http://lod.bco-dmo.org/id/dataset/988607
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
2025-11-10
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
Dissolved long-lived radium isotopes for submarine groundwater samples collected from November 2022 and March 2024 along the West Florida Shelf
2026-04-03
publication
2026-04-03
revision
Woods Hole Oceanographic Institution (WHOI BCO-DMO)
2026-04-04
publication
https://doi.org/10.26008/1912/bco-dmo.988607.1
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., Boiteau, R. M., Buck, K. N., Chappell, P. D., Conway, T. M., Knapp, A. N., Smith, C. (2026) Dissolved long-lived radium isotopes for submarine groundwater samples collected from November 2022 and March 2024 along the West Florida Shelf. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2026-04-03 [if applicable, indicate subset used]. doi:10.26008/1912/bco-dmo.988607.1 [access date]
STING wells Ra Dataset Description: Methods and Sampling: <p>U.S. Geological Survey small boat operations along the West Florida Shelf were conducted quarterly from November 2022 to March 2024, for a total of six seasonal campaigns. Surface water (~20 L), bottom water (~20 L), and submarine groundwaters (1.4 – 2.2 L) were collected via peristaltic pump along three coastal transects after characterization using a calibrated handheld water quality sonde (YSI ProDSS; Chestang et al., 2025). Dissolved radium samples were filtered at &lt;1L/min onto a MnO<sub>2</sub>-coated acrylic fiber to adsorb Ra. Short-lived radium isotopes and water physicochemical parameters for the U.S. Geological Survey small boat operations were separately characterized (Chestang et al., 2025) and are not included in this report. The Mn-coated acrylic fibers were combusted at 850°C for 16 hours, homogenized, sealed with epoxy resin, and incubated for a minimum of three weeks until <sup>222</sup>Rn was in secular equilibrium with its parent <sup>226</sup>Ra. Long-lived Ra isotopes were measured via gamma spectroscopy in a Ge well-type detector for <sup>226</sup>Ra (352 keV photopeak) and <sup>228</sup>Ra (average of 338 and 911 keV photopeaks), with efficiencies calibrated using standards prepared in the same fashion as the estuarine samples in the related dataset (Charette et al., 2001).</p>
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
Trip_ID
Station
Type
STING_ID
DateTime
DateTime_local
Latitude
Longitude
Ra226
Ra226_BDL_flag
Ra226_err
Ra226_err_BDL_flag
Ra228
Ra228_BDL_flag
Ra228_err
Ra228_err_BDL_flag
gamma spectroscopy in a Ge well-type detector
homogenizer
handheld water quality sonde (YSI ProDSS)
Peristaltic pump
theme
None, User defined
cruise name
station
sample description
sample identification
ISO_DateTime_UTC
ISO_DateTime_Local
latitude
longitude
radium-226
quality flag
standard error
radium-228
featureType
BCO-DMO Standard Parameters
Gamma Ray Spectrometer
Homogenizer
Multi Parameter Portable Meter
Pump
instrument
BCO-DMO Standard Instruments
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
-82.8781
-82.41056
27.08939
29.09216
2022-11-14
2024-03-08
Gulf of Mexico/America, West Florida Shelf
0
BCO-DMO catalogue of parameters from Dissolved long-lived radium isotopes for submarine groundwater samples collected from November 2022 and March 2024 along the West Florida Shelf
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/995947.rdf
Name: Trip_ID
Units: unitless
Description: <p>ID code = YYWFS##; YY refers to year"; WFS = West Florida Shelf; ## refers to USGS St Petersburg Coastal and Marine Science Center trip number in that year"</p>
http://lod.bco-dmo.org/id/dataset-parameter/995948.rdf
Name: Station
Units: unitless
Description: <p>Station code. NC = Nature Coast; IRB = Indian Rocks Beach; VH = Venice Headlands. ## corresponds to a unique well station, for each site</p>
http://lod.bco-dmo.org/id/dataset-parameter/995949.rdf
Name: Type
Units: unitless
Description: <p>SW = surface water; BW = bottom water; GWd = deep groundwater well; GWs = shallow groundwater well</p>
http://lod.bco-dmo.org/id/dataset-parameter/995950.rdf
Name: STING_ID
Units: unitless
Description: <p>STING project sample ID</p>
http://lod.bco-dmo.org/id/dataset-parameter/995951.rdf
Name: DateTime
Units: unitless
Description: <p>DateTime sampled (UTC)</p>
http://lod.bco-dmo.org/id/dataset-parameter/995953.rdf
Name: DateTime_local
Units: unitless
Description: <p>DateTime sampled (ET)</p>
http://lod.bco-dmo.org/id/dataset-parameter/995954.rdf
Name: Latitude
Units: decimal degrees
Description: <p>Latitude of station</p>
http://lod.bco-dmo.org/id/dataset-parameter/995956.rdf
Name: Longitude
Units: decimal degrees
Description: <p>Longitude of station</p>
http://lod.bco-dmo.org/id/dataset-parameter/995958.rdf
Name: Ra226
Units: dpm/100L
Description: <p>Ra-226 isotope specific activity</p>
http://lod.bco-dmo.org/id/dataset-parameter/995959.rdf
Name: Ra226_BDL_flag
Units: unitless
Description: <p>Below detection limit (BDL) flag for Ra-226 isotope specific activity; 0=N/A 1=BDL</p>
http://lod.bco-dmo.org/id/dataset-parameter/995960.rdf
Name: Ra226_err
Units: dpm/100L
Description: <p>Ra-226 isotope specific activity uncertainty</p>
http://lod.bco-dmo.org/id/dataset-parameter/995961.rdf
Name: Ra226_err_BDL_flag
Units: unitless
Description: <p>Below detection limit (BDL) flag for Ra-226 isotope specific activity uncertainty; 0=N/A 1=BDL</p>
http://lod.bco-dmo.org/id/dataset-parameter/995962.rdf
Name: Ra228
Units: dpm/100L
Description: <p>Ra-228 isotope specific activity</p>
http://lod.bco-dmo.org/id/dataset-parameter/995963.rdf
Name: Ra228_BDL_flag
Units: unitless
Description: <p>Below detection limit (BDL) flag for Ra-228 isotope specific activity; 0=N/A 1=BDL</p>
http://lod.bco-dmo.org/id/dataset-parameter/995964.rdf
Name: Ra228_err
Units: dpm/100L
Description: <p>Ra-228 isotope specific activity uncertainty</p>
http://lod.bco-dmo.org/id/dataset-parameter/995965.rdf
Name: Ra228_err_BDL_flag
Units: unitless
Description: <p>Below detection limit (BDL) flag for Ra-228 isotope specific activity uncertainty; 0=N/A 1=BDL</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
https://doi.org/10.26008/1912/bco-dmo.988607.1
download
onLine
dataset
<p>U.S. Geological Survey small boat operations along the West Florida Shelf were conducted quarterly from November 2022 to March 2024, for a total of six seasonal campaigns. Surface water (~20 L), bottom water (~20 L), and submarine groundwaters (1.4 – 2.2 L) were collected via peristaltic pump along three coastal transects after characterization using a calibrated handheld water quality sonde (YSI ProDSS; Chestang et al., 2025). Dissolved radium samples were filtered at &lt;1L/min onto a MnO<sub>2</sub>-coated acrylic fiber to adsorb Ra. Short-lived radium isotopes and water physicochemical parameters for the U.S. Geological Survey small boat operations were separately characterized (Chestang et al., 2025) and are not included in this report. The Mn-coated acrylic fibers were combusted at 850°C for 16 hours, homogenized, sealed with epoxy resin, and incubated for a minimum of three weeks until <sup>222</sup>Rn was in secular equilibrium with its parent <sup>226</sup>Ra. Long-lived Ra isotopes were measured via gamma spectroscopy in a Ge well-type detector for <sup>226</sup>Ra (352 keV photopeak) and <sup>228</sup>Ra (average of 338 and 911 keV photopeaks), with efficiencies calibrated using standards prepared in the same fashion as the estuarine samples in the related dataset (Charette et al., 2001).</p>
Specified by the Principal Investigator(s)
- Loaded data from "BCO-DMO_STING_wells_LongLivedRadium.xlsx" (sheet 1, row 1 headers), treating "", "nd", and "NaN" as missing values
- Converted "DateTime" field to ISO 8601 datetime format ("%Y-%m-%dT%H:%M:%S") and renamed to DateTime_local
- Created new "DateTime" field in UTC in ISO 8601 format
- Exported file as "988607_v1_sting_wells_ra.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
gamma spectroscopy in a Ge well-type detector
gamma spectroscopy in a Ge well-type detector
PI Supplied Instrument Name: gamma spectroscopy in a Ge well-type detector PI Supplied Instrument Description:Long-lived Ra isotopes were measured via gamma spectroscopy in a Ge well-type detector for 226Ra (352 keV photopeak) and 228Ra (average of 338 and 911 keV photopeaks), with efficiencies calibrated using standards prepared in the same fashion as the estuarine samples (Charette et al., 2001).
Gamma detector made by Canberra. Instrument Name: Gamma Ray Spectrometer Instrument Short Name: Instrument Description: Instruments measuring the relative levels of electromagnetic radiation of different wavelengths in the gamma-ray waveband.
homogenizer
homogenizer
PI Supplied Instrument Name: homogenizer PI Supplied Instrument Description:The Mn-coated acrylic fibers were combusted at 850 °C for 16 hours, homogenized, sealed with epoxy resin, and incubated for a minimum of three weeks until 222Rn was in secular equilibrium with its parent 226Ra. Instrument Name: Homogenizer Instrument Short Name:Homogenizer Instrument Description: A homogenizer is a piece of laboratory equipment used for the homogenization of various types of material, such as tissue, plant, food, soil, and many others.
handheld water quality sonde (YSI ProDSS)
handheld water quality sonde (YSI ProDSS)
PI Supplied Instrument Name: handheld water quality sonde (YSI ProDSS) PI Supplied Instrument Description:U.S. Geological Survey small boat operations along the West Florida Shelf were conducted quarterly between November 2022 to March 2024, for a total of six seasonal campaigns. Surface water (~20 L), bottom water (~20 L), and submarine groundwaters (1.4 – 2.2 L) were collected via peristaltic pump along three coastal transects after characterization using a calibrated handheld water quality sonde (YSI ProDSS; Chestang et al., 2025). Instrument Name: Multi Parameter Portable Meter Instrument Short Name: Instrument Description: An analytical instrument that can measure multiple parameters, such as pH, EC, TDS, DO and temperature with one device and is portable or hand-held.
Peristaltic pump
Peristaltic pump
PI Supplied Instrument Name: Peristaltic pump PI Supplied Instrument Description:U.S. Geological Survey small boat operations along the West Florida Shelf were conducted quarterly between November 2022 to March 2024, for a total of six seasonal campaigns. Surface water (~20 L), bottom water (~20 L), and submarine groundwaters (1.4 – 2.2 L) were collected via peristaltic pump along three coastal transects after characterization using a calibrated handheld water quality sonde (YSI ProDSS; Chestang et al., 2025). Instrument Name: Pump Instrument Short Name: Instrument Description: A pump is a device that moves fluids (liquids or gases), or sometimes slurries, by mechanical action. Pumps can be classified into three major groups according to the method they use to move the fluid: direct lift, displacement, and gravity pumps