http://lod.bco-dmo.org/id/dataset/988663
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
2025-11-11
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
Dissolved iron-bound and total Fe-binding humic-like substances for water column samples collected in the West Antarctic Peninsula region of the Southern Ocean on RVIB Nathaniel B. Palmer cruise NBP1608 in Sept-Oct 2016
2026-03-25
publication
2026-03-25
revision
Woods Hole Oceanographic Institution (WHOI BCO-DMO)
2026-03-31
publication
https://doi.org/10.26008/1912/bco-dmo.988663.1
Kristen Nicolle Buck
Oregon State University
principalInvestigator
Phoebe Dreux Chappell
University of South Florida
principalInvestigator
Bethany D. Jenkins
University of Rhode Island
principalInvestigator
Laura Ellen Moore
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., Moore, L. E., Kisiday, A., Chappell, P. D., Jenkins, B. D. (2026) Dissolved iron-bound and total Fe-binding humic-like substances for water column samples collected in the West Antarctic Peninsula region of the Southern Ocean on RVIB Nathaniel B. Palmer cruise NBP1608 in Sept-Oct 2016. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2026-03-25 [if applicable, indicate subset used]. doi:10.26008/1912/bco-dmo.988663.1 [access date]
West Antarctic FeHS and HS-total Dataset Description: <p><strong>Funding information:</strong> The deployment (sample collection) was funded by NSF award OPP-1443483, and the analyses by OPP-2317664 and OCE-2300915.</p> Methods and Sampling: <p><strong>Water column sampling:</strong><br />
The full water column of 21 stations near the West Antarctic Peninsula was sampled between 11 September 2016 and 10 October 2016 aboard the R/V IB Nathaniel B. Palmer. Depth profile samples were collected using 12-liter (L) Niskin bottles (OceanTestEquipment, Inc) mounted on a trace metal clean rosette sampling system (SBE32, Seabird; TMC CTD).</p>
<p>From the trace metal clean rosette, samples for humic-like substances were filtered through pre-cleaned 0.2-micrometer (µm) polyethersulfone membrane filters (Acropak 200, Pall Corporation). Samples were collected in acid-cleaned, narrow-mouth 500-milliliter (mL) fluorinated high-density polyethylene bottles (FLPE; Nalgene) and stored at -20 degrees Celsius (ºC) until shore-based humic-like substance and ligand analyses at Oregon State University.</p>
<p><strong>Sample analyses – humic-like substances:</strong><br />
Electroactive, Fe-binding humic-like substances (HS) were measured using adsorptive cathodic stripping voltammetry based on the method first developed by Laglera et al. (2007) and updated by Sukekava et al. (2018). All samples were analyzed using a polarographic 797 VA Computrace (Metrohm) stand equipped with a hanging mercury drop electrode, Ag/AgCl reference electrode, platinum rod auxiliary electrode, and an acid-cleaned Teflon analytical cell. Briefly, frozen samples were set out to thaw overnight at room temperature in the dark. The following day, 10 mL sub-samples were aliquoted into each of 2 paired acid-cleaned, pre-conditioned 50 mL polypropylene vials (MetalFree, Labcon), followed by the addition of 50 microliters (μL) of 1.5 molar (M) boric acid buffer to maintain a solution pH of 8.2. Iron standard was added to one of the paired vials (vial B, final concentration 60 nanomolar (nM)) to saturate all the humic-like substance binding groups in the solution, while vial A was left under ambient Fe conditions. Vial A represented the amount of Fe bound to HS in-situ (Fe-HS) and vial B represented the total amount of Fe-binding HS in the sample (HS<sub>T</sub>). Both aliquots were left to equilibrate for a minimum of 14 hours. After the equilibration period, vial A was added to the Teflon voltammetric cell with an addition of 500 μL of 0.4M KBrO<sub>3</sub>- catalyst. The sample was then purged for 300 seconds with high-purity N<sub>2</sub> gas, and then electrochemical analysis was performed with a 60-120 second deposition period with stirring at -0.1 volts (V) followed by linear sweep voltammetry (-0.1 to -1V, scan rate 50 millivolts per second (mV s-1)). Vial B was analyzed immediately following vial A under the same conditions, then three successive standard additions of Fe-saturated Suwannee River Fulvic Acid (SRFA) standard were added. Default standard additions were 0.1, 0.2, and 0.3 milligrams (mg) SRFA per liter, and up to 0.6 mg SRFA per liter for samples with high HS concentrations. A 70 second N<sub>2</sub> purge was included after each addition to ensure oxygen removal. All measurements were measured in triplicate, and the Teflon analytical cell was rinsed thoroughly with Milli-Q water between samples to minimize carryover. Due to high HS concentrations, 13 samples required dilutions with Milli-Q water prior to analysis. Dilutions were 1:10 (n = 2), 1:5 (n = 10), and 5:1 (n = 1) volume sample : volume Milli-Q.</p>
<p>Peak heights were extracted from scans using ECDSOFT software (Omanović, 2025; Omanović and Branica, 1998), then the peak heights from vial A and vial B were converted into Fe-HS and HS<sub>T</sub> concentrations, respectively in micrograms (μg) SRFA eq per liter using the slope of curve generated by the three standard additions. Units were then converted to nM Fe eq using the measured binding capacity of SRFA in seawater 14.6 ± 0.4 nmol Fe per mg SRFA. Median variability between replicate scans was 0.02 nM Fe eq (average 0.03) for Fe-HS and 0.02 nM Fe eq (average 0.06) for HS<sub>T</sub>. The limit of detection (LOD) was calculated as three times the standard deviation of triplicate scans of a UV seawater blank at 120 s (0.03 ± 0.01 nM Fe eq) and was estimated to be 0.03 nM Fe eq. Only one sample had a concentration at or below the LOD (Stn 16–33m, Fe-HS = 0.03 nM Fe eq).</p>
Funding provided by NSF Office of Polar Programs (formerly NSF PLR) (NSF OPP) Award Number: OPP-1443483 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1443483
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-2300915 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=2300915
Funding provided by NSF Office of Polar Programs (formerly NSF PLR) (NSF OPP) Award Number: OPP-2317664 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=2317664
completed
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
Bethany D. Jenkins
University of Rhode Island
401-874-7551
Department of Cell and Molecular Biology and Graduate School of Oceanography 279 CBLS, 120 Flagg Road
Kingston
RI
02881
USA
bdjenkins@uri.edu
pointOfContact
Laura Ellen Moore
Oregon State University
moorel6@oregonstate.edu
pointOfContact
asNeeded
Dataset Version: 1
Unknown
CRUISE_ID
EVTNBR
ISO_DateTime_UTC
LATITUDE
LONGITUDE
PLATFORM
CASTNBR
STNNBR
BTLNBR
SAMPDEPTH
SAMPDILUTION
HSFe_D_CONC_uG_SRFA_EQ_L
HSFe_D_STDEV_uG_SRFA_EQ_L
HSFe_D_CONC_NMOL_FE_EQ_L
HSFe_D_STDEV_NMOL_FE_EQ_L
HSFe_D_COUNT
HSFe_D_FLAG
THSFe_D_CONC_uG_SRFA_EQ_L
THSFe_D_STDEV_uG_SRFA_EQ_L
THSFe_D_CONC_NMOL_FE_EQ_L
THSFe_D_STDEV_NMOL_FE_EQ_L
THSFe_D_COUNT
THSFe_D_FLAG
Metrohm VA 797 Computrace equipped with a hanging mercury drop electrode
OceanTestEquipment, Inc 12-L Niskin bottle samplers
Seabird SBE 32 trace metal-modified frame and rosette sampling system
theme
None, User defined
Cruise identfier
event
ISO_DateTime_UTC
latitude
longitude
instrument
cast
station
bottle
depth
sample description
Iron
count
flag
featureType
BCO-DMO Standard Parameters
Metrohm 797 VA Computrace voltammetry system
Niskin bottle
Seabird SBE 32 Carousel Water Sampler
instrument
BCO-DMO Standard Instruments
NBP1608
service
Deployment Activity
Southern Ocean
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: Investigating Iron-binding Ligands in Southern Ocean Diatom Communities: The Role of Diatom-Bacteria Associations
https://osprey.bco-dmo.org/project/738582
Collaborative Research: Investigating Iron-binding Ligands in Southern Ocean Diatom Communities: The Role of Diatom-Bacteria Associations
<p>This project focuses on an important group of photosynthetic algae in the Southern Ocean (SO), diatoms, and the roles associated bacterial communities play in modulating their growth. Diatom growth fuels the SO food web and balances atmospheric carbon dioxide by sequestering the carbon used for growth to the deep ocean on long time scales as cells sink below the surface. The diatom growth is limited by the available iron in the seawater, most of which is not freely available to the diatoms but instead is tightly bound to other compounds. The nature of these compounds and how phytoplankton acquire iron from them is critical to understanding productivity in this region and globally. The investigators will conduct experiments to characterize the relationship between diatoms, their associated bacteria, and iron in open ocean and inshore waters. Experiments will involve supplying nutrients at varying nutrient ratios to natural phytoplankton assemblages to determine how diatoms and their associated bacteria respond to different conditions. This will provide valuable data that can be used by climate and food web modelers and it will help us better understand the relationship between iron, a key nutrient in the ocean, and the organisms at the base of the food web that use iron for photosynthetic growth and carbon uptake. The project will also further the NSF goals of training new generations of scientists and of making scientific discoveries available to the general public. The project supports early career senior investigators and the training of graduate and undergraduate students as well as outreach activities with middle school Girl Scouts in Rhode Island, inner city middle and high school age girls in Virginia, and middle school girls in Florida.</p>
<p>The project combines trace metal biogeochemistry, phytoplankton cultivation, and molecular biology to address questions regarding the production of iron-binding compounds and the role of diatom-bacterial interactions in this iron-limited region. Iron is an essential micronutrient for marine phytoplankton. Phytoplankton growth in the SO is limited by a lack of sufficient iron, with important consequences for carbon cycling and climate in this high latitude regime. Some of the major outstanding questions in iron biogeochemistry relate to the organic compounds that bind >99.9% of dissolved iron in surface oceans. The investigators' prior research in this region suggests that production of strong iron-binding compounds in the SO is linked to diatom blooms in waters with high nitrate to iron ratios. The sources of these compounds are unknown but the investigators hypothesize that they may be from bacteria, which are known to produce such compounds for their own use. The project will test three hypotheses concerning the production of these iron-binding compounds, limitations on the biological availability of iron even if present in high concentrations, and the roles of diatom-associated bacteria in these processes. Results from this project will provide fundamental information about the biogeochemical trigger, and biological sources and function, of natural strong iron-binding compound production in the SO, where iron plays a critical role in phytoplankton productivity, carbon cycling, and climate regulation.</p>
Diatom_Bacteria_Ligands
largerWorkCitation
project
eng; USA
oceans
Southern Ocean
-68.158
-56.659
-64.9208
-60.7801
2016-09-11
2016-10-10
Southern Ocean, Western Antarctic Peninsula 60-65 S, 63 W
0
BCO-DMO catalogue of parameters from Dissolved iron-bound and total Fe-binding humic-like substances for water column samples collected in the West Antarctic Peninsula region of the Southern Ocean on RVIB Nathaniel B. Palmer cruise NBP1608 in Sept-Oct 2016
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
http://lod.bco-dmo.org/id/dataset-parameter/995630.rdf
Name: CRUISE_ID
Units: unitless
Description: <p>Cruise identifier</p>
http://lod.bco-dmo.org/id/dataset-parameter/995631.rdf
Name: EVTNBR
Units: unitless
Description: <p>Event number</p>
http://lod.bco-dmo.org/id/dataset-parameter/995632.rdf
Name: ISO_DateTime_UTC
Units: unitless
Description: <p>Date and time (UTC) when sampling was initiated</p>
http://lod.bco-dmo.org/id/dataset-parameter/995633.rdf
Name: LATITUDE
Units: decimal degrees
Description: <p>Ship position when sampling platform was deployed in decimal degrees North</p>
http://lod.bco-dmo.org/id/dataset-parameter/995634.rdf
Name: LONGITUDE
Units: decimal degrees
Description: <p>Ship position when sampling platform was deployed in decimal degrees East</p>
http://lod.bco-dmo.org/id/dataset-parameter/995635.rdf
Name: PLATFORM
Units: unitless
Description: <p>Sampling system used. TMC CTD = trace metal CTD rosette.</p>
http://lod.bco-dmo.org/id/dataset-parameter/995636.rdf
Name: CASTNBR
Units: unitless
Description: <p>Cast number</p>
http://lod.bco-dmo.org/id/dataset-parameter/995637.rdf
Name: STNNBR
Units: unitless
Description: <p>Station number</p>
http://lod.bco-dmo.org/id/dataset-parameter/995638.rdf
Name: BTLNBR
Units: unitless
Description: <p>Bottle number (Niskin # for TMC CTD) used for sample collection</p>
http://lod.bco-dmo.org/id/dataset-parameter/995639.rdf
Name: SAMPDEPTH
Units: meters (m)
Description: <p>Depth in meters of sample collection</p>
http://lod.bco-dmo.org/id/dataset-parameter/995640.rdf
Name: SAMPDILUTION
Units: VOL_SAMP_ML:VOL_MILLIQ_ML
Description: <p>Dilution factor of sample in MilliQ prior to electrochemical analysis expressed as volume sample to volume MilliQ ratio in mL:mL; ‘na’ used when no dilution was performed, ‘nda’ for ‘no data available’ when sample was not analyzed</p>
http://lod.bco-dmo.org/id/dataset-parameter/995641.rdf
Name: HSFe_D_CONC_uG_SRFA_EQ_L
Units: micrograms of SRFA equivalents per liter (μg SRFA EQ/L)
Description: <p>Concentration of in-situ iron bound to electroactive humic-like substances in field samples; ‘nda’ for ‘no data available’ used when sample was not analyzed.</p>
http://lod.bco-dmo.org/id/dataset-parameter/995642.rdf
Name: HSFe_D_STDEV_uG_SRFA_EQ_L
Units: micrograms of SRFA equivalents per liter (μg SRFA EQ/L)
Description: <p>Standard deviation of replicate scans of in-situ iron bound to electroactive humic-like substances concentration measurements in field samples. Standard deviation reported is that of replicate scans of the same aliquot. ‘nda’ for ‘no data available’ used when sample was not analyzed.</p>
http://lod.bco-dmo.org/id/dataset-parameter/995643.rdf
Name: HSFe_D_CONC_NMOL_FE_EQ_L
Units: nanomoles Fe equivalents per liter (NMOL FE EQ/L)
Description: <p>Concentration of in-situ iron bound to electroactive humic-like substances in field samples; ‘nda’ for ‘no data available’ used when sample was not analyzed.</p>
http://lod.bco-dmo.org/id/dataset-parameter/995644.rdf
Name: HSFe_D_STDEV_NMOL_FE_EQ_L
Units: nanomoles Fe equivalents per liter (NMOL FE EQ/L)
Description: <p>Standard deviation of replicate scans of in-situ iron bound to electroactive humic-like substances concentration measurements in field samples. Standard deviation reported is that of replicate scans of the same aliquot. ‘nda’ for ‘no data available’ used when sample was not analyzed.</p>
http://lod.bco-dmo.org/id/dataset-parameter/995645.rdf
Name: HSFe_D_COUNT
Units: unitless
Description: <p>Number of separate analyses of this sample used to compute average concentration and standard deviation. ‘nda’ for ‘no data available’ used when sample was not analyzed.</p>
http://lod.bco-dmo.org/id/dataset-parameter/995646.rdf
Name: HSFe_D_FLAG
Units: unitless
Description: <p>Quality flag for HSFe_D_CONC. ‘nda’ for ‘no data available’ used when sample was not analyzed.</p>
http://lod.bco-dmo.org/id/dataset-parameter/995647.rdf
Name: THSFe_D_CONC_uG_SRFA_EQ_L
Units: micrograms of SRFA equivalents per liter (μg SRFA EQ/L)
Description: <p>Total electroactive iron binding humic-like substances in field samples; ‘nda’ for ‘no data available’ used when sample was not analyzed.</p>
http://lod.bco-dmo.org/id/dataset-parameter/995648.rdf
Name: THSFe_D_STDEV_uG_SRFA_EQ_L
Units: micrograms of SRFA equivalents per liter (μg SRFA EQ/L)
Description: <p>Standard deviation of replicate scans of total electroactive iron binding humic-like substances measurements in field samples. Standard deviation reported is that of replicate scans of the same aliquot. ‘nda’ for ‘no data available’ used when sample was not analyzed.</p>
http://lod.bco-dmo.org/id/dataset-parameter/995649.rdf
Name: THSFe_D_CONC_NMOL_FE_EQ_L
Units: nanomoles Fe equivalents per liter (NMOL FE EQ/L)
Description: <p>Total electroactive iron binding humic-like substances in field samples; ‘nda’ for ‘no data available’ used when sample was not analyzed.</p>
http://lod.bco-dmo.org/id/dataset-parameter/995650.rdf
Name: THSFe_D_STDEV_NMOL_FE_EQ_L
Units: nanomoles Fe equivalents per liter (NMOL FE EQ/L)
Description: <p>Standard deviation of replicate scans of total electroactive iron binding humic-like substances measurements in field samples. Standard deviation reported is that of replicate scans of the same aliquot. ‘nda’ for ‘no data available’ used when sample was not analyzed.</p>
http://lod.bco-dmo.org/id/dataset-parameter/995651.rdf
Name: THSFe_D_COUNT
Units: unitless
Description: <p>Number of separate analyses of this sample used to compute average concentration and standard deviation. ‘nda’ for ‘no data available’ used when sample was not analyzed.</p>
http://lod.bco-dmo.org/id/dataset-parameter/995652.rdf
Name: THSFe_D_FLAG
Units: unitless
Description: <p>Quality flag for THSFe_D_CONC. ‘nda’ for ‘no data available’ used when sample was not analyzed.</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.988663.1
download
onLine
dataset
<p><strong>Water column sampling:</strong><br />
The full water column of 21 stations near the West Antarctic Peninsula was sampled between 11 September 2016 and 10 October 2016 aboard the R/V IB Nathaniel B. Palmer. Depth profile samples were collected using 12-liter (L) Niskin bottles (OceanTestEquipment, Inc) mounted on a trace metal clean rosette sampling system (SBE32, Seabird; TMC CTD).</p>
<p>From the trace metal clean rosette, samples for humic-like substances were filtered through pre-cleaned 0.2-micrometer (µm) polyethersulfone membrane filters (Acropak 200, Pall Corporation). Samples were collected in acid-cleaned, narrow-mouth 500-milliliter (mL) fluorinated high-density polyethylene bottles (FLPE; Nalgene) and stored at -20 degrees Celsius (ºC) until shore-based humic-like substance and ligand analyses at Oregon State University.</p>
<p><strong>Sample analyses – humic-like substances:</strong><br />
Electroactive, Fe-binding humic-like substances (HS) were measured using adsorptive cathodic stripping voltammetry based on the method first developed by Laglera et al. (2007) and updated by Sukekava et al. (2018). All samples were analyzed using a polarographic 797 VA Computrace (Metrohm) stand equipped with a hanging mercury drop electrode, Ag/AgCl reference electrode, platinum rod auxiliary electrode, and an acid-cleaned Teflon analytical cell. Briefly, frozen samples were set out to thaw overnight at room temperature in the dark. The following day, 10 mL sub-samples were aliquoted into each of 2 paired acid-cleaned, pre-conditioned 50 mL polypropylene vials (MetalFree, Labcon), followed by the addition of 50 microliters (μL) of 1.5 molar (M) boric acid buffer to maintain a solution pH of 8.2. Iron standard was added to one of the paired vials (vial B, final concentration 60 nanomolar (nM)) to saturate all the humic-like substance binding groups in the solution, while vial A was left under ambient Fe conditions. Vial A represented the amount of Fe bound to HS in-situ (Fe-HS) and vial B represented the total amount of Fe-binding HS in the sample (HS<sub>T</sub>). Both aliquots were left to equilibrate for a minimum of 14 hours. After the equilibration period, vial A was added to the Teflon voltammetric cell with an addition of 500 μL of 0.4M KBrO<sub>3</sub>- catalyst. The sample was then purged for 300 seconds with high-purity N<sub>2</sub> gas, and then electrochemical analysis was performed with a 60-120 second deposition period with stirring at -0.1 volts (V) followed by linear sweep voltammetry (-0.1 to -1V, scan rate 50 millivolts per second (mV s-1)). Vial B was analyzed immediately following vial A under the same conditions, then three successive standard additions of Fe-saturated Suwannee River Fulvic Acid (SRFA) standard were added. Default standard additions were 0.1, 0.2, and 0.3 milligrams (mg) SRFA per liter, and up to 0.6 mg SRFA per liter for samples with high HS concentrations. A 70 second N<sub>2</sub> purge was included after each addition to ensure oxygen removal. All measurements were measured in triplicate, and the Teflon analytical cell was rinsed thoroughly with Milli-Q water between samples to minimize carryover. Due to high HS concentrations, 13 samples required dilutions with Milli-Q water prior to analysis. Dilutions were 1:10 (n = 2), 1:5 (n = 10), and 5:1 (n = 1) volume sample : volume Milli-Q.</p>
<p>Peak heights were extracted from scans using ECDSOFT software (Omanović, 2025; Omanović and Branica, 1998), then the peak heights from vial A and vial B were converted into Fe-HS and HS<sub>T</sub> concentrations, respectively in micrograms (μg) SRFA eq per liter using the slope of curve generated by the three standard additions. Units were then converted to nM Fe eq using the measured binding capacity of SRFA in seawater 14.6 ± 0.4 nmol Fe per mg SRFA. Median variability between replicate scans was 0.02 nM Fe eq (average 0.03) for Fe-HS and 0.02 nM Fe eq (average 0.06) for HS<sub>T</sub>. The limit of detection (LOD) was calculated as three times the standard deviation of triplicate scans of a UV seawater blank at 120 s (0.03 ± 0.01 nM Fe eq) and was estimated to be 0.03 nM Fe eq. Only one sample had a concentration at or below the LOD (Stn 16–33m, Fe-HS = 0.03 nM Fe eq).</p>
Specified by the Principal Investigator(s)
<p>Data were flagged using the SeaDataNet quality flag scheme recommended by GEOTRACES (<a href="https://www.geotraces.org/geotraces-quality-flag-policy/" target="_blank">https://www.geotraces.org/geotraces-quality-flag-policy/</a>) 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. [Not used].</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 replicates or reference samples were available to further verify the quality of the data; used for most data here].</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 for Fe-HS data when Fe-HS &gt; Fe concentrations by more than 0.02 nM, the median std dev of triplicate scans].</p>
<p>4: Bad Value: An obviously erroneous data value. [used when variability in triplicate scans exceeded measured value or for suspected bottle misfire].</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. [used when Fe-HS or HST were ≤ 0.03 nM Fe eq].</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 [When sample was not analyzed the notation 'nda' for no data available was used].</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)
- Imported original file "BCO_DMO_Moore_Kisiday_WestAnt_HS-FeL-UPDATE2026March.xlsx" into the BCO-DMO system.
- Renamed fields to comply with BCO-DMO naming conventions.
- Converted DATE (%m-%d-%y) and GMT (%H:%M) (interpreted as UTC) into a combined datetime field ISO_DateTime_UTC formatted as %Y-%m-%dT%H:%MZ (UTC).
- Removed the original DATE and GMT columns.
- Saved final file as "988663_v1_westant_hs-fel.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
Metrohm VA 797 Computrace equipped with a hanging mercury drop electrode
Metrohm VA 797 Computrace equipped with a hanging mercury drop electrode
PI Supplied Instrument Name: Metrohm VA 797 Computrace equipped with a hanging mercury drop electrode PI Supplied Instrument Description:Used to measure Fe bound to humic-like substances and total Fe binding capacity of humic-like substances Instrument Name: Metrohm 797 VA Computrace voltammetry system Instrument Short Name:Metrohm 797 VA Instrument Description: A computer-controlled voltammetric measuring stand with built-in potentiostat and galvanostat. Applications include voltammetric trace analysis of metal ions and other substances, and Cyclic Voltammetric Stripping (CVS) for the determination of additives in electroplating baths. Operation of the 797 VA Computrace Stand follows the potentiostatic 3-electrode principle in which the voltage of the working mercury electrode is controlled by means of a virtually currentless Ag/AgCl reference electrode to the preset desired value and the current flows across a separate platinum auxiliary electrode. The pneumatically operated Multi-Mode Electrode (MME) can operate in Hanging Mercury Drop Electrode (HMDE), Dropping Mercury Electrode (DME), or Static Mercury Drop Electrode (SMDE) modes. A Rotating Disk Electrode with exchangeable electrode tips can be used in place of the MME. Additional accessories such as autosamplers and sample processors allow for full automation of analysis, and a range of accessory kits are available to extend the range of applications. The instrument supports over 220 analytical methods.
OceanTestEquipment, Inc 12-L Niskin bottle samplers
OceanTestEquipment, Inc 12-L Niskin bottle samplers
PI Supplied Instrument Name: OceanTestEquipment, Inc 12-L Niskin bottle samplers PI Supplied Instrument Description:Used with the rosette system for trace metal clean seawater collection from depth profiles 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/
Seabird SBE 32 trace metal-modified frame and rosette sampling system
Seabird SBE 32 trace metal-modified frame and rosette sampling system
PI Supplied Instrument Name: Seabird SBE 32 trace metal-modified frame and rosette sampling system PI Supplied Instrument Description:Used for depth profile sample collection Instrument Name: Seabird SBE 32 Carousel Water Sampler Instrument Short Name:SBE 32 Instrument Description: The SBE 32 is a Carousel Water Sampler. With an accessory Deck Unit, the Carousel provides water sampling and real-time CTD data acquisition with any Sea-Bird profiling CTD (requires electro-mechanical cable and slip-ring equipped winch). With an accessory underwater unit, the Carousel can operate autonomously with a Sea-Bird Scientific profiling CTD and can be programmed to close bottles at selected depths, allowing deployment using non-electrical wire or line. The Carousel is available in two models: • Full-size SBE 32 for a 12 or 24-position system (36-position custom). • Compact SBE 32C for a 12-position sampler with bottles up to 8 liters, for use with limited vertical clearance.
Cruise: NBP1608
NBP1608
Community Standard Description
International Council for the Exploration of the Sea
RVIB Nathaniel B. Palmer
vessel
NBP1608
Bethany D. Jenkins
University of Rhode Island
Community Standard Description
International Council for the Exploration of the Sea
RVIB Nathaniel B. Palmer
vessel