http://lod.bco-dmo.org/id/dataset/997813
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
2026-04-30
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
Concentrations of soluble and dissolved trace metals in water column samples and incubation experiments from STING I cruise AE2305 on R/V Atlantic Explorer over the West Florida Shelf from February to March 2023
2026-05-27
publication
2026-05-27
revision
BCO-DMO Linked Data URI
2026-05-27
creation
http://lod.bco-dmo.org/id/dataset/997813
Kristen Nicolle Buck
Oregon State University
principalInvestigator
Salvatore Caprara
Oregon State 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: Buck, K. N., Caprara, S. (2026) Concentrations of soluble and dissolved trace metals in water column samples and incubation experiments from STING I cruise AE2305 on R/V Atlantic Explorer over the West Florida Shelf from February to March 2023. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2026-05-27 [if applicable, indicate subset used]. http://lod.bco-dmo.org/id/dataset/997813 [access date]
STING I Dissolved Soluble Trace Metals Dataset Description: Methods and Sampling: <p><strong>Sample collection</strong></p>
<p>Water column samples were collected in February and March 2023 aboard the R/V Atlantic Explorer using a trace metal clean rosette (SeaBird) outfitted with 12-L Niskin-X samplers (Ocean Test Equipment), a trace metal clean pump, or a custom surface pump “towfish” system (Mellett and Buck, 2020). Seawater samples for dissolved (D) trace metal analysis were filtered through 0.2 µm Pall Acropak Super membrane filter capsules and collected in acid-cleaned and triple-rinsed 125-mL low density polyethylene (LDPE) bottles. A subset of dissolved trace metal samples was collected in fluorinated high-density polyethylene (FPE, Nalgene) bottles for subsequent ultrafiltration for soluble trace metal analysis. These samples were filtered through 0.02 µm Anodisc filter membranes (Cytiva Whatman) held in a Teflon filtration rig (Savillex) on a custom acrylic tower and collected in acid-cleaned and triple-rinsed 125-mL LDPE bottles. Unfiltered seawater samples for total dissolvable trace metal analysis were also collected in acid-cleaned and triple-rinsed 125-mL low density polyethylene (LDPE) bottles.</p>
<p>Samples from seawater incubation experiments were filtered through consecutive acid-cleaned 5 µm and 0.4 µm polycarbonate track-etched (PCTE, Whatman) filters in a dual stage Teflon filter rig (Savillex) on a custom acrylic tower. Filtrate from the 0.4 µm filters was collected in acid-cleaned and triple-rinsed 125-mL LDPE bottles for subsequent dissolved trace metal concentration measurements. The 5 µm and 0.4 µm filters were folded in eighths, placed in acid-cleaned snap-cap polypropylene centrifuge tubes, and frozen at -20 ºC for labile particulate metals.</p>
<p>All dissolved, soluble and total dissolvable trace metal samples were acidified shipboard with ultrapure hydrochloric acid (HCl, Optima) to 0.024 N HCl, double bagged in buckets and stored at room temperature until analyzed at Oregon State University (OSU).</p>
<p><strong>Analysis of dissolved and soluble trace metal concentrations</strong></p>
<p>Analysis of seawater samples for the concentrations of dissolved (&lt;0.2 µm or &lt;0.4 µm) and soluble (&lt;0.02 µm) trace metals, including aluminum (Al; dissolved only), scandium (Sc), manganese (Mn), iron (Fe), cobalt (Co), nickel (Ni), copper (Cu), zinc (Zn), cadmium (Cd), gadolinium (Gd), lutetium (Lu) and lead (Pb), were performed using an automated SeaFAST pico (Elemental Scientific, Inc.) in-line (Lagerström et al. 2013) with a Thermo Scientific iCAP-RQ Quadrupole CCT ICP-MS. This instrument is maintained at OSU in the Keck Collaboratory for Plasma Spectrometry.</p>
<p>Trace metals were eluted from the Nobias-1A resin in seaFAST using 10% nitric acid (Optima, Fisher) containing 1 ppb indium as an internal standard and quantified using nine-point calibration curves in filtered (&lt;0.2 µm) surface seawater collected offshore in the Gulf of Mexico in 2018 (Hollister et al. 2020) and stored unacidified in an acid-cleaned and double-bagged polypropylene in the dark; prior to use for the seawater matrix, a 2-L aliquot was pulled from the carboy and acidified to 0.024 N hydrochloric acid (HCl, Optima) to match the sample matrix. Subsamples of two in-house seawater quality control samples (collected previously from offshore surface waters, and from the EPZ GEOTRACES GP16 transect) were measured in each run and were also analyzed in tandem with community-established reference materials (SAFe-D1, SAFe-D2, GSC and NASS-7). All reference material results are provided&nbsp;in the supplemental document. Analytical blanks for the seaFAST method were obtained using air blanks, and limits of detection were calculated as three times the standard deviation of the averaged air blanks in each analytical run (Hollister et al. 2020).</p>
<p>Samples were analyzed a second time following the same procedure outlined above but after 90 minutes of UV-oxidation to ensure complete recovery of any organic-bound Cu and Co (Biller and Bruland 2012). The UV-oxidation was carried out on aliquots of samples in 15-mL Teflon vials (Savillex) with custom quartz lids (Hollister et al. 2020). For all elements except Cu and Co, results from analyses after UV-oxidation were combined with no UV results to achieve an additional analytical replicate.</p>
<p>Sample analyses for trace metals were performed by senior researcher Dr. Salvatore Caprara in the College of Earth, Ocean and Atmospheric Sciences at Oregon State University.</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-2326719 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=2326719
onGoing
Kristen Nicolle Buck
Oregon State University
541-737-7401
2651 SW Orchard Avenue CEOAS
Corvallis
OR
97331
USA
kristen.buck@oregonstate.edu
pointOfContact
Salvatore Caprara
Oregon State University
capraras@oregonstate.edu
pointOfContact
asNeeded
Dataset Version: 1
Unknown
STING_ID
CRUISE_ID
EVTNBR
DATETIME_UTC
DATE_UTC
TIME_UTC
DATETIME_EST
DATE_EST
TIME_EST
LATITUDE_SHIP
LONGITUDE_SHIP
PLATFORM
CASTNBR
STNNBR
LATITUDE_MAP
LONGITUDE_MAP
STN_MAP
BTLNBR
DEPTH
TREATMENT
TIMEPOINT
Al_D_CONC
Al_D_STDEV
Al_D_COUNT
Al_D_FLAG
Sc_D_CONC
Sc_D_STDEV
Sc_D_COUNT
Sc_D_FLAG
Mn_D_CONC
Mn_D_STDEV
Mn_D_COUNT
Mn_D_FLAG
Fe_D_CONC
Fe_D_STDEV
Fe_D_COUNT
Fe_D_FLAG
Co_D_UV_CONC
Co_D_UV_STDEV
Co_D_UV_COUNT
Co_D_UV_FLAG
Co_D_noUV_CONC
Co_D_noUV_STDEV
Co_D_noUV_COUNT
Co_D_noUV_FLAG
Ni_D_CONC
Ni_D_STDEV
Ni_D_COUNT
Ni_D_FLAG
Cu_D_UV_CONC
Cu_D_UV_STDEV
Cu_D_UV_COUNT
Cu_D_UV_FLAG
Cu_D_noUV_CONC
Cu_D_noUV_STDEV
Cu_D_noUV_COUNT
Cu_D_noUV_FLAG
Zn_D_CONC
Zn_D_STDEV
Zn_D_COUNT
Zn_D_FLAG
Cd_D_CONC
Cd_D_STDEV
Cd_D_COUNT
Cd_D_FLAG
Gd_D_CONC
Gd_D_STDEV
Gd_D_COUNT
Gd_D_FLAG
Lu_D_CONC
Lu_D_STDEV
Lu_D_COUNT
Lu_D_FLAG
Pb_D_CONC
Pb_D_STDEV
Pb_D_COUNT
Pb_D_FLAG
Sc_S_CONC
Sc_S_STDEV
Sc_S_COUNT
Sc_S_FLAG
Mn_S_CONC
Mn_S_STDEV
Mn_S_COUNT
Mn_S_FLAG
Fe_S_CONC
Fe_S_STDEV
Fe_S_COUNT
Fe_S_FLAG
Co_S_UV_CONC
Co_S_UV_STDEV
Co_S_UV_COUNT
Co_S_UV_FLAG
Co_S_noUV_CONC
Co_S_noUV_STDEV
Co_S_noUV_COUNT
Co_S_noUV_FLAG
Ni_S_CONC
Ni_S_STDEV
Ni_S_COUNT
Ni_S_FLAG
Cu_S_UV_CONC
Cu_S_UV_STDEV
Cu_S_UV_COUNT
Cu_S_UV_FLAG
Cu_S_noUV_CONC
Cu_S_noUV_STDEV
Cu_S_noUV_COUNT
Cu_S_noUV_FLAG
Zn_S_CONC
Zn_S_STDEV
Zn_S_COUNT
Zn_S_FLAG
Cd_S_CONC
Cd_S_STDEV
Cd_S_COUNT
Cd_S_FLAG
Gd_S_CONC
Gd_S_STDEV
Gd_S_COUNT
Gd_S_FLAG
Lu_S_CONC
Lu_S_STDEV
Lu_S_COUNT
Lu_S_FLAG
Pb_S_CONC
Pb_S_STDEV
Pb_S_COUNT
Pb_S_FLAG
trace metal clean rosette with a programmable autofire module (Seabird)
X-Niskin bottles
TM pump sampling system
iCAP-RQ Quadrupole CCT ICP-MS (Thermo Scientific)
SeaFAST pico (ESI)
towfish
theme
None, User defined
sample identification
Cruise identifier
event
ISO_DateTime_UTC
date
time of day
ISO_DateTime_Local
date_local
time_local
latitude
longitude
cast type
cast
station
bottle
depth
treatment
time_point
Aluminum
standard deviation
count
quality flag
Scandium
Manganese
Iron
Cobalt
Nickel
Copper
Zinc
Cadmium
Gadolinium (Gd)
Lutetium (Lu)
Lead
featureType
BCO-DMO Standard Parameters
CTD Sea-Bird 911
Niskin bottle
Pump
Quadrupole Mass Spectrometer
SeaFAST Automated Preconcentration System
towed unmanned submersible
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
-86.574
-82.581
26.334
28.497
2023-02-20
2023-03-05
Gulf of Mexico/America, West Florida Shelf
0
BCO-DMO catalogue of parameters from Concentrations of soluble and dissolved trace metals in water column samples and incubation experiments from STING I cruise AE2305 on R/V Atlantic Explorer over the West Florida Shelf from February to March 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/999495.rdf
Name: STING_ID
Units: unitless
Description: <p>Unique number assigned to each sampling event in STING project</p>
http://lod.bco-dmo.org/id/dataset-parameter/999496.rdf
Name: CRUISE_ID
Units: unitless
Description: <p>Research cruise identifier</p>
http://lod.bco-dmo.org/id/dataset-parameter/999497.rdf
Name: EVTNBR
Units: unitless
Description: <p>Event number; 'nda' for 'no data available' or missing information; 'na' for 'not applicable', used for incubation sampling events</p>
http://lod.bco-dmo.org/id/dataset-parameter/999498.rdf
Name: DATETIME_UTC
Units: unitless
Description: <p>UTC datetime when sample was collected</p>
http://lod.bco-dmo.org/id/dataset-parameter/1000214.rdf
Name: DATE_UTC
Units: unitless
Description: <p>UTC date when sample was collected</p>
http://lod.bco-dmo.org/id/dataset-parameter/1000215.rdf
Name: TIME_UTC
Units: unitless
Description: <p>UTC time when sample was collected; 'nda' for 'no data available' or missing information; 'na' for 'not applicable', used for incubation sampling events</p>
http://lod.bco-dmo.org/id/dataset-parameter/999500.rdf
Name: DATETIME_EST
Units: unitless
Description: <p>Local datetime, in Eastern Standard Time (EST) when sample was collected</p>
http://lod.bco-dmo.org/id/dataset-parameter/1000216.rdf
Name: DATE_EST
Units: unitless
Description: <p>Local date when sample was collected, Eastern Standard Time (EST)</p>
http://lod.bco-dmo.org/id/dataset-parameter/1000217.rdf
Name: TIME_EST
Units: unitless
Description: <p>Local time when sample was collected, Eastern Standard Time (EST); 'nda' for 'no data available' or missing information; 'na' for 'not applicable', used for incubation sampling events</p>
http://lod.bco-dmo.org/id/dataset-parameter/999501.rdf
Name: LATITUDE_SHIP
Units: decimal degrees
Description: <p>Ship position when sample was collected, positive is North; 'nda' for 'no data available' or missing information</p>
http://lod.bco-dmo.org/id/dataset-parameter/999503.rdf
Name: LONGITUDE_SHIP
Units: decimal degrees
Description: <p>Ship position when sample was collected, negative is West; 'nda' for 'no data available' or missing information</p>
http://lod.bco-dmo.org/id/dataset-parameter/999505.rdf
Name: PLATFORM
Units: unitless
Description: <p>Sampling system used; TMC CTD = trace metal CTD rosette; FISH = trace metal tow fish; TM PUMP = trace metal pump; INC = incubation</p>
http://lod.bco-dmo.org/id/dataset-parameter/999506.rdf
Name: CASTNBR
Units: unitless
Description: <p>Cast number; 'na' for 'not applicable', used for TM pump sampling events</p>
http://lod.bco-dmo.org/id/dataset-parameter/999507.rdf
Name: STNNBR
Units: unitless
Description: <p>Station number; 'na' for 'not applicable', used for incubation sampling events</p>
http://lod.bco-dmo.org/id/dataset-parameter/999508.rdf
Name: LATITUDE_MAP
Units: decimal degrees
Description: <p>Position of STN_MAP, positive is North; 'nda' for 'no data available' or missing information</p>
http://lod.bco-dmo.org/id/dataset-parameter/999509.rdf
Name: LONGITUDE_MAP
Units: decimal degrees
Description: <p>Position of STN_MAP, negative is West; 'nda' for 'no data available' or missing information</p>
http://lod.bco-dmo.org/id/dataset-parameter/999510.rdf
Name: STN_MAP
Units: unitless
Description: <p>Station number assigned retroactively to orient data to map and repeat sampling across field efforts; 'na' for 'not applicable', used for incubation sampling events</p>
http://lod.bco-dmo.org/id/dataset-parameter/999511.rdf
Name: BTLNBR
Units: unitless
Description: <p>CTD rosette bottle number for field samples, or incubation number for incubation samples; 'na' for 'not applicable' used for TM pump and FISH sampling</p>
http://lod.bco-dmo.org/id/dataset-parameter/999512.rdf
Name: DEPTH
Units: Meters (m)
Description: <p>Sample collection depth below sea surface; 'no data available' or missing information; 'na' for 'not applicable' to that sample</p>
http://lod.bco-dmo.org/id/dataset-parameter/999514.rdf
Name: TREATMENT
Units: unitless
Description: <p>Incubation treatment; 'na' for 'not applicable', used for non-incubation samples</p>
http://lod.bco-dmo.org/id/dataset-parameter/999515.rdf
Name: TIMEPOINT
Units: unitless
Description: <p>Incubation timepoint; 'na' for 'not applicable', used for non-incubation samples</p>
http://lod.bco-dmo.org/id/dataset-parameter/999516.rdf
Name: Al_D_CONC
Units: Nanomoles per liter (nM)
Description: <p>Concentrations of dissolved (<0.2 or 0.4 µm) aluminum (Al) in project samples. 'na' for 'not applicable' used when no sample was collected for this parameter</p>
http://lod.bco-dmo.org/id/dataset-parameter/999517.rdf
Name: Al_D_STDEV
Units: Nanomoles per liter (nM)
Description: <p>Standard deviation of replicate dissolved aluminum (Al) measurements. If only 2 replicates, the difference about the mean was used to calculate error. 'na' for 'not applicable' used when no error estimates calculated for this parameter</p>
http://lod.bco-dmo.org/id/dataset-parameter/999518.rdf
Name: Al_D_COUNT
Units: unitless
Description: <p>Number of analyses used for Al_D_Conc. 'na' for 'not applicable' used when no sample was collected for this parameter</p>
http://lod.bco-dmo.org/id/dataset-parameter/999519.rdf
Name: Al_D_FLAG
Units: unitless
Description: <p>Quality flag for Al_D_CONC</p>
http://lod.bco-dmo.org/id/dataset-parameter/999520.rdf
Name: Sc_D_CONC
Units: Picomoles per liter (pM)
Description: <p>Concentrations of dissolved (<0.2 or 0.4 µm) scandium (Sc) in project samples. 'na' for 'not applicable' used when no sample was collected for this parameter</p>
http://lod.bco-dmo.org/id/dataset-parameter/999521.rdf
Name: Sc_D_STDEV
Units: Picomoles per liter (pM)
Description: <p>Standard deviation of replicate dissolved scandium (Sc) measurements. If only 2 replicates, the difference about the mean was used to calculate error. 'na' for 'not applicable' used when no error estimates calculated for this parameter</p>
http://lod.bco-dmo.org/id/dataset-parameter/999522.rdf
Name: Sc_D_COUNT
Units: unitless
Description: <p>Number of analyses used for Sc_D_Conc. 'na' for 'not applicable' used when no sample was collected for this parameter</p>
http://lod.bco-dmo.org/id/dataset-parameter/999523.rdf
Name: Sc_D_FLAG
Units: unitless
Description: <p>Quality flag for Sc_D_CONC</p>
http://lod.bco-dmo.org/id/dataset-parameter/999524.rdf
Name: Mn_D_CONC
Units: Nanomoles per liter (nmol/L)
Description: <p>Concentrations of dissolved (<0.2 or 0.4 µm) manganese (Mn) in project samples. 'na' for 'not applicable' used when no sample was collected for this parameter</p>
http://lod.bco-dmo.org/id/dataset-parameter/999525.rdf
Name: Mn_D_STDEV
Units: Nanomoles per liter (nmol/L)
Description: <p>Standard deviation of replicate dissolved manganese (Mn) measurements. If only 2 replicates, the difference about the mean was used to calculate error. 'na' for 'not applicable' used when no error estimates calculated for this parameter</p>
http://lod.bco-dmo.org/id/dataset-parameter/999526.rdf
Name: Mn_D_COUNT
Units: unitless
Description: <p>Number of analyses used for Mn_D_Conc. 'na' for 'not applicable' used when no sample was collected for this parameter</p>
http://lod.bco-dmo.org/id/dataset-parameter/999527.rdf
Name: Mn_D_FLAG
Units: unitless
Description: <p>Quality flag for Mn_D_CONC</p>
http://lod.bco-dmo.org/id/dataset-parameter/999528.rdf
Name: Fe_D_CONC
Units: Nanomoles per liter (nmol/L)
Description: <p>Concentrations of dissolved (<0.2 or 0.4 µm) iron (Fe) in project samples. 'na' for 'not applicable' used when no sample was collected for this parameter</p>
http://lod.bco-dmo.org/id/dataset-parameter/999529.rdf
Name: Fe_D_STDEV
Units: Nanomoles per liter (nmol/L)
Description: <p>Standard deviation of replicate dissolved iron (Fe) measurements. If only 2 replicates, the difference about the mean was used to calculate error. 'na' for 'not applicable' used when no error estimates calculated for this parameter</p>
http://lod.bco-dmo.org/id/dataset-parameter/999530.rdf
Name: Fe_D_COUNT
Units: unitless
Description: <p>Number of analyses used for Fe_D_Conc. 'na' for 'not applicable' used when no sample was collected for this parameter</p>
http://lod.bco-dmo.org/id/dataset-parameter/999531.rdf
Name: Fe_D_FLAG
Units: unitless
Description: <p>Quality flag for Fe_D_CONC</p>
http://lod.bco-dmo.org/id/dataset-parameter/999532.rdf
Name: Co_D_UV_CONC
Units: Picomoles per liter (pmol/L)
Description: <p>Concentrations of dissolved (<0.2 or 0.4 µm) cobalt (Co) in project samples, measured after UV-oxidation. 'na' for 'not applicable'used when no sample was collected for this parameter</p>
http://lod.bco-dmo.org/id/dataset-parameter/999533.rdf
Name: Co_D_UV_STDEV
Units: Picomoles per liter (pmol/L)
Description: <p>Standard deviation of replicate dissolved cobalt (Co) measurements in samples that were UV-oxidized. If only 2 replicates, the difference about the mean was used to calculate error. 'na' for 'not applicable' used when no error estimates calculated for this parameter</p>
http://lod.bco-dmo.org/id/dataset-parameter/999534.rdf
Name: Co_D_UV_COUNT
Units: unitless
Description: <p>Number of analyses used for Co_D_UV_Conc. 'na' for 'not applicable' used when no sample was collected for this parameter</p>
http://lod.bco-dmo.org/id/dataset-parameter/999535.rdf
Name: Co_D_UV_FLAG
Units: unitless
Description: <p>Quality flag for Co_D_UV_CONC</p>
http://lod.bco-dmo.org/id/dataset-parameter/999536.rdf
Name: Co_D_noUV_CONC
Units: Picomoles per liter (pmol/L)
Description: <p>Concentrations of dissolved (<0.2 or 0.4 µm) cobalt (Co) in project samples; samples were not UV-oxidized prior to measurement. 'na' for 'not applicable' used when no sample was collected for this parameter</p>
http://lod.bco-dmo.org/id/dataset-parameter/999537.rdf
Name: Co_D_noUV_STDEV
Units: Picomoles per liter (pmol/L)
Description: <p>Standard deviation of replicate dissolved cobalt (Co) measurements in samples that were not UV-oxidized. If only 2 replicates, the difference about the mean was used to calculate error. 'na' for 'not applicable' used when no error estimates calculated for this parameter</p>
http://lod.bco-dmo.org/id/dataset-parameter/999538.rdf
Name: Co_D_noUV_COUNT
Units: unitless
Description: <p>Number of analyses used for Co_D_noUV_Conc. 'na' for 'not applicable' used when no sample was collected for this parameter</p>
http://lod.bco-dmo.org/id/dataset-parameter/999539.rdf
Name: Co_D_noUV_FLAG
Units: unitless
Description: <p>Quality flag for Co_D_noUV_CONC</p>
http://lod.bco-dmo.org/id/dataset-parameter/999540.rdf
Name: Ni_D_CONC
Units: Nanomoles per liter (nmol/L)
Description: <p>Concentrations of dissolved (<0.2 or 0.4 µm) nickel (Ni) in project samples. 'na' for 'not applicable' used when no sample was collected for this parameter</p>
http://lod.bco-dmo.org/id/dataset-parameter/999541.rdf
Name: Ni_D_STDEV
Units: Nanomoles per liter (nmol/L)
Description: <p>Standard deviation of replicate dissolved nickel (Ni) measurements. If only 2 replicates, the difference about the mean was used to calculate error. 'na' for 'not applicable' used when no error estimates calculated for this parameter</p>
http://lod.bco-dmo.org/id/dataset-parameter/999542.rdf
Name: Ni_D_COUNT
Units: unitless
Description: <p>Number of analyses used for Ni_D_Conc. 'na' for 'not applicable' used when no sample was collected for this parameter</p>
http://lod.bco-dmo.org/id/dataset-parameter/999543.rdf
Name: Ni_D_FLAG
Units: unitless
Description: <p>Quality flag for Ni_D_CONC</p>
http://lod.bco-dmo.org/id/dataset-parameter/999544.rdf
Name: Cu_D_UV_CONC
Units: Nanomoles per liter (nmol/L)
Description: <p>Concentrations of dissolved (<0.2 or 0.4 µm) copper (Cu) in project samples, measured after UV-oxidation. 'na' for 'not applicable' used when no sample was collected for this parameter</p>
http://lod.bco-dmo.org/id/dataset-parameter/999545.rdf
Name: Cu_D_UV_STDEV
Units: Nanomoles per liter (nmol/L)
Description: <p>Standard deviation of replicate dissolved cobalt (Cu) measurements in samples that were UV-oxidized. If only 2 replicates, the difference about the mean was used to calculate error. 'na' for 'not applicable' used when no error estimates calculated for this parameter</p>
http://lod.bco-dmo.org/id/dataset-parameter/999546.rdf
Name: Cu_D_UV_COUNT
Units: unitless
Description: <p>Number of analyses used for Cu_D_UV_Conc. 'na' for 'not applicable' used when no sample was collected for this parameter</p>
http://lod.bco-dmo.org/id/dataset-parameter/999547.rdf
Name: Cu_D_UV_FLAG
Units: unitless
Description: <p>Quality flag for Cu_D_UV_CONC</p>
http://lod.bco-dmo.org/id/dataset-parameter/999548.rdf
Name: Cu_D_noUV_CONC
Units: Nanomoles per liter (nmol/L)
Description: <p>Concentrations of dissolved (<0.2 or 0.4 µm) copper (Cu) in project samples; samples were not UV-oxidized prior to measurement. 'na' for 'not applicable' used when no sample was collected for this parameter</p>
http://lod.bco-dmo.org/id/dataset-parameter/999549.rdf
Name: Cu_D_noUV_STDEV
Units: Nanomoles per liter (nmol/L)
Description: <p>Standard deviation of replicate dissolved copper (Cu) measurements in samples that were not UV-oxidized. If only 2 replicates, the difference about the mean was used to calculate error. 'na' for 'not applicable' used when no error estimates calculated for this parameter</p>
http://lod.bco-dmo.org/id/dataset-parameter/999550.rdf
Name: Cu_D_noUV_COUNT
Units: unitless
Description: <p>Number of analyses used for Cu_D_noUV_Conc. 'na' for 'not applicable' used when no sample was collected for this parameter</p>
http://lod.bco-dmo.org/id/dataset-parameter/999551.rdf
Name: Cu_D_noUV_FLAG
Units: unitless
Description: <p>Quality flag for Cu_D_noUV_CONC</p>
http://lod.bco-dmo.org/id/dataset-parameter/999552.rdf
Name: Zn_D_CONC
Units: Nanomoles per liter (nmol/L)
Description: <p>Concentrations of dissolved (<0.2 or 0.4 µm) zinc (Zn) in project samples. 'na' for 'not applicable' used when no sample was collected for this parameter</p>
http://lod.bco-dmo.org/id/dataset-parameter/999553.rdf
Name: Zn_D_STDEV
Units: Nanomoles per liter (nmol/L)
Description: <p>Standard deviation of replicate dissolved zinc (Zn) measurements. If only 2 replicates, the difference about the mean was used to calculate error. 'na' for 'not applicable' used when no error estimates calculated for this parameter</p>
http://lod.bco-dmo.org/id/dataset-parameter/999554.rdf
Name: Zn_D_COUNT
Units: unitless
Description: <p>Number of analyses used for Zn_D_Conc. 'na' for 'not applicable' used when no sample was collected for this parameter</p>
http://lod.bco-dmo.org/id/dataset-parameter/999555.rdf
Name: Zn_D_FLAG
Units: unitless
Description: <p>Quality flag for Zn_D_CONC</p>
http://lod.bco-dmo.org/id/dataset-parameter/999556.rdf
Name: Cd_D_CONC
Units: Picomoles per liter (pmol/L)
Description: <p>Concentrations of dissolved (<0.2 or 0.4 µm) cadmium (Cd) in project samples. 'na' for 'not applicable' used when no sample was collected for this parameter</p>
http://lod.bco-dmo.org/id/dataset-parameter/999557.rdf
Name: Cd_D_STDEV
Units: Picomoles per liter (pmol/L)
Description: <p>Standard deviation of replicate dissolved cadmium (Cd) measurements. If only 2 replicates, the difference about the mean was used to calculate error. 'na' for 'not applicable' used when no error estimates calculated for this parameter</p>
http://lod.bco-dmo.org/id/dataset-parameter/999558.rdf
Name: Cd_D_COUNT
Units: unitless
Description: <p>Number of analyses used for Cd_D_Conc. 'na' for 'not applicable' used when no sample was collected for this parameter</p>
http://lod.bco-dmo.org/id/dataset-parameter/999559.rdf
Name: Cd_D_FLAG
Units: unitless
Description: <p>Quality flag for Cd_D_CONC</p>
http://lod.bco-dmo.org/id/dataset-parameter/999560.rdf
Name: Gd_D_CONC
Units: Picomoles per liter (pmol/L)
Description: <p>Concentrations of dissolved (<0.2 or 0.4 µm) gadolinium (Gd) in project samples. 'na' for 'not applicable' used when no sample was collected for this parameter</p>
http://lod.bco-dmo.org/id/dataset-parameter/999561.rdf
Name: Gd_D_STDEV
Units: Picomoles per liter (pmol/L)
Description: <p>Standard deviation of replicate dissolved gadolinium (Gd) measurements. If only 2 replicates, the difference about the mean was used to calculate error. 'na' for 'not applicable' used when no error estimates calculated for this parameter</p>
http://lod.bco-dmo.org/id/dataset-parameter/999562.rdf
Name: Gd_D_COUNT
Units: unitless
Description: <p>Number of analyses used for Gd_D_Conc. 'na' for 'not applicable' used when no sample was collected for this parameter</p>
http://lod.bco-dmo.org/id/dataset-parameter/999563.rdf
Name: Gd_D_FLAG
Units: unitless
Description: <p>Quality flag for Gd_D_CONC</p>
http://lod.bco-dmo.org/id/dataset-parameter/999564.rdf
Name: Lu_D_CONC
Units: Picomoles per liter (pmol/L)
Description: <p>Concentrations of dissolved (<0.2 or 0.4 µm) lutetium (Lu) in project samples. 'na' for 'not applicable' used when no sample was collected for this parameter</p>
http://lod.bco-dmo.org/id/dataset-parameter/999565.rdf
Name: Lu_D_STDEV
Units: Picomoles per liter (pmol/L)
Description: <p>Standard deviation of replicate dissolved lutetium (Lu) measurements. If only 2 replicates, the difference about the mean was used to calculate error. 'na' for 'not applicable' used when no error estimates calculated for this parameter</p>
http://lod.bco-dmo.org/id/dataset-parameter/999566.rdf
Name: Lu_D_COUNT
Units: unitless
Description: <p>Number of analyses used for Lu_D_Conc. 'na' for 'not applicable' used when no sample was collected for this parameter</p>
http://lod.bco-dmo.org/id/dataset-parameter/999567.rdf
Name: Lu_D_FLAG
Units: unitless
Description: <p>Quality flag for Lu_D_CONC</p>
http://lod.bco-dmo.org/id/dataset-parameter/999568.rdf
Name: Pb_D_CONC
Units: Picomoles per liter (pmol/L)
Description: <p>Concentrations of dissolved (<0.2 or 0.4 µm) lead (Pb) in project samples. 'na' for 'not applicable' used when no sample was collected for this parameter.</p>
http://lod.bco-dmo.org/id/dataset-parameter/999569.rdf
Name: Pb_D_STDEV
Units: Picomoles per liter (pmol/L)
Description: <p>Standard deviation of replicate dissolved lead (Pb) measurements. If only 2 replicates, the difference about the mean was used to calculate error. 'na' for 'not applicable' used when no error estimates calculated for this parameter</p>
http://lod.bco-dmo.org/id/dataset-parameter/999570.rdf
Name: Pb_D_COUNT
Units: unitless
Description: <p>Number of analyses used for Pb_D_Conc. 'na' for 'not applicable' used when no sample was collected for this parameter</p>
http://lod.bco-dmo.org/id/dataset-parameter/999571.rdf
Name: Pb_D_FLAG
Units: unitless
Description: <p>Quality flag for Pb_D_CONC</p>
http://lod.bco-dmo.org/id/dataset-parameter/999572.rdf
Name: Sc_S_CONC
Units: Picomoles per liter (pM)
Description: <p>Concentrations of soluble (<0.02 µm) scandium (Sc) in project samples. 'na' for 'not applicable' used when no sample was collected for this parameter</p>
http://lod.bco-dmo.org/id/dataset-parameter/999573.rdf
Name: Sc_S_STDEV
Units: Picomoles per liter (pM)
Description: <p>Standard deviation of replicate soluble scandium (Sc) measurements. If only 2 replicates, the difference about the mean was used to calculate error. 'na' for 'not applicable' used when no error estimates calculated for this parameter</p>
http://lod.bco-dmo.org/id/dataset-parameter/999574.rdf
Name: Sc_S_COUNT
Units: unitless
Description: <p>Number of analyses used for Sc_S_Conc. 'na' for 'not applicable' used when no sample was collected for this parameter</p>
http://lod.bco-dmo.org/id/dataset-parameter/999575.rdf
Name: Sc_S_FLAG
Units: unitless
Description: <p>Quality flag for Sc_S_CONC</p>
http://lod.bco-dmo.org/id/dataset-parameter/999576.rdf
Name: Mn_S_CONC
Units: Nanomoles per liter (nmol/L)
Description: <p>Concentrations of soluble (<0.02 µm) manganese (Mn) in project samples. 'na' for 'not applicable' used when no sample was collected for this parameter</p>
http://lod.bco-dmo.org/id/dataset-parameter/999577.rdf
Name: Mn_S_STDEV
Units: Nanomoles per liter (nmol/L)
Description: <p>Standard deviation of replicate soluble manganese (Mn) measurements. If only 2 replicates, the difference about the mean was used to calculate error. 'na' for 'not applicable' used when no error estimates calculated for this parameter</p>
http://lod.bco-dmo.org/id/dataset-parameter/999578.rdf
Name: Mn_S_COUNT
Units: unitless
Description: <p>Number of analyses used for Mn_S_CONC</p>
http://lod.bco-dmo.org/id/dataset-parameter/999579.rdf
Name: Mn_S_FLAG
Units: unitless
Description: <p>Quality flag for Mn_S_CONC</p>
http://lod.bco-dmo.org/id/dataset-parameter/999580.rdf
Name: Fe_S_CONC
Units: Nanomoles per liter (nmol/L)
Description: <p>Concentrations of soluble (<0.02 µm) iron (Fe) in project samples. 'na' for 'not applicable' used when no sample was collected for this parameter</p>
http://lod.bco-dmo.org/id/dataset-parameter/999581.rdf
Name: Fe_S_STDEV
Units: Nanomoles per liter (nmol/L)
Description: <p>Standard deviation of replicate soluble iron (Fe) measurements. If only 2 replicates, the difference about the mean was used to calculate error. 'na' for 'not applicable' used when no error estimates calculated for this parameter</p>
http://lod.bco-dmo.org/id/dataset-parameter/999582.rdf
Name: Fe_S_COUNT
Units: unitless
Description: <p>Number of analyses used for Fe_S_Conc. 'na' for 'not applicable' used when no sample was collected for this parameter</p>
http://lod.bco-dmo.org/id/dataset-parameter/999583.rdf
Name: Fe_S_FLAG
Units: unitless
Description: <p>Quality flag for Fe_S_CONC</p>
http://lod.bco-dmo.org/id/dataset-parameter/999584.rdf
Name: Co_S_UV_CONC
Units: Picomoles per liter (pmol/L)
Description: <p>Concentrations of soluble (<0.02 µm) cobalt (Co) in project samples, measured after UV-oxidation. 'na' for 'not applicable' used when no sample was collected for this parameter. 'nda' for 'no data available' used when sample not analyzed for this parameter</p>
http://lod.bco-dmo.org/id/dataset-parameter/999585.rdf
Name: Co_S_UV_STDEV
Units: Picomoles per liter (pmol/L)
Description: <p>Standard deviation of replicate soluble cobalt (Co) measurements in samples that were UV-oxidized. If only 2 replicates, the difference about the mean was used to calculate error. 'na' for 'not applicable' used when no error estimates calculated for this parameter</p>
http://lod.bco-dmo.org/id/dataset-parameter/999586.rdf
Name: Co_S_UV_COUNT
Units: unitless
Description: <p>Number of analyses used for Co_S_UV_Conc. 'na' for 'not applicable' used when no sample was collected for this parameter</p>
http://lod.bco-dmo.org/id/dataset-parameter/999587.rdf
Name: Co_S_UV_FLAG
Units: unitless
Description: <p>Quality flag for Co_S_UV_CONC</p>
http://lod.bco-dmo.org/id/dataset-parameter/999588.rdf
Name: Co_S_noUV_CONC
Units: Picomoles per liter (pmol/L)
Description: <p>Concentrations of soluble (<0.02 µm) cobalt (Co) in project samples; samples were not UV-oxidized prior to measurement. 'na' for 'not applicable' used when no sample was collected for this parameter</p>
http://lod.bco-dmo.org/id/dataset-parameter/999589.rdf
Name: Co_S_noUV_STDEV
Units: Picomoles per liter (pmol/L)
Description: <p>Standard deviation of replicate soluble cobalt (Co) measurements in samples that were not UV-oxidized. If only 2 replicates, the difference about the mean was used to calculate error. 'na' for 'not applicable' used when no error estimates calculated for this parameter</p>
http://lod.bco-dmo.org/id/dataset-parameter/999590.rdf
Name: Co_S_noUV_COUNT
Units: unitless
Description: <p>Number of analyses used for Co_S_noUV_Conc. 'na' for 'not applicable' used when no sample was collected for this parameter</p>
http://lod.bco-dmo.org/id/dataset-parameter/999591.rdf
Name: Co_S_noUV_FLAG
Units: unitless
Description: <p>Quality flag for Co_S_noUV_CONC</p>
http://lod.bco-dmo.org/id/dataset-parameter/999592.rdf
Name: Ni_S_CONC
Units: Nanomoles per liter (nmol/L)
Description: <p>Concentrations of soluble (<0.02 µm) nickel (Ni) in project samples. 'na' for 'not applicable' used when no sample was collected for this parameter</p>
http://lod.bco-dmo.org/id/dataset-parameter/999593.rdf
Name: Ni_S_STDEV
Units: Nanomoles per liter (nmol/L)
Description: <p>Standard deviation of replicate soluble nickel (Ni) measurements. If only 2 replicates, the difference about the mean was used to calculate error. 'na' for 'not applicable' used when no error estimates calculated for this parameter</p>
http://lod.bco-dmo.org/id/dataset-parameter/999594.rdf
Name: Ni_S_COUNT
Units: unitless
Description: <p>Number of analyses used for Ni_S_Conc. 'na' for 'not applicable' used when no sample was collected for this parameter</p>
http://lod.bco-dmo.org/id/dataset-parameter/999595.rdf
Name: Ni_S_FLAG
Units: unitless
Description: <p>Quality flag for Ni_S_CONC</p>
http://lod.bco-dmo.org/id/dataset-parameter/999596.rdf
Name: Cu_S_UV_CONC
Units: Nanomoles per liter (nmol/L)
Description: <p>Concentrations of soluble (<0.02 µm) copper (Cu) in project samples, measured after UV-oxidation. 'na' for 'not applicable' used when no sample was collected for this parameter. 'nda' for 'no data available' used when sample not analyzed for this parameter</p>
http://lod.bco-dmo.org/id/dataset-parameter/999597.rdf
Name: Cu_S_UV_STDEV
Units: Nanomoles per liter (nmol/L)
Description: <p>Standard deviation of replicate soluble copper (Cu) measurements in samples that were UV-oxidized. If only 2 replicates, the difference about the mean was used to calculate error. 'na' for 'not applicable' used when no error estimates calculated for this parameter</p>
http://lod.bco-dmo.org/id/dataset-parameter/999598.rdf
Name: Cu_S_UV_COUNT
Units: unitless
Description: <p>Number of analyses used for Cu_S_UV_Conc. 'na' for 'not applicable' used when no sample was collected for this parameter</p>
http://lod.bco-dmo.org/id/dataset-parameter/999599.rdf
Name: Cu_S_UV_FLAG
Units: unitless
Description: <p>Quality flag for Cu_S_UV_CONC</p>
http://lod.bco-dmo.org/id/dataset-parameter/999600.rdf
Name: Cu_S_noUV_CONC
Units: Nanomoles per liter (nmol/L)
Description: <p>Concentrations of soluble (<0.02 µm) copper (Cu) in project samples; samples were not UV-oxidized prior to measurement. 'na' for 'not applicable' used when no sample was collected for this parameter</p>
http://lod.bco-dmo.org/id/dataset-parameter/999601.rdf
Name: Cu_S_noUV_STDEV
Units: Nanomoles per liter (nmol/L)
Description: <p>Standard deviation of replicate soluble copper (Cu) measurements in samples that were not UV-oxidized. If only 2 replicates, the difference about the mean was used to calculate error. 'na' for 'not applicable' used when no error estimates calculated for this parameter</p>
http://lod.bco-dmo.org/id/dataset-parameter/999602.rdf
Name: Cu_S_noUV_COUNT
Units: unitless
Description: <p>Number of analyses used for Cu_S_noUV_Conc. 'na' for 'not applicable' used when no sample was collected for this parameter</p>
http://lod.bco-dmo.org/id/dataset-parameter/999603.rdf
Name: Cu_S_noUV_FLAG
Units: unitless
Description: <p>Quality flag for Cu_S_noUV_CONC</p>
http://lod.bco-dmo.org/id/dataset-parameter/999604.rdf
Name: Zn_S_CONC
Units: Nanomoles per liter (nmol/L)
Description: <p>Concentrations of soluble (<0.02 µm) zinc (Zn) in project samples. 'na' for 'not applicable' used when no sample was collected for this parameter</p>
http://lod.bco-dmo.org/id/dataset-parameter/999605.rdf
Name: Zn_S_STDEV
Units: Nanomoles per liter (nmol/L)
Description: <p>Standard deviation of replicate soluble zinc (Zn) measurements. If only 2 replicates, the difference about the mean was used to calculate error. 'na' for 'not applicable' used when no error estimates calculated for this parameter</p>
http://lod.bco-dmo.org/id/dataset-parameter/999606.rdf
Name: Zn_S_COUNT
Units: unitless
Description: <p>Number of analyses used for Zn_S_Conc. 'na' for 'not applicable' used when no sample was collected for this parameter</p>
http://lod.bco-dmo.org/id/dataset-parameter/999607.rdf
Name: Zn_S_FLAG
Units: unitless
Description: <p>Quality flag for Zn_S_CONC</p>
http://lod.bco-dmo.org/id/dataset-parameter/999608.rdf
Name: Cd_S_CONC
Units: Picomoles per liter (pmol/L)
Description: <p>Concentrations of soluble (<0.02 µm) cadmium (Cd) in project samples. 'na' for 'not applicable' used when no sample was collected for this parameter</p>
http://lod.bco-dmo.org/id/dataset-parameter/999609.rdf
Name: Cd_S_STDEV
Units: Picomoles per liter (pmol/L)
Description: <p>Standard deviation of replicate soluble cadmium (Cd) measurements. If only 2 replicates, the difference about the mean was used to calculate error. 'na' for 'not applicable' used when no error estimates calculated for this parameter</p>
http://lod.bco-dmo.org/id/dataset-parameter/999610.rdf
Name: Cd_S_COUNT
Units: unitless
Description: <p>Number of analyses used for Cd_S_Conc. 'na' for 'not applicable' used when no sample was collected for this parameter</p>
http://lod.bco-dmo.org/id/dataset-parameter/999611.rdf
Name: Cd_S_FLAG
Units: unitless
Description: <p>Quality flag for Cd_S_CONC.</p>
http://lod.bco-dmo.org/id/dataset-parameter/999612.rdf
Name: Gd_S_CONC
Units: Picomoles per liter (pmol/L)
Description: <p>Concentrations of soluble (<0.02 µm) gadolinium (Gd) in project samples. 'na' for 'not applicable' used when no sample was collected for this parameter</p>
http://lod.bco-dmo.org/id/dataset-parameter/999613.rdf
Name: Gd_S_STDEV
Units: Picomoles per liter (pmol/L)
Description: <p>Standard deviation of replicate soluble gadolinium (Gd) measurements. If only 2 replicates, the difference about the mean was used to calculate error. 'na' for 'not applicable' used when no error estimates calculated for this parameter</p>
http://lod.bco-dmo.org/id/dataset-parameter/999614.rdf
Name: Gd_S_COUNT
Units: unitless
Description: <p>Number of analyses used for Gd_S_Conc. 'na' for 'not applicable' used when no sample was collected for this parameter</p>
http://lod.bco-dmo.org/id/dataset-parameter/999615.rdf
Name: Gd_S_FLAG
Units: unitless
Description: <p>Quality flag for Gd_S_CONC</p>
http://lod.bco-dmo.org/id/dataset-parameter/999616.rdf
Name: Lu_S_CONC
Units: Picomoles per liter (pmol/L)
Description: <p>Concentrations of soluble (<0.02 µm) lutetium (Lu) in project samples. 'na' for 'not applicable' used when no sample was collected for this parameter</p>
http://lod.bco-dmo.org/id/dataset-parameter/999617.rdf
Name: Lu_S_STDEV
Units: Picomoles per liter (pmol/L)
Description: <p>Standard deviation of replicate soluble lutetium (Lu) measurements. If only 2 replicates, the difference about the mean was used to calculate error. 'na' for 'not applicable' used when no error estimates calculated for this parameter</p>
http://lod.bco-dmo.org/id/dataset-parameter/999618.rdf
Name: Lu_S_COUNT
Units: unitless
Description: <p>Number of analyses used for Lu_S_Conc. 'na' for 'not applicable' used when no sample was collected for this parameter</p>
http://lod.bco-dmo.org/id/dataset-parameter/999619.rdf
Name: Lu_S_FLAG
Units: unitless
Description: <p>Quality flag for Lu_S_CONC</p>
http://lod.bco-dmo.org/id/dataset-parameter/999620.rdf
Name: Pb_S_CONC
Units: Picomoles per liter (pmol/L)
Description: <p>Concentrations of soluble (<0.02 µm) lead (Pb) in project samples. 'na' for 'not applicable' used when no sample was collected for this parameter</p>
http://lod.bco-dmo.org/id/dataset-parameter/999621.rdf
Name: Pb_S_STDEV
Units: Picomoles per liter (pmol/L)
Description: <p>Standard deviation of replicate soluble lead (Pb) measurements. If only 2 replicates, the difference about the mean was used to calculate error. 'na' for 'not applicable' used when no error estimates calculated for this parameter</p>
http://lod.bco-dmo.org/id/dataset-parameter/999622.rdf
Name: Pb_S_COUNT
Units: unitless
Description: <p>Number of analyses used for Pb_S_Conc. 'na' for 'not applicable' used when no sample was collected for this parameter</p>
http://lod.bco-dmo.org/id/dataset-parameter/999623.rdf
Name: Pb_S_FLAG
Units: unitless
Description: <p>Quality flag for Pb_S_CONC</p>
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<p><strong>Sample collection</strong></p>
<p>Water column samples were collected in February and March 2023 aboard the R/V Atlantic Explorer using a trace metal clean rosette (SeaBird) outfitted with 12-L Niskin-X samplers (Ocean Test Equipment), a trace metal clean pump, or a custom surface pump “towfish” system (Mellett and Buck, 2020). Seawater samples for dissolved (D) trace metal analysis were filtered through 0.2 µm Pall Acropak Super membrane filter capsules and collected in acid-cleaned and triple-rinsed 125-mL low density polyethylene (LDPE) bottles. A subset of dissolved trace metal samples was collected in fluorinated high-density polyethylene (FPE, Nalgene) bottles for subsequent ultrafiltration for soluble trace metal analysis. These samples were filtered through 0.02 µm Anodisc filter membranes (Cytiva Whatman) held in a Teflon filtration rig (Savillex) on a custom acrylic tower and collected in acid-cleaned and triple-rinsed 125-mL LDPE bottles. Unfiltered seawater samples for total dissolvable trace metal analysis were also collected in acid-cleaned and triple-rinsed 125-mL low density polyethylene (LDPE) bottles.</p>
<p>Samples from seawater incubation experiments were filtered through consecutive acid-cleaned 5 µm and 0.4 µm polycarbonate track-etched (PCTE, Whatman) filters in a dual stage Teflon filter rig (Savillex) on a custom acrylic tower. Filtrate from the 0.4 µm filters was collected in acid-cleaned and triple-rinsed 125-mL LDPE bottles for subsequent dissolved trace metal concentration measurements. The 5 µm and 0.4 µm filters were folded in eighths, placed in acid-cleaned snap-cap polypropylene centrifuge tubes, and frozen at -20 ºC for labile particulate metals.</p>
<p>All dissolved, soluble and total dissolvable trace metal samples were acidified shipboard with ultrapure hydrochloric acid (HCl, Optima) to 0.024 N HCl, double bagged in buckets and stored at room temperature until analyzed at Oregon State University (OSU).</p>
<p><strong>Analysis of dissolved and soluble trace metal concentrations</strong></p>
<p>Analysis of seawater samples for the concentrations of dissolved (&lt;0.2 µm or &lt;0.4 µm) and soluble (&lt;0.02 µm) trace metals, including aluminum (Al; dissolved only), scandium (Sc), manganese (Mn), iron (Fe), cobalt (Co), nickel (Ni), copper (Cu), zinc (Zn), cadmium (Cd), gadolinium (Gd), lutetium (Lu) and lead (Pb), were performed using an automated SeaFAST pico (Elemental Scientific, Inc.) in-line (Lagerström et al. 2013) with a Thermo Scientific iCAP-RQ Quadrupole CCT ICP-MS. This instrument is maintained at OSU in the Keck Collaboratory for Plasma Spectrometry.</p>
<p>Trace metals were eluted from the Nobias-1A resin in seaFAST using 10% nitric acid (Optima, Fisher) containing 1 ppb indium as an internal standard and quantified using nine-point calibration curves in filtered (&lt;0.2 µm) surface seawater collected offshore in the Gulf of Mexico in 2018 (Hollister et al. 2020) and stored unacidified in an acid-cleaned and double-bagged polypropylene in the dark; prior to use for the seawater matrix, a 2-L aliquot was pulled from the carboy and acidified to 0.024 N hydrochloric acid (HCl, Optima) to match the sample matrix. Subsamples of two in-house seawater quality control samples (collected previously from offshore surface waters, and from the EPZ GEOTRACES GP16 transect) were measured in each run and were also analyzed in tandem with community-established reference materials (SAFe-D1, SAFe-D2, GSC and NASS-7). All reference material results are provided&nbsp;in the supplemental document. Analytical blanks for the seaFAST method were obtained using air blanks, and limits of detection were calculated as three times the standard deviation of the averaged air blanks in each analytical run (Hollister et al. 2020).</p>
<p>Samples were analyzed a second time following the same procedure outlined above but after 90 minutes of UV-oxidation to ensure complete recovery of any organic-bound Cu and Co (Biller and Bruland 2012). The UV-oxidation was carried out on aliquots of samples in 15-mL Teflon vials (Savillex) with custom quartz lids (Hollister et al. 2020). For all elements except Cu and Co, results from analyses after UV-oxidation were combined with no UV results to achieve an additional analytical replicate.</p>
<p>Sample analyses for trace metals were performed by senior researcher Dr. Salvatore Caprara in the College of Earth, Ocean and Atmospheric Sciences at Oregon State University.</p>
Specified by the Principal Investigator(s)
<p>Data were flagged using the SeaDataNet quality flag scheme recommended by GEOTRACES (https://www.geotraces.org/geotraces-quality-flag-policy/) and described below. Notes specific to the application of these flags to this dataset are noted in brackets […].</p>
<p>0: No Quality Control: No quality control procedures have been applied to the data value. This is the initial status for all data values entering the working archive. [Not used].</p>
<p>1: Good Value: Good quality data value that is not part of any identified malfunction and has been verified as consistent with real phenomena during the quality control process. [Used for parameters analyzed in replicate or accompanied by certified reference material analyses. See accompanying Table 1 in the supplemental document for certified reference material values obtained in this study].</p>
<p>2: Probably Good Value: Data value that is probably consistent with real phenomena, but this is unconfirmed or data value forming part of a malfunction that is considered too small to affect the overall quality of the data object of which it is a part. [Used when no replicate measurements and no certified reference were available to check the quality of the data].</p>
<p>3: Probably Bad Value: Data value recognized as unusual during quality control that forms part of a feature that is probably inconsistent with real phenomena. [Used when either precision of the results was poor or results were inconsistent with expected distributions].</p>
<p>4: Bad Value: An obviously erroneous data value. [Not used].</p>
<p>5: Changed Value: Data value adjusted during quality control. Best practice strongly recommends that the value before the change be preserved in the data or its accompanying metadata. [Not used].</p>
<p>6: Value Below Detection Limit: The level of the measured phenomenon was less than the limit of detection (LOD) for the method employed to measure it. The accompanying value is the detection limit for the technique or zero if that value is unknown. [Values below detection are reported as 0 and should be interpreted using the associated quality flag = 6. Average blanks and detection limits for each parameter are provided in accompanying Table 2&nbsp;in the supplemental document].</p>
<p>7: Value in Excess: The level of the measured phenomenon was too large to be quantified by the technique employed to measure it. The accompanying value is the measurement limit for the technique. [Not used].</p>
<p>8: Interpolated Value: This value has been derived by interpolation from other values in the data object. [Not used].</p>
<p>9: Missing Value: The data value is missing. Any accompanying value will be a magic number representing absent data [Used when no data available for this parameter].</p>
<p>A: Value Phenomenon Uncertain: There is uncertainty in the description of the measured phenomenon associated with the value such as chemical species or biological entity. [Not used].</p>
Specified by the Principal Investigator(s)
- Loaded BCO-DMO_Buck_STING-I_Metals_260206.csv as CSV with row 1 as header, row 2 skipped (units row), treating "", "nd", "na", and "nda" as missing values
- Combined DATE_UTC and TIME_UTC columns (format %m/%d/%y and %H:%M) into new DATETIME_UTC column formatted as %Y-%m-%dT%H:%MZ (datetime type)
- Combined DATE_EST and TIME_EST columns (format %m/%d/%y and %H:%M) into new DATETIME_EST column formatted as %Y-%m-%dT%H:%M (datetime type)
- Reordered all columns, placing DATETIME_UTC and DATETIME_EST after their source date/time columnsconcentration/stdev/count/flag columns for Al, Sc, Mn, Fe, Co, Ni, Cu, Zn, Cd, Gd, Lu, and Pb
- Reformatted DATE_UTC as %Y-%m-%d date type (UTC timezone)
- Reformatted DATE_EST as %Y-%m-%d datetime type (America/New_York timezone)
- Applied BCO-DMO metadata (descriptions, supplied_units, standard_name_ids) to all columns; corrected unit labels where "pmol" had been incorrectly used instead of "nmol" for Cu, Mn, Ni, Zn, and Fe dissolved/soluble columns
- Renamed column Cou_S_UV_FLAG to Cu_S_UV_FLAG to correct a typo
- Updated descriptions for Mn_S_COUNT, Ni_D_FLAG, and Ni_S_FLAG columns to identify the correct field being referenced
- Output written to 997813_v1_sting_i_dissolved_soluble_tm.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
trace metal clean rosette with a programmable autofire module (Seabird)
trace metal clean rosette with a programmable autofire module (Seabird)
PI Supplied Instrument Name: trace metal clean rosette with a programmable autofire module (Seabird) PI Supplied Instrument Description:Rosette: 12-L trace metal clean modified X-Niskin bottles (Ocean Test Equipment) mounted on a trace metal clean rosette with a programmable autofire module (Seabird) and deployed on 1/4” 12-strand Spectra synthetic line to collect depth profile seawater samples. Instrument Name: CTD Sea-Bird 911 Instrument Short Name:CTD SBE 911 Instrument Description: The Sea-Bird SBE 911 is a type of CTD instrument package. The SBE 911 includes the SBE 9 Underwater Unit and the SBE 11 Deck Unit (for real-time readout using conductive wire) for deployment from a vessel. The combination of the SBE 9 and SBE 11 is called a SBE 911. The SBE 9 uses Sea-Bird's standard modular temperature and conductivity sensors (SBE 3 and SBE 4). The SBE 9 CTD can be configured with auxiliary sensors to measure other parameters including dissolved oxygen, pH, turbidity, fluorescence, light (PAR), light transmission, etc.). More information from Sea-Bird Electronics. Community Standard Description: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0035/
X-Niskin bottles
X-Niskin bottles
PI Supplied Instrument Name: X-Niskin bottles PI Supplied Instrument Description:Rosette: 12-L trace metal clean modified X-Niskin bottles (Ocean Test Equipment) mounted on a trace metal clean rosette with a programmable autofire module (Seabird) and deployed on 1/4” 12-strand Spectra synthetic line to collect depth profile seawater samples. 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/
TM pump sampling system
TM pump sampling system
PI Supplied Instrument Name: TM pump sampling system PI Supplied Instrument Description:TM pump sampling system: Acid-cleaned ½” PTFE tubing was deployed on 1/4” 12-strand Spectra synthetic line to collect surface and water column depth profile seawater samples at stations with water depth < 50 m; seawater was pumped on board using a Wilden Pro-Flo Series P100 PTFE Diaphragm Pump. 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
iCAP-RQ Quadrupole CCT ICP-MS (Thermo Scientific)
iCAP-RQ Quadrupole CCT ICP-MS (Thermo Scientific)
PI Supplied Instrument Name: iCAP-RQ Quadrupole CCT ICP-MS (Thermo Scientific) PI Supplied Instrument Description:iCAP-RQ Quadrupole CCT ICP-MS (Thermo Scientific) was used to measure trace metal concentrations in seawater samples. Instrument Name: Quadrupole Mass Spectrometer Instrument Short Name:QMS Instrument Description: A piece of apparatus that consists of an ion source, a mass-to-charge analyser, a detector and a vacuum system and is used to measure mass spectra. The detector is a quadrupole mass-to-charge analyser, which holds the ions in a stable orbit by an electric field generated by four parallel electrodes.
SeaFAST pico (ESI)
SeaFAST pico (ESI)
PI Supplied Instrument Name: SeaFAST pico (ESI) PI Supplied Instrument Description:SeaFAST pico (ESI) was used to preconcentrate trace elements from seawater samples. Instrument Name: SeaFAST Automated Preconcentration System Instrument Short Name: Instrument Description: The seaFAST is an automated sample introduction system for analysis of seawater and other high matrix samples for analyses by ICPMS (Inductively Coupled Plasma Mass Spectrometry).
towfish
towfish
PI Supplied Instrument Name: towfish PI Supplied Instrument Description:Towfish: Seawater samples were collected with a custom surface sampling system, “towfish” (Mellett and Buck 2020), comprised of acid cleaned Bev-A-Line-IV tubing and an Almatec E15TTT Double PTFE Diaphragm Pump. Instrument Name: towed unmanned submersible Instrument Short Name:towed unmanned submersible Instrument Description: A vehicle towed by rigid cable through the water column at fixed or varying depth with no propulsion and no human operator (e.g. Towfish, Scanfish, UOR, SeaSoar).
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