTC
Latitude
Longitude
Depth
Salinity
Sample_Volume
Ra223_Activity
Ra223_Unc
XS_Ra224_Activity
XS_Ra224_Unc
Ra226_Activity
Ra226_Unc
niskin bottles
ship's clean underway
Radium Delayed Coincidence Counter
SBE 21 SEACAT Thermosaliograph
theme
None, User defined
instrument
station
cast
date
time of day
ISO_DateTime_UTC
latitude
longitude
depth
salinity
volume
radium-223
radium-224
radium-226
featureType
BCO-DMO Standard Parameters
Niskin bottle
Pump - Surface Underway Ship Intake
Radium Delayed Coincidence Counter
Sea-Bird SeaCAT Thermosalinograph SBE 21
instrument
BCO-DMO Standard Instruments
EN640
service
Deployment Activity
Western Tropical North Atlantic
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.
Collaborative Research: Impact of the Amazon River Plume on Nitrogen Availability and Planktonic Food Web Dynamics in the Western Tropical North Atlantic
https://osprey.bco-dmo.org/project/751093
Collaborative Research: Impact of the Amazon River Plume on Nitrogen Availability and Planktonic Food Web Dynamics in the Western Tropical North Atlantic
<p><em>NSF Award Abstract:</em><br />
This is a focused program of field research in waters of the Western Tropical North Atlantic influenced by the Amazon River Plume during the high river flow season. The Amazon Plume region supports diverse plankton communities in a dynamic system driven by nutrients supplied by transport from the river proper as well as nutrients entrained from offshore waters by physical mixing and upwelling. This creates strong interactions among physical, chemical, and biological processes across a range of spatial and temporal scales. The field program will link direct measurements of environmental properties with focused experimental studies of nutrient supply and nutrient limitation of phytoplankton, as well as the transfer of phytoplankton nitrogen to the zooplankton food web. The Amazon Plume exhibits a close juxtaposition of distinct communities during the high-flow season, making it an ideal site for evaluating how nutrient availability, nutrient supply, and habitat longevity interact to drive offshore ecosystem dynamics and function. This project will include German collaborators and will seamlessly integrate education and research efforts. The investigators and their institutions have a strong commitment to undergraduate and graduate education and to increasing the diversity of the ocean science community through active recruiting and training efforts. The team has a strong track record of involving both undergraduate and graduate students in their field and lab research. The two research cruises planned will provide opportunities for students and technicians to interact with an interdisciplinary and international research team.</p>
<p>The ultimate objectives of this project are to understand the processes and interactions that promote distinct communities of nitrogen-fixing organisms (diazotrophs) and other phytoplankton around the Amazon Plume and to explore the impacts of these diazotroph-rich communities on zooplankton biomass and production. The research team includes scientists with expertise in nutrient and stable isotope biogeochemistry, remote sensing as well as specialists in characterizing water mass origin and history using naturally occurring radium isotopes. This combination of approaches will provide a unique opportunity to address fundamental questions related to plankton community structure, primary production, and links to secondary production in pelagic ecosystems. The project will address the following key questions focused on fundamental issues in plankton ecology resulting from previous research in this region:</p>
<p>A. What mechanisms promote the preferential delivery of bioavailable phosphorus and the resulting strong nitrogen limitation associated with the northern reaches of the Amazon Plume during the high flow season?</p>
<p>B. What factors lead to the clear niche separation between diazotrophs within and around the Amazon Plume and how are the distinct diazotroph communities influenced by hydrographic and biogeochemical controls associated with the Amazon River Plume and offshore upwelling processes?</p>
<p>C. How does the nitrogen fixed by the different types of diazotrophs contribute to secondary production, and how efficiently does diazotroph nitrogen move through the food web?</p>
Amazon River Plume Nitrogen
largerWorkCitation
project
eng; USA
oceans
Western Tropical North Atlantic
-60.0198
-50.3937
4.87673
16.0182
2019-06-14
2019-07-08
Amazon River plume
0
BCO-DMO catalogue of parameters from Radium isotope (223Ra, 224Ra, and 226Ra) measurements from CTD and underway water samples collected on R/V Endeavor cruise EN640 from June-July 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/846821.rdf
Name: U_or_C
Units: unitless
Description: <p>Underway (surface) or CTD sample designator</p>
http://lod.bco-dmo.org/id/dataset-parameter/846822.rdf
Name: Station
Units: unitless
Description: <p>Station number</p>
http://lod.bco-dmo.org/id/dataset-parameter/846823.rdf
Name: Cast
Units: unitless
Description: <p>Cast number at each station</p>
http://lod.bco-dmo.org/id/dataset-parameter/846824.rdf
Name: Date_Local
Units: mm/dd/yy
Description: <p>Local date (EST) sample collected</p>
http://lod.bco-dmo.org/id/dataset-parameter/846825.rdf
Name: Time_Local
Units: 0:00
Description: <p>Local time (EST) sample collected</p>
http://lod.bco-dmo.org/id/dataset-parameter/846826.rdf
Name: ISO_DateTime_UTC
Units: YYYY-MM-DDThh:mmZ
Description: <p>Date and time (GMT/UTC) sample collected formatted to ISO8601 standard</p>
http://lod.bco-dmo.org/id/dataset-parameter/846827.rdf
Name: Latitude
Units: decimal degrees North
Description: <p>Sampling latitude</p>
http://lod.bco-dmo.org/id/dataset-parameter/846828.rdf
Name: Longitude
Units: decimal degrees East
Description: <p>Sampling longitude</p>
http://lod.bco-dmo.org/id/dataset-parameter/846829.rdf
Name: Depth
Units: meters (m)
Description: <p>Water depth of sample collection</p>
http://lod.bco-dmo.org/id/dataset-parameter/846830.rdf
Name: Salinity
Units: unitless
Description: <p>Salinity of ship’s seawater intake system</p>
http://lod.bco-dmo.org/id/dataset-parameter/846831.rdf
Name: Sample_Volume
Units: liters (L)
Description: <p>Water sample volume</p>
http://lod.bco-dmo.org/id/dataset-parameter/846832.rdf
Name: Ra223_Activity
Units: dpm/100L
Description: <p>Radium-223 activity</p>
http://lod.bco-dmo.org/id/dataset-parameter/846833.rdf
Name: Ra223_Unc
Units: dpm/100L
Description: <p>1-sigma analytical uncertainty for Ra223</p>
http://lod.bco-dmo.org/id/dataset-parameter/846834.rdf
Name: XS_Ra224_Activity
Units: dpm/100L
Description: <p>Excess radium-224 activity</p>
http://lod.bco-dmo.org/id/dataset-parameter/846835.rdf
Name: XS_Ra224_Unc
Units: dpm/100L
Description: <p>1-sigma analytical uncertainty for Ra224</p>
http://lod.bco-dmo.org/id/dataset-parameter/846836.rdf
Name: Ra226_Activity
Units: dpm/100L
Description: <p>Radium-226 activity</p>
http://lod.bco-dmo.org/id/dataset-parameter/846837.rdf
Name: Ra226_Unc
Units: dpm/100L
Description: <p>1-sigma analytical uncertainty for Ra226</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
50661
https://darchive.mblwhoilibrary.org/bitstream/1912/27529/1/dataset-846802_amazon-plume-radium-2019__v1.tsv
download
https://doi.org/10.26008/1912/bco-dmo.846802.1
download
onLine
dataset
<p>Water samples for radium isotope analysis were collected from both the ship's clean underway intake system ('U' designator in data) and niskin bottles attached to the CTD rosette ('C' designator in data). Salinity data were derived from the ship's clean underway intake system with SBE 21 SEACAT Thermosaliograph. Water samples were filtered through 47 mm GFF filters (unless otherwise noted), then passed slowly through 25 g (dry) acrylic fibers impregnated with MnO2 (Moore, 1976). Fibers were then washed 10x with Ra-free freshwater to remove salts and dried to a mass between 35 and 57 g for optimal humidity levels (Sun and Torgersen, 1998). Fibers were then immediately counted on a Radium Delayed Coincidence Counter (RaDeCC; Moore and Arnold, 1996) for total Ra-224 and Ra-223. Roughly 3 weeks later, fibers were counted again for supported Ra-224. Thus, excess ('XS') Ra-224 is the difference between total and supported Ra-224 measurements. Ra-226 activities were then measured on a radon emanation line as per Peterson et al. (2009).</p>
<p>Minimum detectable activities (dpm/100L) are calculated based on Currie (1968). Any measured values lower than the minimum detectable activity is labeled 'BD' in the dataset.</p>
Specified by the Principal Investigator(s)
<p>Data processing was performed in Microsoft Excel (2016).</p>
<p>BCO-DMO Processing:<br />
- modified field names to conform with BCO-DMO naming conventions;<br />
- converted date/time field to ISO8601 format.</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
niskin bottles
niskin bottles
PI Supplied Instrument Name: 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/
ship's clean underway
ship's clean underway
PI Supplied Instrument Name: ship's clean underway Instrument Name: Pump - Surface Underway Ship Intake Instrument Short Name:Pump-Ship Intake Instrument Description: The 'Pump-underway ship intake' system indicates that samples are from the ship's clean water intake pump. This is essentially a surface water sample from a source of uncontaminated near-surface (commonly 3 to 7 m) seawater that can be pumped continuously to shipboard laboratories on research vessels. There is typically a temperature sensor near the intake (known as the hull temperature) to provide measurements that are as close as possible to the ambient water temperature. The flow from the supply is typically directed through continuously logged sensors such as a thermosalinograph and a fluorometer. Water samples are often collected from the underway supply that may also be referred to as the non-toxic supply. Ideally the data contributor has specified the depth in the ship's hull at which the pump is mounted. Community Standard Description: http://vocab.nerc.ac.uk/collection/L05/current/31/
Radium Delayed Coincidence Counter
Radium Delayed Coincidence Counter
PI Supplied Instrument Name: Radium Delayed Coincidence Counter PI Supplied Instrument Description:Radium isotopes (224Ra and 223Ra) were analyzed with a Radium Delayed Coincidence Counter (Moore and Arnold, 1996). This system was calibrated to standard MnO2 prepared from NIST-traceable solutions of Th-232 and Ac-227 (with daughters in equilibrium). Instrument Name: Radium Delayed Coincidence Counter Instrument Short Name:RaDeCC Instrument Description: The RaDeCC is an alpha scintillation counter that distinguishes decay events of short-lived radium daughter products based on their contrasting half-lives. This system was pioneered by Giffin et al. (1963) and adapted for radium measurements by Moore and Arnold (1996).
References:
Giffin, C., A. Kaufman, W.S. Broecker (1963). Delayed coincidence counter for the assay of actinon and thoron. J. Geophys. Res., 68, pp. 1749-1757.
Moore, W.S., R. Arnold (1996). Measurement of 223Ra and 224Ra in coastal waters using a delayed coincidence counter. J. Geophys. Res., 101 (1996), pp. 1321-1329.
Charette, Matthew A.; Dulaiova, Henrieta; Gonneea, Meagan E.; Henderson, Paul B.; Moore, Willard S.; Scholten, Jan C.; Pham, M. K. (2012). GEOTRACES radium isotopes interlaboratory comparison experiment. Limnology and Oceanography - Methods, vol 10, pg 451.
SBE 21 SEACAT Thermosaliograph
SBE 21 SEACAT Thermosaliograph
PI Supplied Instrument Name: SBE 21 SEACAT Thermosaliograph Instrument Name: Sea-Bird SeaCAT Thermosalinograph SBE 21 Instrument Short Name:SeaBird SBE-21 Seacat Instrument Description: A platinum-electrode conductivity sensor and a thermistor mounted in a corrosion-resistant plastic and titanium housing designed to be continuously plumbed into a vessel's pumped seawater supply. The instrument may be interfaced to a remote SBE 38 temperature sensor mounted either on the hull or in the seawater inlet. Data are both stored in internal memory and output to a serial port for external logging. Conductivity is measured in the range 0-7 S/m with an accuracy of 0.001 S/m and a resolution of 0.0001 S/m. Housing temperature is measured in the range -5-35C with an accuracy of 0.01 C and a resolution of 0.001 C. Remote temperature is measured in the range -5-35C with an accuracy of 0.001 C and a resolution of 0.0003 C. More information at http://www.seabird.com/products/spec_sheets/21data.htm. Community Standard Description: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0667/
Cruise: EN640
EN640
R/V Endeavor
Community Standard Description
International Council for the Exploration of the Sea
R/V Endeavor
vessel
EN640
Joseph Montoya
Georgia Institute of Technology
R/V Endeavor
Community Standard Description
International Council for the Exploration of the Sea
R/V Endeavor
vessel