http://lod.bco-dmo.org/id/dataset/988549
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
2025-11-07
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
Specific activities of dissolved radon-222 collected from underway samples during STING II cruise EN704 on R/V Endeavor in the Gulf of Mexico in Jul 2023
2025-11-07
publication
2025-11-07
revision
Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)
2025-11-25
publication
https://doi.org/10.26008/1912/bco-dmo.988549.1
Joseph Tamborski
Old Dominion University
principalInvestigator
Rene Maurice Boiteau
University of Minnesota
principalInvestigator
Kristen Nicolle Buck
Oregon State University
principalInvestigator
Phoebe Dreux Chappell
University of South Florida
principalInvestigator
Timothy M. Conway
University of South Florida
principalInvestigator
Angela N. Knapp
Florida State University
principalInvestigator
Chris Smith
United States Geological Survey
principalInvestigator
Aaron Alorda-Kleinglass
Old Dominion 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: Tamborski, J., Lindgren, A., Alorda-Kleinglass, A., Buck, K. N., Boiteau, R. M., Chappell, P. D., Conway, T. M., Smith, C., Knapp, A. N. (2025) Specific activities of dissolved radon-222 collected from underway samples during STING II cruise EN704 on R/V Endeavor in the Gulf of Mexico in Jul 2023. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2025-11-07 [if applicable, indicate subset used]. doi:10.26008/1912/bco-dmo.988549.1 [access date]
STING Radon Underway Samples 2023 Dataset Description: Methods and Sampling: <p>Radon samples were collected and analyzed in two ways: as discrete grab samples and continuously from the ship’s underway system.&nbsp;This dataset contains the underway (continuous) measurements from July 2023. Discrete grab samples (including February and June/July collections) are provided in the related dataset.</p>
<p>For discrete radon-222 samples, six-liter seawater samples were collected into an 8 L Nalgene high density polyethylene jerrican (hereafter referred to as jerrican) with a three-port cap fitted with tubing, as described by Stringer and Burnett (2004). This approach is similar to the commercially available Big Bottle System (Big Bottle System Manual, 2018) but allows for a sufficient headspace volume of gas, to increase the total sample volume and thus a lower detection limit. Samples were immediately sealed with screw-compressor clamps on the tubing in two locations to prevent radon-222 loss from the headspace. All discrete radon-222 samples were analyzed within 48 hours of collection. Jerricans were connected either to a RAD8 or RAD7, both commercially available radon-in-air detectors (Durridge, Inc.). Detectors were initially purged with Drierite to reduce internal humidity to below 10% and background counts were recorded. Following Stringer and&nbsp;Burnett (2004), jerrican samples were degassed with the built-in air pump for 60 minutes in a closed-air loop. Samples were counted for a minimum of three hours (“Sniff” mode) to reach statistically significant counts. Following, sample volume was precisely measured using a graduated cylinder.</p>
<p>For underway radon-222 analyses, water was pumped into a showerhead gas equilibrator (RAD-AQUA, Durridge, Inc.) at a flow rate &gt; 2 liters min<sup>-1</sup> with a fifteen-minute counting interval, following Burnett et al. (2001).</p>
<p>For both discrete and underway measurements, data files were downloaded using CAPTURE software (Durridge, Inc.). Radon-in-air was calculated by dividing the total counts-per-minute (cpm; background corrected) in window-A by the RAD7/8 detector efficiency. For discrete samples, additional corrections were made as the ratio of total air volume (volume of tubing/drying column connector, jerrican, and chamber) to chamber air volume. For both discrete and underway measurements, in-situ seawater salinity was taken from the ship underway system or CTD (bottom waters), and temperature of the radon-222 sample from the internal air temperature of the RAD7/8 system. Radon-in-air to radon-in-water solubility corrections were made following Schubert et al. (2012), and samples were decay-corrected to the time of collection. Errors are propagated from counting statistics and detector efficiencies. Specific activities are reported as total radon-222 (supported from the in-situ decay of its parent Ra-226 plus excess radon-222).</p>
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-2148836 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=2148836
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-2149091 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=2149091
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-2148989 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=2148989
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-2148812 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=2148812
completed
Joseph Tamborski
Old Dominion University
631-790-1579
339 Oceanography & Physics Bldg
Norfolk
VA
23529
USA
jtambors@odu.edu
pointOfContact
Rene Maurice Boiteau
University of Minnesota
612-625-6983
228 Smith Hall 207 Pleasant Street Se
Minneapolis
MN
55455
USA
rboiteau@umn.edu
pointOfContact
Kristen Nicolle Buck
Oregon State University
541-737-7401
2651 SW Orchard Avenue CEOAS
Corvallis
OR
97331
USA
kristen.buck@oregonstate.edu
pointOfContact
Phoebe Dreux Chappell
University of South Florida
USF St. Petersburg campus 140 7th Ave. South
St. Petersburg
FL
33701
USA
dreux@usf.edu
pointOfContact
Timothy M. Conway
University of South Florida
727-258-1081
College of Marine Sciences 830 1st St SE
St. Petersburg
FL
33701
USA
tmconway@usf.edu
pointOfContact
Angela N. Knapp
Florida State University
(979) 862-5235
797 Lamar St. Dept of Oceanography, Eller O&M Room 1204
College Station
TX
77843
USA
aknapp@tamu.edu
pointOfContact
Chris Smith
United States Geological Survey
727-510-9884
600 4th St. S.
St. Petersburg
FL
33701
USA
cgsmith@usgs.gov
pointOfContact
Aaron Alorda-Kleinglass
Old Dominion University
akleingl@odu.edu
pointOfContact
asNeeded
Dataset Version: 1
Unknown
ISO_DateTime_Local
ISO_DateTime_UTC
Latitude
Longitude
Depth
Salinity
Internal_Temperature
Rn222
Rn222_flag
Rn222_err
Ship underway system
RAD7 radon-in-air monitors (Durridge Co.)
RAD8 radon-in-air monitors (Durridge Co.)
theme
None, User defined
ISO_DateTime_Local
ISO_DateTime_UTC
latitude
longitude
depth
salinity from CTD
temperature of sample or a generic measurement (not in-situ water temp)
radioactive_isotope_activity
flag
standard error
featureType
BCO-DMO Standard Parameters
Pump - Surface Underway Ship Intake
RAD-7 Radon Detector
RAD8 Radon Detector
instrument
BCO-DMO Standard Instruments
AE2305
service
Deployment Activity
Gulf of Mexico near Florida
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: Linking iron and nitrogen sources in an oligotrophic coastal margin: Nitrogen fixation and the role of boundary fluxes
https://osprey.bco-dmo.org/project/880516
Collaborative Research: Linking iron and nitrogen sources in an oligotrophic coastal margin: Nitrogen fixation and the role of boundary fluxes
<p><strong>NSF Award Abstract:</strong><br />
This project will investigate how groundwater discharge delivers important nutrients to the coastal ecosystems of the West Florida Shelf. Preliminary studies indicate that groundwater may supply both dissolved organic nitrogen (DON) and iron in this region. In coastal ecosystems like the West Florida Shelf that have very low nitrate and ammonium concentrations, DON is the main form of nitrogen available to organisms. Nitrogen cycling is strongly affected by iron availability because iron is essential for both photosynthesis and for nitrogen fixation. This study will investigate the sources and composition of DON and iron, and their influence on the coastal ecosystem. The team will sample offshore groundwater wells, river and estuarine waters, and conduct two expeditions across the West Florida Shelf in winter and summer. Investigators will participate in K-12 and outreach activities to increase awareness of the project and related science. The project will fund the work of six graduate and eight undergraduate students across five institutions, furthering NSF’s goals of education and training.</p>
<p>Motivated by preliminary observations of unexplained, tightly-correlated DON and dissolved iron concentrations across the West Florida Shelf (WFS), the proposed work will quantify the flux and isotopic signatures of submarine groundwater discharge (SGD)-derived DON and iron to the WFS, and evaluate the bioavailability of this temporally-variable source using four seasonal near-shore campaigns sampling offshore groundwater wells, estuarine, and riverine endmembers and two cross-shelf cruises. The work will evaluate whether SGD stimulates nitrogen fixation on the WFS, and the potential for the stimulated nitrogen fixation to further modify the chemistry of DON and dissolved iron in the region. The cross-shelf cruises will investigate hypothesized periods of maximum SGD and Trichodesmium abundance (June), and reduced river discharge and SGD (February), thus comparing two distinct biogeochemical regimes. The concentrations and isotopic compositions of DON and dissolved iron, molecular composition of DON, and the concentration and composition of iron-binding ligands will be characterized. Nitrogen fixation rates and Trichodesmium spp. abundance and expression of iron stress genes will be measured. Fluxes of DON and iron from SGD and rivers will be quantified with radium isotope mass balances. The impacts of SGD on nitrogen fixation and DON/ligand production will be constrained with incubations of natural phytoplankton communities with submarine groundwater amendments. Two hypotheses will be tested: 1) SGD is the dominant source of bioavailable DON and dissolved iron on the WFS, and 2) SGD-alleviation of iron stress changes the dominant Trichodesmium species on the WFS, increases nitrogen fixation rates and modifies DON and iron composition. Overall, the work will establish connections between marine nitrogen and iron cycling and evaluate the potential for coastal inputs to modify water along the WFS before export to the Atlantic Ocean. This study will thus provide a framework to consider these boundary fluxes in oligotrophic coastal systems and the relative importance of rivers and SGD as sources of nitrogen and iron in other analogous locations, such as coastal systems in Australia, India, and Africa, where nitrogen fixation and SGD have also been documented.</p>
<p>This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.</p>
West Florida Shelf DON and Fe
largerWorkCitation
project
eng; USA
oceans
Gulf of Mexico near Florida
-84.65471
-82.515386
26.720888
28.497172
2023-07-05
2023-07-12
Gulf of Mexico/America, West Florida Shelf
0
BCO-DMO catalogue of parameters from Specific activities of dissolved radon-222 collected from underway samples during STING II cruise EN704 on R/V Endeavor in the Gulf of Mexico in Jul 2023
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/988579.rdf
Name: ISO_DateTime_Local
Units: unitless
Description: <p>Date and time of sample collection, Eastern Time</p>
http://lod.bco-dmo.org/id/dataset-parameter/988580.rdf
Name: ISO_DateTime_UTC
Units: unitless
Description: <p>Date and time of sample collection, UTC</p>
http://lod.bco-dmo.org/id/dataset-parameter/988581.rdf
Name: Latitude
Units: decimal degrees
Description: <p>Latitude of sample collection</p>
http://lod.bco-dmo.org/id/dataset-parameter/988583.rdf
Name: Longitude
Units: decimal degrees
Description: <p>Longitude of sample collection</p>
http://lod.bco-dmo.org/id/dataset-parameter/988585.rdf
Name: Depth
Units: meters
Description: <p>Depth of sample collection</p>
http://lod.bco-dmo.org/id/dataset-parameter/988587.rdf
Name: Salinity
Units: psu
Description: <p>Salinity, measured underway</p>
http://lod.bco-dmo.org/id/dataset-parameter/988588.rdf
Name: Internal_Temperature
Units: degrees Celsius
Description: <p>Internal temperature of RAD7/8 instrument</p>
http://lod.bco-dmo.org/id/dataset-parameter/988589.rdf
Name: Rn222
Units: dpm/L
Description: <p>Rn-222 isotope specific activity, in-water</p>
http://lod.bco-dmo.org/id/dataset-parameter/988590.rdf
Name: Rn222_flag
Units: unitless
Description: <p>BDL = Indicates that the measurement is below detection limit</p>
http://lod.bco-dmo.org/id/dataset-parameter/988591.rdf
Name: Rn222_err
Units: dpm/L
Description: <p>Rn-222 isotope specific activity uncertainty, in-water</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
23255
https://darchive.mblwhoilibrary.org/server/api/core/bitstreams/a2b7a42a-5af4-461e-b74b-26751a353f36/content
download
https://doi.org/10.26008/1912/bco-dmo.988549.1
download
onLine
dataset
<p>Radon samples were collected and analyzed in two ways: as discrete grab samples and continuously from the ship’s underway system.&nbsp;This dataset contains the underway (continuous) measurements from July 2023. Discrete grab samples (including February and June/July collections) are provided in the related dataset.</p>
<p>For discrete radon-222 samples, six-liter seawater samples were collected into an 8 L Nalgene high density polyethylene jerrican (hereafter referred to as jerrican) with a three-port cap fitted with tubing, as described by Stringer and Burnett (2004). This approach is similar to the commercially available Big Bottle System (Big Bottle System Manual, 2018) but allows for a sufficient headspace volume of gas, to increase the total sample volume and thus a lower detection limit. Samples were immediately sealed with screw-compressor clamps on the tubing in two locations to prevent radon-222 loss from the headspace. All discrete radon-222 samples were analyzed within 48 hours of collection. Jerricans were connected either to a RAD8 or RAD7, both commercially available radon-in-air detectors (Durridge, Inc.). Detectors were initially purged with Drierite to reduce internal humidity to below 10% and background counts were recorded. Following Stringer and&nbsp;Burnett (2004), jerrican samples were degassed with the built-in air pump for 60 minutes in a closed-air loop. Samples were counted for a minimum of three hours (“Sniff” mode) to reach statistically significant counts. Following, sample volume was precisely measured using a graduated cylinder.</p>
<p>For underway radon-222 analyses, water was pumped into a showerhead gas equilibrator (RAD-AQUA, Durridge, Inc.) at a flow rate &gt; 2 liters min<sup>-1</sup> with a fifteen-minute counting interval, following Burnett et al. (2001).</p>
<p>For both discrete and underway measurements, data files were downloaded using CAPTURE software (Durridge, Inc.). Radon-in-air was calculated by dividing the total counts-per-minute (cpm; background corrected) in window-A by the RAD7/8 detector efficiency. For discrete samples, additional corrections were made as the ratio of total air volume (volume of tubing/drying column connector, jerrican, and chamber) to chamber air volume. For both discrete and underway measurements, in-situ seawater salinity was taken from the ship underway system or CTD (bottom waters), and temperature of the radon-222 sample from the internal air temperature of the RAD7/8 system. Radon-in-air to radon-in-water solubility corrections were made following Schubert et al. (2012), and samples were decay-corrected to the time of collection. Errors are propagated from counting statistics and detector efficiencies. Specific activities are reported as total radon-222 (supported from the in-situ decay of its parent Ra-226 plus excess radon-222).</p>
Specified by the Principal Investigator(s)
- Imported "BCO-DMO_STING-II_Radon_Underway_Dataset.csv" into the BCO-DMO system
- Converted "DateTime" into ISO 8601 format (YYYY-MM-DDTHH:MM) and renamed field to "ISO_DateTime_Local"
- Converted "ISO_DateTime_Local" to create a new field "ISO_DateTime_UTC" in UTC timezone
- Created a new field "Rn222_flag" and populated Rn222_flag = ‘BDL’ where Rn222 was below detection
- Removed "BDL" string from the "Rn222" and "Rn222_err" fields so that the fields can be typed as numbers
- Exported file as "988549_v1_sting_radon_underway.csv"
Specified by BCO-DMO Data Managers
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
Ship underway system
Ship underway system
PI Supplied Instrument Name: Ship underway system PI Supplied Instrument Description:Radon samples were collected and analyzed in two ways: as discrete grab samples and continuously from the ship underway system. 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/
RAD7 radon-in-air monitors (Durridge Co.)
RAD7 radon-in-air monitors (Durridge Co.)
PI Supplied Instrument Name: RAD7 radon-in-air monitors (Durridge Co.) PI Supplied Instrument Description:Jerricans were connected either to a RAD8 or RAD7, both commercially available radon-in-air detectors (Durridge, Inc.). The DURRIDGE RAD7 is a radon and thoron detector. The RAD7 is a computer-driven electronic detector, with pre-programmed set-ups for common tasks. It's built to withstand everyday use in the field. A rugged case encloses the detector, which is self-contained and self-sufficient. Instrument Name: RAD-7 Radon Detector Instrument Short Name:RAD7 Instrument Description: The DURRIDGE RAD7 is a radon and thoron detector. The RAD7 is a computer-driven electronic detector, with pre-programmed set-ups for common tasks. It's built to withstand everyday use in the field. A rugged case encloses the detector, which is self-contained and self-sufficient. The RAD7 comes with a built-in air pump, rechargeable batteries, and a wireless infrared printer. (https://durridge.com/products/rad7-radon-detector/)
RAD8 radon-in-air monitors (Durridge Co.)
RAD8 radon-in-air monitors (Durridge Co.)
PI Supplied Instrument Name: RAD8 radon-in-air monitors (Durridge Co.) PI Supplied Instrument Description:Jerricans were connected either to a RAD8 or RAD7, both commercially available radon-in-air detectors (Durridge, Inc.). The DURRIDGE RAD8 is a next-generation radon and thoron detector. The RAD8 is a computer-driven electronic detector, with pre-programmed set-ups for common tasks. It's built to withstand everyday use in the field. A rugged case encloses the detector, which is self-contained and self-sufficient. Instrument Name: RAD8 Radon Detector Instrument Short Name:RAD8 Instrument Description: The DURRIDGE RAD8 is a next-generation radon and thoron detector. The RAD8 is a computer-driven electronic detector, with pre-programmed set-ups for common tasks. It's built to withstand everyday use in the field. A rugged case encloses the detector, which is self-contained and self-sufficient. (https://durridge.com/products/rad8-radon-monitor/)
Cruise: AE2305
AE2305
R/V Atlantic Explorer
Community Standard Description
International Council for the Exploration of the Sea
R/V Atlantic Explorer
vessel
AE2305
Angela N. Knapp
Florida State University
R/V Atlantic Explorer
Community Standard Description
International Council for the Exploration of the Sea
R/V Atlantic Explorer
vessel