http://lod.bco-dmo.org/id/dataset/865249
eng; USA
utf8
dataset
Highest level of data collection, from a common set of sensors or instrumentation, usually within the same research project
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
2021-11-19
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
Iodine speciation and isotope data from iodine tracer experiments at the WHOI Environmental Systems Laboratory on Martha’s Vineyard Sound
2022-01-04
publication
2022-01-04
revision
Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)
2022-01-10
publication
https://doi.org/10.26008/1912/bco-dmo.865249.1
Dalton Hardisty
Michigan State University
principalInvestigator
Sune G. Nielsen
Woods Hole Oceanographic Institution
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: Hardisty, D., Nielsen, S. G. (2022) Iodine speciation and isotope data from iodine tracer experiments at the WHOI Environmental Systems Laboratory on Martha’s Vineyard Sound. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2022-01-04 [if applicable, indicate subset used]. doi:10.26008/1912/bco-dmo.865249.1 [access date]
Martha’s Vineyard Sound Iodine Isotope Tracer Experiments Dataset Description: Methods and Sampling: <p>See Hardisty et al., 2020 for a detailed description. A brief description is provided below.</p>
<p>Seawater was collected from Martha's Vineyard Sound at the Woods Hole Oceanographic Institution's (WHOI) Environmental Systems Laboratory (ESL). ESL intakes seawater from polypropylene pipes located approximately 200 meters (m) offshore from WHOI's Quissett Campus where water depths reach ~5 m. The pipes are located at approximately 0.5 m from the bottom and contain approximately 2.5 cm mesh.</p>
<p>We performed four separate incubation treatments. A large t0 batch was made for each experimental treatment, but each individual time point was allocated into a separate incubation vial, such that incubations were performed individually for each time point. Each treatment included independently incubated duplicates for each time point (10 mL). A t0 sub-sample was collected immediately following the addition of the Iodine-129 spike and sub-samples were harvested periodically over the course of 67 days. In order to prevent de-oxygenation and subsequent IO3− reduction, the seawater was kept aerated through the use of loose caps, which minimized any contamination through airborne particles but maintained equilibrium between the headspace and ambient atmosphere. The incubations were maintained on a shaker table at 180 rpm throughout the duration of the experiment.</p>
<p>The treatments from seawater collected from the ESL coastal station included: A.) unamended seawater; B.) seawater passed through passive sand-bed filtration (~0.5 mm) C.) a "kill treatment" which consisted of seawater passed through a 0.22-micrometer (um) filter and subsequently irradiated with UV light at 254 nm.</p>
<p>Incubations were conducted under both ambient laboratory light near an uncovered window and dark conditions, all at room temperature. For each experiment, the 129I spike was gravimetrically added, allowing for quantification of initial seawater I− concentrations.</p>
<p>Upon harvesting each time point, samples were immediately filtered (0.22 um syringe-filter) and stored at 4°C to maintain speciation.</p>
<p>The oxidized iodine, or IOX (IO3− + dissolved organic iodine), and I− were separated according to the chromatographic method described in detail in Hardisty et al., 2020. For the unamended seawater and "kill treatment", the time points were put through the chromatographic separation &lt;7 days after collection.</p>
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1829406 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1829406
completed
Dalton Hardisty
Michigan State University
(517) 353-5744
288 Farm Lane, Room 207
East Lansing
MI
488242600
US
hardist1@msu.edu
pointOfContact
Sune G. Nielsen
Woods Hole Oceanographic Institution
CRPG, CNRS, Université de Lorraine 15 rue Notre Dame des Pauvres
54501 Vandoeuvre lès Nancy
France
sune.nielsen@univ-lorraine.fr
pointOfContact
asNeeded
Dataset Version: 1
Unknown
Sample_ID
Sample_Treatment
Light_Dark
Time_Point
Ratio129_127_ox_Iodine
Ratio129_127_ox_Iodine_SD
Ratio129_127_Iodide
Ratio129_127_Iodide_SD
Iodide_127
Iodine_127_ox
Total_Iodide
Total_Iodine_ox
Thermo iCAP ICP-MS
ThermoFinnigan Neptune MC-ICP-MS
theme
None, User defined
sample identification
treatment
No BCO-DMO term
time_point
ratio
standard deviation
Ratio isotopes 127I/129I in iodide (I-)
iodide, iodine anion (I-)
oxidized iodine (IOX), iodate plus DOI
featureType
BCO-DMO Standard Parameters
Inductively Coupled Plasma Mass Spectrometer
Isotope-ratio Mass Spectrometer
instrument
BCO-DMO Standard Instruments
otherRestrictions
otherRestrictions
Access Constraints: none. Use Constraints: Please follow guidelines at: http://www.bco-dmo.org/terms-use Distribution liability: Under no circumstances shall BCO-DMO be liable for any direct, incidental, special, consequential, indirect, or punitive damages that result from the use of, or the inability to use, the materials in this data submission. If you are dissatisfied with any materials in this data submission your sole and exclusive remedy is to discontinue use.
Collaborative Research: Experimental constraints on the rates and mechanisms of iodine redox transformations in seawater
https://osprey.bco-dmo.org/project/860005
Collaborative Research: Experimental constraints on the rates and mechanisms of iodine redox transformations in seawater
<p><em>NSF Award Abstract:</em><br />
The goal of this study is to constrain the chemical and biological reactions controlling the iodine cycle in the marine environment. Seawater iodine plays a key role in the cycling of carbon, dissolved oxygen, and ozone, and has been hypothesized to also influence the elemental cycles of manganese and nitrogen. The composition of iodine in sedimentary rocks has also been proposed as an archive of ancient seawater oxygen availability. Unfortunately, few constraints currently exist on iodine reaction rates and mechanisms in seawater, limiting quantitative applications. To remedy this, scientists from Michigan State University (MSU) and Woods Hole Institute of Oceanography (WHOI) will use a rare iodine isotope, iodine-129, as a tracer of iodine chemical reactions in controlled seawater incubations designed to determine specific reaction rates and mechanisms from two end-member environments: well-oxygenated mid-Atlantic seawater as part of the United Kingdom-based Atlantic Meridional Transect (AMT) annual time series and low oxygen zones in the Pacific Ocean. The project will contribute to building the future United States STEM (Science Technology, Engineering and Mathematics)-trained workforce via the training of one graduate student and at least one undergraduate student from the campus of MSU. This includes hands-on field training and experience through two research cruises, extensive analytical training at WHOI, as well as experience in Earth system modeling simulations of iodine-oxygen interactions at the modern and ancient sea surface. The experimental constraints are designed to inform broader modeling of iodine-related chemical cycles for scientific communities including atmospheric and marine chemists, environmental regulators, and geologists.</p>
<p>The redox potential of iodate-iodide is uniquely poised for probable applications as both a redox tracer of Oxygen Minimum Zone (OMZ)-like conditions in modern and past oceans as well as a critical component of air-sea exchange reactions regulating tropospheric ozone levels. However, a currently limited understanding of the first-order rates and mechanisms of iodine redox transformations in seawater limits applications, which our research seeks to address. Specifically: (1) Marine iodate production, the oxidized and most abundant species, has yet to be observed experimentally despite the fact that most marine inputs from estuarine and other sources consist of the reduced species, iodide. Mass balance demands that in situ marine oxidation is widespread. The oxidant is unknown, but it is unlikely oxygen (O2) due to thermodynamic barriers. (2) Unconstrained in situ processes drive significant accumulation of reduced iodide in photic waters globally, particularly at low latitudes, which ultimately act as a major tropospheric ozone sink. (3) Constraints on rates and reaction mechanisms in OMZs are limited despite iodine being amongst the first redox-sensitive species to reduce under declining O2. We will employ an isotope tracer—iodine-129 as both iodide and iodate—in shipboard seawater incubation experiments to determine the rates and mechanisms of iodine redox transformations governing these widespread trends. This method will be deployed across the largest known gradients in marine iodine speciation—the Eastern Tropical North Pacific oxygen minimum zone and a latitudinal transect of photic and sub-photic waters as part of the Atlantic Meridional Transect. Incubation experiments from these cruises will be used to place first order constraints on the rates of iodine redox transformations at high- and low-[O2], the loci of most intense iodine redox cycling (both vertically and spatially), as well as the mechanisms driving redox transformations. Controls will test oxidants, biotic versus abiotic processes, as well as interactions and comparisons with similar redox cycles such as manganese and nitrogen.</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>
Iodine Redox
largerWorkCitation
project
eng; USA
oceans
2022-01-04
Martha’s Vineyard Sound and the Eastern Tropical North Pacific oxygen deficient zone
0
BCO-DMO catalogue of parameters from Iodine speciation and isotope data from iodine tracer experiments at the WHOI Environmental Systems Laboratory on Martha’s Vineyard Sound
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/865870.rdf
Name: Sample_ID
Units: unitless
Description: <p>identification of sample</p>
http://lod.bco-dmo.org/id/dataset-parameter/865871.rdf
Name: Sample_Treatment
Units: unitless
Description: <p>treatment of sample</p>
http://lod.bco-dmo.org/id/dataset-parameter/865872.rdf
Name: Light_Dark
Units: unitless
Description: <p>samples incubated under both ambient laboratory light near an uncovered window and dark conditions</p>
http://lod.bco-dmo.org/id/dataset-parameter/865873.rdf
Name: Time_Point
Units: unitless
Description: <p>time of sample treatment in hours</p>
http://lod.bco-dmo.org/id/dataset-parameter/865874.rdf
Name: Ratio129_127_ox_Iodine
Units: unitless
Description: <p>Oxidized iodine 129/127</p>
http://lod.bco-dmo.org/id/dataset-parameter/865875.rdf
Name: Ratio129_127_ox_Iodine_SD
Units: unitless
Description: <p>One standard deviation of Ratio129_127_ox_Iodine</p>
http://lod.bco-dmo.org/id/dataset-parameter/865876.rdf
Name: Ratio129_127_Iodide
Units: unitless
Description: <p>Iodide isotope ratios 129/127</p>
http://lod.bco-dmo.org/id/dataset-parameter/865877.rdf
Name: Ratio129_127_Iodide_SD
Units: unitless
Description: <p>One standard deviation of Ratio_129_127_Iodide</p>
http://lod.bco-dmo.org/id/dataset-parameter/865878.rdf
Name: Iodide_127
Units: nM
Description: <p>Iodine 127</p>
http://lod.bco-dmo.org/id/dataset-parameter/865879.rdf
Name: Iodine_127_ox
Units: nM
Description: <p>Oxidized iodine 127</p>
http://lod.bco-dmo.org/id/dataset-parameter/865880.rdf
Name: Total_Iodide
Units: nM
Description: <p>Total iodide in sample</p>
http://lod.bco-dmo.org/id/dataset-parameter/865881.rdf
Name: Total_Iodine_ox
Units: nM
Description: <p>Total oxidized iodine in sample</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
3577
https://darchive.mblwhoilibrary.org/bitstream/1912/27908/1/dataset-865249_martha___s-vineyard-sound-iodine-isotope-tracer-experiments__v1.tsv
download
https://doi.org/10.26008/1912/bco-dmo.865249.1
download
onLine
dataset
<p>See Hardisty et al., 2020 for a detailed description. A brief description is provided below.</p>
<p>Seawater was collected from Martha's Vineyard Sound at the Woods Hole Oceanographic Institution's (WHOI) Environmental Systems Laboratory (ESL). ESL intakes seawater from polypropylene pipes located approximately 200 meters (m) offshore from WHOI's Quissett Campus where water depths reach ~5 m. The pipes are located at approximately 0.5 m from the bottom and contain approximately 2.5 cm mesh.</p>
<p>We performed four separate incubation treatments. A large t0 batch was made for each experimental treatment, but each individual time point was allocated into a separate incubation vial, such that incubations were performed individually for each time point. Each treatment included independently incubated duplicates for each time point (10 mL). A t0 sub-sample was collected immediately following the addition of the Iodine-129 spike and sub-samples were harvested periodically over the course of 67 days. In order to prevent de-oxygenation and subsequent IO3− reduction, the seawater was kept aerated through the use of loose caps, which minimized any contamination through airborne particles but maintained equilibrium between the headspace and ambient atmosphere. The incubations were maintained on a shaker table at 180 rpm throughout the duration of the experiment.</p>
<p>The treatments from seawater collected from the ESL coastal station included: A.) unamended seawater; B.) seawater passed through passive sand-bed filtration (~0.5 mm) C.) a "kill treatment" which consisted of seawater passed through a 0.22-micrometer (um) filter and subsequently irradiated with UV light at 254 nm.</p>
<p>Incubations were conducted under both ambient laboratory light near an uncovered window and dark conditions, all at room temperature. For each experiment, the 129I spike was gravimetrically added, allowing for quantification of initial seawater I− concentrations.</p>
<p>Upon harvesting each time point, samples were immediately filtered (0.22 um syringe-filter) and stored at 4°C to maintain speciation.</p>
<p>The oxidized iodine, or IOX (IO3− + dissolved organic iodine), and I− were separated according to the chromatographic method described in detail in Hardisty et al., 2020. For the unamended seawater and "kill treatment", the time points were put through the chromatographic separation &lt;7 days after collection.</p>
Specified by the Principal Investigator(s)
<p><strong>Data Processing:</strong><br />
Matlab was used for processing iodine isotope data.</p>
<p><strong>BCO-DMO Processing:</strong><br />
- Adjusted field/parameter names to comply with BCO-DMO naming conventions;<br />
- Missing data identifier 'NA' replaced with 'nd' (BCO-DMO's default missing data identifier);<br />
- Added a conventional header with dataset name, PI names, version date.</p>
Specified by the Principal Investigator(s)
asNeeded
7.x-1.1
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
Thermo iCAP ICP-MS
Thermo iCAP ICP-MS
PI Supplied Instrument Name: Thermo iCAP ICP-MS PI Supplied Instrument Description:An ICP Mass Spec is an instrument that passes nebulized samples into an inductively-coupled gas plasma (8-10000 K) where they are atomized and ionized. Ions of specific mass-to-charge ratios are quantified in a quadrupole mass spectrometer. Instrument Name: Inductively Coupled Plasma Mass Spectrometer Instrument Short Name:ICP Mass Spec Instrument Description: An ICP Mass Spec is an instrument that passes nebulized samples into an inductively-coupled gas plasma (8-10000 K) where they are atomized and ionized. Ions of specific mass-to-charge ratios are quantified in a quadrupole mass spectrometer. Community Standard Description: http://vocab.nerc.ac.uk/collection/L05/current/LAB15/
ThermoFinnigan Neptune MC-ICP-MS
ThermoFinnigan Neptune MC-ICP-MS
PI Supplied Instrument Name: ThermoFinnigan Neptune MC-ICP-MS PI Supplied Instrument Description:ThermoFinnigan Neptune MC-ICP-MS at the WHOI Plasma Facility. Instrument Name: Isotope-ratio Mass Spectrometer Instrument Short Name:IR Mass Spec; IRMS Instrument Description: The Isotope-ratio Mass Spectrometer is a particular type of mass spectrometer used to measure the relative abundance of isotopes in a given sample (e.g. VG Prism II Isotope Ratio Mass-Spectrometer). Community Standard Description: http://vocab.nerc.ac.uk/collection/L05/current/LAB16/